Prof. Dr. RAMAZAN G&#220;RKAN

MICROCHEMICAL JOURNAL , cilt.147, ss.999-1009, 2019 (SCI-Expanded)

Monitoring of some trace metals in honeys by flame atomic absorption spectrometry after ultrasound assisted-dispersive liquid liquid microextraction using natural deep eutectic solvent

Altunay N., Elik A., Gürkan R.

MICROCHEMICAL JOURNAL , cilt.147, ss.49-59, 2019 (SCI-Expanded)

Vortex assisted-ionic liquid based dispersive liquid liquid microextraction of low levels of nickel and cobalt in chocolate-based samples and their determination by FAAS

ALTUNAY N., ELİK A., GÜRKAN R.

MICROCHEMICAL JOURNAL , cilt.147, ss.277-285, 2019 (SCI-Expanded)

Development of a new analytical method for Pb preconcentration and its further determination in water and foodstuffs using relatively low-sensitivity flame atomic absorption spectrometry

GÜRKAN R.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY , cilt.99, sa.10, ss.977-995, 2019 (SCI-Expanded) Sürdürülebilir Kalkınma

Preconcentration and Determination of Trace Nickel and Cobalt in Milk-Based Samples by Ultrasound-Assisted Cloud Point Extraction Coupled with Flame Atomic Absorption Spectrometry

Temel N., Sertakan K., GÜRKAN R.

BIOLOGICAL TRACE ELEMENT RESEARCH , cilt.186, sa.2, ss.597-607, 2018 (SCI-Expanded)

Combination of Ultrasound-Assisted Cloud-Point Extraction with Spectrophotometry for Extraction, Preconcentration, and Determination of Low Levels of Free Formaldehyde from Cosmetic Products

JOURNAL OF AOAC INTERNATIONAL , cilt.101, sa.6, ss.1763-1772, 2018 (SCI-Expanded)

A new method of UA_CPE coupled with spectrophotometry for the faster and cost-effective detection of proline in fruit juice, honey, and wine

Dagdeviren S., ALTUNAY N., Sayman Y., GÜRKAN R.

FOOD CHEMISTRY , cilt.255, ss.31-40, 2018 (SCI-Expanded)

Preconcentration and indirect quantification of trace nitrite, nitrate and total nitrite in selected beverage and milk samples using ion-pairing cloud-point extraction with acridine orange's

JOURNAL OF FOOD COMPOSITION AND ANALYSIS , cilt.69, ss.129-139, 2018 (SCI-Expanded)

Extraction and preconcentration of trace Al and Cr from vegetable samples by vortex-assisted ionic liquid-based dispersive liquid-liquid microextraction prior to atomic absorption spectrometric determination

ALTUNAY N., Yildirim E., GÜRKAN R.

FOOD CHEMISTRY , cilt.245, ss.586-594, 2018 (SCI-Expanded)

Preconcentration and Determination of Trace Vanadium(V) in Beverages by Combination of Ultrasound Assisted-cloud Point Extraction with Spectrophotometry

ACTA CHIMICA SLOVENICA , cilt.65, sa.1, ss.138-149, 2018 (SCI-Expanded)

Simple and fast spectrophotometric determination of low levels of thiabendazole residues in fruit and vegetables after pre-concentration with ionic liquid phase microextraction

ALTUNAY N., Uluzger D., GÜRKAN R.

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT , cilt.35, sa.6, ss.1139-1154, 2018 (SCI-Expanded)

Application of simple, fast and eco-friendly ultrasound-assisted-cloud point extraction for pre-concentration of zinc, nickel and cobalt from foods and vegetables prior to their flame atomic absorption spectrometric determinations

ALTUNAY N., ELİK A., Bulutlu C., GÜRKAN R.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY , cilt.98, sa.7, ss.655-675, 2018 (SCI-Expanded)

Extraction and reliable determination of acrylamide from thermally processed foods using ionic liquid-based ultrasound-assisted selective microextraction combined with spectrophotometry

ALTUNAY N., ELİK A., GÜRKAN R.

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT , cilt.35, sa.2, ss.222-232, 2018 (SCI-Expanded)

Using Safranin T as a Charge Transfer-Sensitive Ion-Pairing Reagent in Ultrasound-Assisted Cloud Point Extraction: Determination of Bisphenol A in Selected Beverages

JOURNAL OF AOAC INTERNATIONAL , cilt.101, sa.1, ss.277-287, 2018 (SCI-Expanded)

Ionic liquid based ion-pairing microextraction combined with spectrophotometry for preconcentration and quantitation of melamine in milk and milk-based products

ALTUNAY N., Demir O., GÜRKAN R.

LWT-FOOD SCIENCE AND TECHNOLOGY , cilt.86, ss.352-360, 2017 (SCI-Expanded)

Extraction, Preconcentration, and Quantification of Low Levels of Free Formaldehyde from Some Beverage Matrices by Combination of Ultrasound-Assisted-Cloud Point Extraction with Spectrophotometry

FOOD ANALYTICAL METHODS , cilt.10, sa.12, ss.4024-4037, 2017 (SCI-Expanded)

Indirect determination of the flavor enhancer maltol in foods and beverages through flame atomic absorption spectrometry after ultrasound assisted-cloud point extraction

Altunay N., Gürkan R., Orhan U.

FOOD CHEMISTRY , cilt.235, ss.308-317, 2017 (SCI-Expanded)

Ionic liquid based ion-pairing microextraction combined with spectrophotometry for preconcentration and quantitation of melamine in milk and milk-based products

Altunay N., Demir Ö., Gürkan R.

LWT-FOOD SCIENCE AND TECHNOLOGY , cilt.86, sa.86, ss.352-360, 2017 (SCI-Expanded)

Development of a New Methodology for Indirect Determination of Nitrite, Nitrate, and Total Nitrite in the Selected Two Groups of Foods by Spectrophotometry

ALTUNAY N., GÜRKAN R., Olgac E.

FOOD ANALYTICAL METHODS , cilt.10, sa.7, ss.2194-2206, 2017 (SCI-Expanded)

A New Ultrasonic Thermostatic-Assisted Cloud Point Extraction/Spectrophotometric Method for the Preconcentration and Determination of Bisphenol A in Food, Milk, and Water Samples in Contact with Plastic Products

Yildirim E., GÜRKAN R., ALTUNAY N.

FOOD ANALYTICAL METHODS , cilt.10, sa.6, ss.1765-1776, 2017 (SCI-Expanded) Sürdürülebilir Kalkınma

Extraction, preconcentration and spectrophotometric determination of trace levels of thiosulfate in environmental waters

GÜRKAN R., ALTUNAY N., Gurkan N.

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY , cilt.14, sa.5, ss.1033-1049, 2017 (SCI-Expanded)

A micellar sensitized kinetic method for quantification of low levels of bisphenol A in foodstuffs by spectrophotometry

ANALYTICAL METHODS , cilt.9, sa.7, ss.1190-1200, 2017 (SCI-Expanded)

Speciative determination of total V and dissolved inorganic vanadium species in environmental waters by catalytic–kinetic spectrophotometric method

GÜRKAN R., Tamay A., ULUSOY H. İ.

Arabian Journal of Chemistry , cilt.10, 2017 (SCI-Expanded)

Simultaneous determination of dissolved inorganic chromium species in wastewater/natural waters by surfactant sensitized catalytic kinetic spectrophotometry

GÜRKAN R., ULUSOY H. İ., Akçay M.

Arabian Journal of Chemistry , cilt.10, 2017 (SCI-Expanded)

Determination of sub-ng g(-1) levels of total inorganic arsenic and selenium in foods by hydride-generation atomic absorption spectrometry after pre-concentration

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT , cilt.34, sa.3, ss.390-403, 2017 (SCI-Expanded)

A preconcentration method for indirect determination of acrylamide from chips, crackers and cereal-based baby foods using flame atomic absorption spectrometry

ALTUNAY N., GÜRKAN R., Orhan U.

TALANTA , cilt.161, ss.143-150, 2016 (SCI-Expanded) Sürdürülebilir Kalkınma

Separation/preconcentration of ultra-trace levels of inorganic Sb and Se from different sample matrices by charge transfer sensitized ion-pairing using ultrasonic-assisted cloud point extraction prior to their speciation and determination by hydride generation AAS

TALANTA , cilt.159, ss.344-355, 2016 (SCI-Expanded)

Application of ultrasonic-assisted cloud point extraction/flame atomic absorption spectrometry (UA-CPE/FAAS) for preconcentration and determination of low levels of antimony in some beverage samples

GÜRKAN R., Eser M.

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY , cilt.13, sa.9, ss.1579-1591, 2016 (SCI-Expanded)

Preconcentration and determination of vanadium and molybdenum in milk, vegetables and foodstuffs by ultrasonic-thermostatic-assisted cloud point extraction coupled to flame atomic absorption spectrometry

GÜRKAN R., Korkmaz S., ALTUNAY N.

TALANTA , cilt.155, ss.38-46, 2016 (SCI-Expanded)

A simple and efficient ultrasonic-assisted extraction procedure combined with UV-Vis spectrophotometry for the pre-concentration and determination of folic acid (vitamin B-9) in various sample matrices

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT , cilt.33, sa.7, ss.1127-1138, 2016 (SCI-Expanded)

A Simple, Low-Cost, and Useful Preconcentration Method for Quantification of Soluble, Insoluble, and Total Oxalate in Selected Vegetables Through Spectrophotometry

FOOD ANALYTICAL METHODS , cilt.9, sa.4, ss.950-965, 2016 (SCI-Expanded) Sürdürülebilir Kalkınma

A New Micellar Mediated Cloud-Point Extraction Procedure for Sensitive and Selective Determination of Trace Amounts of Total Iodine in Milk-Based Nutritional Products by Means of Indirect Spectrophotometry

FOOD ANALYTICAL METHODS , cilt.9, sa.2, ss.505-518, 2016 (SCI-Expanded)

A new simple UV-Vis spectrophotometric method for determination of sulfite species in vegetables and dried fruits using a preconcentration process

ANALYTICAL METHODS , cilt.8, sa.2, ss.342-352, 2016 (SCI-Expanded)

A simple and efficient approach for preconcentration of some heavy metals in cosmetic products before their determinations by flame atomic absorption spectrometry

TURKISH JOURNAL OF CHEMISTRY , cilt.40, sa.6, ss.988-1001, 2016 (SCI-Expanded)

Photocatalytic TiO2-catalyzed degradation of bromophenol blue-mediated Mo(VI)-peroxo complexes inthe presence of SDS

KARTAL TEMEL N., GÜRKAN R., Ayan F.

DESALINATION AND WATER TREATMENT , cilt.57, sa.44, ss.21083-21090, 2016 (SCI-Expanded)

Simultaneous determination of antimony and boron in beverage and dairy products by flame atomic absorption spectrometry after separation and pre-concentration by cloud-point extraction

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT , cilt.33, sa.2, ss.271-281, 2016 (SCI-Expanded)

Preconcentration of sulfite from food and beverage matrices by ultrasonic assisted-cloud point extraction prior to its indirect determination by flame atomic absorption spectrometry

RSC ADVANCES , cilt.6, sa.25, ss.20961-20970, 2016 (SCI-Expanded) Sürdürülebilir Kalkınma

Ultrasound assisted extraction and spectrophotometric determination of trace selenium in water, food and vegetable samples

ALTUNAY N., GÜRKAN R., Gunes M.

ANALYTICAL METHODS , cilt.8, sa.46, ss.8208-8218, 2016 (SCI-Expanded) Sürdürülebilir Kalkınma

Determination of low levels of Cd(II) in cosmetic products by spectrophotometry after separation/preconcentration with cloud point extraction

ANALYTICAL METHODS , cilt.8, sa.12, ss.2673-2683, 2016 (SCI-Expanded)

A new atomic absorption-based method development for indirect determination of histamine in fish samples, dairy products, and alcoholic beverages by flame AAS

ALTUNAY N., GÜRKAN R., Tetik M.

ANALYTICAL METHODS , cilt.8, sa.25, ss.5142-5151, 2016 (SCI-Expanded)

Spectrophotometric determination of low levels arsenic species in beverages after ion-pairing vortex-assisted cloud-point extraction with acridine red

ALTUNAY N., GÜRKAN R., Kir U.

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT , cilt.33, sa.2, ss.259-270, 2016 (SCI-Expanded)

Catalytic spectrophotometric determination of trace Mo(VI) in milk-based beverages in the presence of bromophenol blue and H2O2 using SDS as a sensitizer

ANALYTICAL METHODS , cilt.8, sa.33, ss.6284-6292, 2016 (SCI-Expanded)

A new ultrasonic-assisted cloud-point-extraction procedure for pre-concentration and determination of ultra-trace levels of copper in selected beverages and foods by flame atomic absorption spectrometry

ALTUNAY N., GÜRKAN R., Orhan U.

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT , cilt.32, sa.9, ss.1475-1487, 2015 (SCI-Expanded)

Indirect Determination of Free, Total, and Reversibly Bound Sulfite in Selected Beverages by Spectrophotometry Using Ultrasonic-Assisted Cloud Point Extraction as a Preconcentration Step

ALTUNAY N., GÜRKAN R., Sertakan K.

FOOD ANALYTICAL METHODS , cilt.8, sa.8, ss.2094-2106, 2015 (SCI-Expanded)

Quantification of 5-hydroxymethylfurfural in honey samples and acidic beverages using spectrophotometry coupled with ultrasonic-assisted cloud point extraction

JOURNAL OF FOOD COMPOSITION AND ANALYSIS , cilt.42, ss.141-151, 2015 (SCI-Expanded)

A Novel Preconcentration Procedure Using Neutral Red as Ion-Pairing Reagent for Determination of Inorganic Dissolved Arsenic Species in Different Water and Beverages by Spectrophotometry

Guerkan R., Kir U., ALTUNAY N.

FOOD ANALYTICAL METHODS , cilt.8, sa.7, ss.1637-1651, 2015 (SCI-Expanded)

Development of a simple, sensitive and inexpensive ion-pairing cloud point extraction approach for the determination of trace inorganic arsenic species in spring water, beverage and rice samples by UV-Vis spectrophotometry

GÜRKAN R., Mr U., ALTUNAY N.

FOOD CHEMISTRY , cilt.180, ss.32-41, 2015 (SCI-Expanded)

Determination of total Sn in some canned beverages by FAAS after separation and preconcentration

FOOD CHEMISTRY , cilt.177, ss.102-110, 2015 (SCI-Expanded)

A new cloud point extraction procedure for determination of inorganic antimony species in beverages and biological samples by flame atomic absorption spectrometry

FOOD CHEMISTRY , cilt.175, ss.507-515, 2015 (SCI-Expanded)

An Inexpensive and Sensitive Method for Speciative Determination of Sn(IV), Sn(II), and Total Sn as Sn(IV) in Selected Beverages by Micellar Improved Spectrophotometry

FOOD ANALYTICAL METHODS , cilt.8, sa.4, ss.994-1004, 2015 (SCI-Expanded)

A new preconcentration procedure to quantify total acid hydrolyzed fluoride in selected beverages and foods by spectrophotometry

GÜRKAN R., ALTUNAY N., Korkmaz S.

ANALYTICAL METHODS , cilt.7, sa.12, ss.5081-5091, 2015 (SCI-Expanded)

Ultrasound assisted-cloud point extraction combined with flame atomic absorption spectrometry for selective preconcentration and determination of As(v) in selected water and beverage samples

ALTUNAY N., GÜRKAN R., Kir U.

ANALYTICAL METHODS , cilt.7, sa.16, ss.6629-6639, 2015 (SCI-Expanded)

A simple, inexpensive and convenient procedure for determination of inorganic Sb species in milk and beverage samples in PET containers by flame atomic absorption spectrometry

ULUSOY H. İ., YILMAZ Ö., GÜRKAN R.

ANALYTICAL METHODS , cilt.7, sa.23, ss.9850-9860, 2015 (SCI-Expanded)

Development of a new analytical methodology based on the catalytic effect of AG(I) in a new fuchsin-peroxodisulfate-1,10-phenantroline system: Application to the determination of trace amounts of silver

GÜRKAN R., ULUSOY H. İ.

Journal of the Chilean Chemical Society , cilt.59, sa.3, ss.2531-2536, 2014 (SCI-Expanded)

Micellar sensitized catalytic kinetic spectrophotometry for highly accurate and reproducible determination of V(IV) and V(V)

GÜRKAN R., Emektas C.

RARE METALS , cilt.33, sa.4, ss.466-478, 2014 (SCI-Expanded)

Determination of Trace Cadmium in Nonalcoholic Beverages by Coupling Cloud Point Extraction with Spectrophotometry

Gurkan R., Altunay N.

POLISH JOURNAL OF FOOD AND NUTRITION SCIENCES , cilt.63, sa.4, ss.253-260, 2013 (SCI-Expanded)

A fast and reliable method for quantitative determination of total mercury in vegetables

GÜRKAN R., Kir U.

TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY , cilt.95, sa.10, ss.1659-1674, 2013 (SCI-Expanded)

Determination of low levels of molybdenum (VI) in food samples and beverages by cloud point extraction coupled with flame atomic absorption spectrometry

GÜRKAN R., Aksoy Ü., ULUSOY H. İ., Akçay M.

Journal of Food Composition and Analysis , cilt.32, sa.1, ss.74-82, 2013 (SCI-Expanded)

Cloud point extraction of trace cyanide from environmental waters for indirect flame atomic absorption spectrometric determination

GÜRKAN R., Yilmaz O.

TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY , cilt.95, sa.9, ss.1455-1469, 2013 (SCI-Expanded)

Indirect quantification of trace levels cyanide in environmental waters through flame atomic absorption spectrometry coupled with cloud point extraction

GÜRKAN R., Yilmaz O.

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY , cilt.10, sa.4, ss.631-642, 2013 (SCI-Expanded)

A micellar improved method for trace levels selenium quantification in food samples, alcoholic and nonalcoholic beverages through CPE/FAAS

FOOD CHEMISTRY , cilt.139, ss.1008-1014, 2013 (SCI-Expanded)

A RELIABLE METHOD OF QUANTIFICATION OF TRACE COPPER IN BEVERAGES WITH AND WITHOUT ALCOHOL BY SPECTROPHOTOMETRY AFTER CLOUD POINT EXTRACTION

GÜRKAN R., ULUSOY H. İ., Dönmez M.

QUIMICA NOVA , cilt.36, ss.1146-1154, 2013 (SCI-Expanded)

A reliable determination of zinc levels in beverages with and without alcohol by flame atomic absorption spectrometry after cloud point extraction

Guerkan R., ALTUNAY N.

ANALYTICAL METHODS , cilt.5, sa.7, ss.1755-1763, 2013 (SCI-Expanded)

Inexpensive and versatile method for trace Sn(II) and Sn(IV) ions in food samples by CPE/FAAS

ULUSOY S., ULUSOY H. İ., Akçay M., GÜRKAN R.

Food Chemistry , cilt.134, sa.1, ss.419-426, 2012 (SCI-Expanded)

Micelle-Mediated Extraction and Flame Atomic Absorption Spectrometric Method for Determination of Trace Cobalt Ions in Beverage Samples

ULUSOY H. İ., GÜRKAN R., Demir Ö., ULUSOY S.

Food Analytical Methods , cilt.5, sa.3, ss.454-463, 2012 (SCI-Expanded)

Development of a cloud point extraction and preconcentration method for chromium(III) and total chromium prior to flame atomic absorption spectrometry

ULUSOY H. İ., GÜRKAN R., YIlmaz Ö., Akçay M.

Journal of Analytical Chemistry , cilt.67, sa.2, ss.131-139, 2012 (SCI-Expanded)

Determination of trace amounts of Cu(II) in drinking and wastewater samples by a novel catalytic kinetic spectrophotometric method

International Journal of Environmental Analytical Chemistry , cilt.92, sa.2, ss.148-165, 2012 (SCI-Expanded)

Cloud point extraction and spectrophotometric determination of mercury species at trace levels in environmental samples

ULUSOY H. İ., GÜRKAN R., ULUSOY S.

TALANTA , cilt.88, ss.516-523, 2012 (SCI-Expanded)

Surfactant-sensitized spectrophotometric determination of Hg(II) in water samples using 2-(2-thiazolylazo)-p-cresol as ligand and cetylpyridinium chloride as cationic surfactant

GÜRKAN R., Cepken T., ULUSOY H. İ.

TURKISH JOURNAL OF CHEMISTRY , cilt.36, sa.1, ss.159-177, 2012 (SCI-Expanded)

Determination of ultra trace arsenic species in water samples by hydride generation atomic absorption spectrometry after cloud point extraction

ULUSOY H. İ., Akçay M., ULUSOY S., GÜRKAN R.

Analytica Chimica Acta , cilt.703, sa.2, ss.137-144, 2011 (SCI-Expanded)

A novel indicator system for catalytic spectrophotometric determination and speciation of inorganic selenium species (Se(IV), Se(VI)) at trace levels in natural lake and river water samples

GÜRKAN R., ULUSOY H. İ., Akçay M., Bulut P.

Rare Metals , cilt.30, sa.5, ss.477-487, 2011 (SCI-Expanded)

Development of an inexpensive and sensitive method for the determination of low quantity of arsenic species in water samples by CPE-FAAS

ULUSOY H. İ., Akcay M., GÜRKAN R.

TALANTA , cilt.85, sa.3, ss.1585-1591, 2011 (SCI-Expanded)

Development of a cloud point extraction and preconcentration method for determination of trace aluminum in mineral waters by FAAS

ULUSOY H. İ., GÜRKAN R., Aksoy Ü., Akçay M.

Microchemical Journal , cilt.99, sa.1, ss.76-81, 2011 (SCI-Expanded)

Catalytic-kinetic spectrophotometric determination of vanadium (V) based on the Celestine blue-bromate-vanadium (V)-citric acid reaction

GÜRKAN R., Gurkan O.

RARE METALS , cilt.30, sa.4, ss.348-358, 2011 (SCI-Expanded)

Kinetic spectrophotometric determination of trace copper(II) ions by their catalytic effect on the reduction of brilliant cresyl blue by ascorbic acid

ULUSOY H. İ., GÜRKAN R., Akçay M.

Turkish Journal of Chemistry , cilt.35, sa.4, ss.599-612, 2011 (SCI-Expanded)

CATALYTIC SPECTROPHOTOMETRIC DETERMINATION OF Mn(II) AT TRACE LEVELS USING CELESTINE BLUE-KIO4-1,10-PHENANTROLINE REDOX REACTION

Gurkan R.

BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA , cilt.25, sa.3, ss.333-346, 2011 (SCI-Expanded)

The investigation of a novel indicator system for trace determination and speciation of selenium in natural water samples by kinetic spectrophotometric detection

GÜRKAN R., ULUSOY H. İ.

Bulletin of the Korean Chemical Society , cilt.31, sa.7, ss.1907-1914, 2010 (SCI-Expanded)

Removal of Cu(II), Zn(II) and Co(II) ions from aqueous solutions by adsorption onto natural bentonite

Kubilay S., Gurkan R., Savran A., Sahan T.

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY , cilt.13, sa.1, ss.41-51, 2007 (SCI-Expanded)

Determination of the surface properties of untreated and chemically treated kaolinites by inverse gas chromatography

Kubilay S., Guerkan R., Savran A., Yalcinkaya Z.

COLLOID JOURNAL , cilt.68, sa.3, ss.274-284, 2006 (SCI-Expanded)

Determination of Sodium and Potassium in Certified Rock Samples by AES after Ultrasonic Leaching J. Serb. Chem. Soc., vol.71, pp.949-955, 2006

Gürkan R., Özkan M. H., Özkan A., Akçay M.

Journal Of The Serbian Chemical Society , cilt.71, ss.949-955, 2006 (SCI-Expanded)

Evaluation of the thermodynamic parameters for the adsorption of some hydrocarbons on chemically treated-bentonites by inverse gas chromatography

Gurkan R., Ceylan H., Sahan T., Savran A., Kubilay S.

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY , cilt.11, ss.603-612, 2005 (SCI-Expanded)

Investigation of separation and identification possibilities of some metal-dithizonate complexes by sequential TLC-IR system

Gurkan R., Savasci S., Ozkan M., Akcay M.

JOURNAL OF ANALYTICAL CHEMISTRY , cilt.60, sa.9, ss.800-804, 2005 (SCI-Expanded)

Investigation of separation and identification possibilities of some metal-DEDTC complexes by sequential TLC-IR system

Gurkan R., Savasci S.

JOURNAL OF CHROMATOGRAPHIC SCIENCE , cilt.43, sa.6, ss.324-328, 2005 (SCI-Expanded)

Determination of manganese and lead in roadside soil samples by FAAS with ultrasound assisted leaching

Ozkan M., Gurkan R., Ozkan A., Akcay M.

JOURNAL OF ANALYTICAL CHEMISTRY , cilt.60, sa.5, ss.469-474, 2005 (SCI-Expanded)

Removal of some heavy metal cations from aqueous solution by adsorption onto natural kaolin

Ceylan H., Sahan T., Gurkan R., Kubilay S.

ADSORPTION SCIENCE & TECHNOLOGY , cilt.23, sa.7, ss.519-534, 2005 (SCI-Expanded)

Photocatalytic degradation of a textile azo dye, Sirius Gelb GC on TiO2 or Ag-TiO2 particles in the absence and presence of UV irradiation: the effects of some inorganic anions on the photocatalysis

Ozkan A., Ozkan M., Gurkan R., Akcay M., Sokmen M.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY , cilt.163, ss.29-35, 2004 (SCI-Expanded)

Determination of trace amounts of iodide by an inhibition kinetic spectrophotometric method

Gurkan R., Bicer N., Ozkan M., Akcay M.

TURKISH JOURNAL OF CHEMISTRY , cilt.28, sa.2, ss.181-191, 2004 (SCI-Expanded) Sürdürülebilir Kalkınma

Investigation of Pd-catalyzed Co(III)-EDTA/hypophosphite inhibition reaction kinetics, mechanism and the evaluation of its analytical application possibilities

Bicer N., Gurkan R., Akcay M., Altunata T.

JOURNAL OF THE SERBIAN CHEMICAL SOCIETY , cilt.69, sa.2, ss.123-135, 2004 (SCI-Expanded)

Kinetic spectrophotometric determination of trace amounts of selenium based on the catalytic reduction of maxilon blue-SG by sulfide

Gurkan R., Akcay M.

MICROCHEMICAL JOURNAL , cilt.75, sa.1, ss.39-49, 2003 (SCI-Expanded)

Diğer Dergilerde Yayınlanan Makaleler

Determination of trace amounts of selenium in natural spring waters and tea samples by catalytic kinetic spectrophotometry

Gürkan R., Gürkan N. Z.

Ecletica quimica Journal , cilt.44, sa.4, ss.57-72, 2019 (Scopus)

Determination of Trace Levels of Nitrite in Beverages Samples Through Micellar Improved Catalytic Kinetic Spectrophotometry

Elik A., Altunay N., Gürkan R.

Cumhuriyet Science Journal , cilt.38, sa.3, ss.400-411, 2017 (Hakemli Dergi)

A new ultrasonic assisted cloud point extraction and preconcentration procedure for the spectrophotometric oxalate determination in beverages

Hacettepe Journal of Biology and Chemistry , cilt.45, sa.1, ss.81-94, 2017 (Hakemli Dergi)

Determination of Trace Amounts of Total Fe as Fe(II) in Environmental Samples by Catalytic Kinetic Spectrophotometry

Yıldırım E., Altunay N., Gürkan R.

Cumhuriyet Science Journal , cilt.38, sa.2, ss.373, 2017 (Hakemli Dergi)

Determination of bisphenol A in plastic bottle packaging beverage samples using ultrasonic-assisted extraction and flame atomic absorption spectrometry

Journal of the Turkish Chemical Society, Section A: Chemistry , cilt.1, sa.1, ss.607, 2017 (Hakemli Dergi)

Photocatalytic Decolourization of Bromophenol Blue in Aqueous Solution with Cu(II)-Peroxo Complexes in Presence of SDS

Analytical Chemistry Letters , cilt.6, sa.4, ss.435-447, 2016 (Hakemli Dergi)

Speciative Determination of Dissolved Inorganic Fe(II), Fe(III) and Total Fe in Natural Waters by Coupling Cloud Point Extraction with FAAS

Gürkan R., Savaşçı Ş., Akçay M.

Pakistan Journal of Analytical & Environmental Chemistry , cilt.2, sa.14, ss.16-27, 2013 (Hakemli Dergi)

Surfactant enhanced-spectrophotometric determination of uranium (VI) at trace levels by using eriochrome black T as a chelating agent

Gürkan R., Ulusoy H. İ., Akçay M.

Ecletica Quimica , cilt.36, ss.37-46, 2011 (Scopus)

Catalytic Spectrophotometry for the Determination of Manganese at Trace Levels by a Novel Indicator Reaction

GÜRKAN R., ÇAYLAK O.

JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE , cilt.54, sa.5, ss.556-566, 2010 (ESCI)

A New Analytical Method for the Kinetic Spectrophotometric Determination of Trace Amounts of Nitrite in Some Environmental Water Samples

GÜRKAN R., ULUSOY H. İ., Akcay M.

EURASIAN JOURNAL OF ANALYTICAL CHEMISTRY , cilt.5, sa.1, ss.16-31, 2010 (ESCI)

Catalytic Spectrophotometry for the Determination of Manganese at Trace Levels by a Novel Indicator Reaction

Gürkan R., Çaylak O.

Journal of the Korean Chemical Society , cilt.54, sa.5, ss.556-566, 2010 (Scopus)

Micellar Sensitized Spectrophotometric Determination of Magnesium in Drinking Water

GÜRKAN R., ULUSOY H. İ., AKÇAY M.

Eurasian J. Anal. Chem., , cilt.4, sa.2, ss.127-140, 2009 (Hakemli Dergi)

A novel indicator reaction for the catalytic determination of V(V) at ppb levels by the kinetic spectrophotometric method

ULUSOY H. İ., GÜRKAN R.

Ecletica Quimica , cilt.34, sa.4, ss.49-64, 2009 (Scopus)

Dissolution Kinetics of Magmatic Rocks via Ultrasonic Leaching for Calcium Magnesium and Aluminum

Gürkan R., Özkan M. H., Akçay M., Özkan A.

Gazi University Journal of Science , cilt.21, ss.117-122, 2008 (ESCI)

Kinetic of Reduction of Maxilon Blue SG by Sulfide Ion Kinetic Salt Effect in Elucidation of Reaction Mechanism.23, pp.25-38, 2003

Gürkan R., Akçay M.

C.Ü Fen-Edebiyat Fakültesi, Fen Bilimleri Dergisi , cilt.23, ss.25-38, 2003 (Hakemli Dergi)

Bazı Metal Oksinat Komplekslerinin Ardışık TLC IR Sistemi ile Ayrılma ve Tanı Olanaklarının Araştırılması vol.24, pp.51-63, 2003

C.Ü. Fen-Edebiyat Fak. Fen Bilimleri Dergisi , cilt.24, ss.51-63, 2003 (Hakemli Dergi)

Hakemli Kongre / Sempozyum Bildiri Kitaplarında Yer Alan Yayınlar

Extraction, Preconcentration and Determination of low levels of melamine in milk based samples using UA-CPE, indirectly followed by FAAS using Eosin Y and Mn(II)

9. Ulusal Analitik Kimya Kongresi, Konya, 2018, Türkiye, 19 - 23 Eylül 2018

Maleik Anfıidrit-ard-Stiren Kopolimerinin 2-Hidrazinobenzothiazole ile Modifikasyonu,karakte r izasyonu ve Analitik Uygulamaları

ZENGİN H., GÜRKAN R.

ULUSLARARASI KATILIMLI P O L. İ M E R B İL İM V E V I » TEK NO LO J İ KONGRESİ09-12 Eylül 2018, Eskişehir-Türkiye, Eskişehir, Türkiye, 9 - 12 Eylül 2018

Ultrasound-Assisted Extraction of Nickel and Cobalt from Food Samples and Their Determination by Flame-AAS

Elik A., Meral S., Gürkan R., Altunay N.

International Trace Analysis Congress, Sivas, Türkiye, 20 - 23 Haziran 2018

Ionıc Lıquıd Assisted Microextraction Followed By Uv–Vis Spectrophotomet-ric Quantification Of Total Mercury İn Fish Samples

Elik A., Gürkan R., Altunay N.

International Trace Analysis Congress, Sivas, Türkiye, 20 - 23 Haziran 2018

Coupling of Ionic Liquid Based Microextraction and Spectrophotometry for Ex-traction, Preconcentration and Determination of Low Levels of Histamine in Fish and Meat Products

Elik A., Gürkan R., Altunay N.

International Trace Analysis Congress, Sivas, Türkiye, 20 - 23 Haziran 2018

Ion-Pairing Ultrasound Assisted-Cloud Point Extraction as a Preconcentration Tool prior to Determination of Low levels of Free Formaldehyde in Fruit Flavored Milk Drinks and Vinegar by Spectrophotometry

International TraceAnalysis Congress (iTAC2018), Sivas, Türkiye, 20 - 23 Haziran 2018

Extraction, Preconcentration and Determination of Low Levels of Acetaldehyde In Fruit Flavored Milk Drinks and Vinegar Using Ion-Pairing UA-CPE Coupled With Spectrophotometry

KARTAL TEMEL N., GÜRKAN R., GÜRKAN N.

International TraceAnalysis Congress (iTAC2018), Sivas, Türkiye, 20 - 23 Haziran 2018

Spectrophotometric Determination of Trace Amounts of Formaldehyde in Some Beverages after Preconcentration with Ion-Pairing Ultrasound Assisted-Cloud Point Extraction

8TH BLACK SEA BASIN CONFERENCE ON ANALYTICAL CHEMISTRY, 9 - 11 Mayıs 2018

Extraction, Preconcentration and Determination of Low levels of Sulfite from some Beverage Matrices by Ultrasonic Assisted-Cloud Point Extraction coupled with Spectrophotometry

KARTAL TEMEL N., GÜRKAN R., GÜRKAN N.

8TH BLACK SEA BASIN CONFERENCE ON ANALYTICAL CHEMISTRY, 9 - 11 Mayıs 2018

AN IMPROVED ULTRASOUND ASSISTED EXTRACTION METHOD FOR RAPID DETERMINATION OF PROLINE IN HONEY, WINE AND FRUIT SAMPLES BY SPECTROPHOTOMETRY

I. International Scientific and Vocational Studies Congress, Nevşehir, Türkiye, 5 - 08 Ekim 2017

A NOVEL AND ECO-FRIENDLY ULTRASOUND ASSISTEDMICROEXTRACTION METHOD FOR EXTRACTION AND DETERMINATION OF ZINC, NICKEL AND COBALT BY FAAS

Gürkan R., Elik A., Altunay N.

I. International Scientific and Vocational Studies Congress, Nevşehir, Türkiye, 5 - 08 Ekim 2017

A SIMPLE AND ECO-FRIENDLY METHOD TO DETERMINE CARMINE IN FOOD SAMPLES BASED ON ULTRASOUND-ASSISTED EXTRACTION AND SPECTROPHOTOMETRIC DETECTION

Elik A., Gürkan R., Altunay N.

I. International Scientific and Vocational Studies Congress, Nevşehir, Türkiye, 5 - 08 Ekim 2017

Balık Örneklerinde Histaminin Ultrasonik Destekli Örnek Hazırlama ve İyonik Sıvı Yardımlı Mikroekstraksiyon Sonrası Spektrofotometrik belirlenmes

Altunay N., Elik A., Gürkan R.

29. Ulusal Kimya kongresi, Ankara, Türkiye, 10 - 14 Eylül 2017

içecek Örneklerinde bulunan Bisfenol A nın ultrasonik destekli bulutlanma noktası ekstraksiyonu ile tayini

Yıldırım E., Altunay N., Gürkan R.

29. Ulusal Kimya Kongresi, Türkiye, 10 - 14 Eylül 2017

Development of a robust ultrasonic assisted ionic liquid-based dispersive liquid–liquid microextraction for preconcentration of Pb in vegetable samples

International Turkish Congress on Molecular Spectroscopy (TURCMOS2017), Muğla, Türkiye, 26 - 29 Ağustos 2017

Development of a fast analytical microextraction method for the determination of Sudan (II) in foodstuffs byspectrophotometry

Altunay N., Gürkan R., Ulaş O.

International Turkish Congress on Molecular Spectroscopy (TURCMOS2017), Antalya, Türkiye, 26 - 29 Ağustos 2017

SPEKTROFOTOMETRİK DEDEKSİYON İLE GERÇEK ÖRNEKLERDE ESER DÜZEYDEKİ Fe II NİN KATALİTİK KİNETİK BELİRLENMESİ

GÜRKAN R., ULUSOY H. İ., KARTAL TEMEL N., Çetin O.

Esan 2012, II. Eser Analiz Çalıştayı,Trabzon, Türkiye, 27 Haziran 2012 - 30 Haziran 2017

Bazı Sıvı Yağ Örneklerinde Toplam Vanadyumun V(V) Olarak Ekstraksiyonu, Zenginleştirilmesi ve Spektrofotometrik Tayini

KUŞ B., KARTAL TEMEL N., GÜRKAN R.

XV. Ulusal Spektroskopi Kongresi (Usk 2017), Yalova 2017, Türkiye, 17 - 19 Mayıs 2017

Çikolata Örneklerinde Eser Kobalt ve Nikel’in UA-CPE Yöntemi ile Ekstraksiyonu, Zenginleştirilmesi ve Spektrofotometrik Tayini

KARTAL TEMEL N., SERTAKAN K., GÜRKAN R.

XV. Ulusal Spektroskopi Kongresi (Usk 2017), Yalova, 2017., Türkiye, 17 - 19 Mayıs 2017

Ultrasonik Destekli Bulutlanma Noktası Ekstraksiyonu Yardımıyla Bazı Gıda Örneklerinde Sülfitin Zenginleştirilmesi ve Spektroskopik Olarak Tayini

IV. Eser Analiz Kongresi, Sakarya, Türkiye, 19 - 22 Mayıs 2016

A New Eco friendly and Rapid Ultrasound Assisted Cloud Point Extraction to Preconcentrate and Determine Sulfite from Vegetables and Dried Fruit Matrices

International Turkish Congress on Molecular Spectroscopy (TURCMOS 2015), Antalya, Türkiye, 13 - 18 Eylül 2015

After separation and preconcentration determination of Sb III Sb V and total Sb in beverage samples bottled in PET by flame atomic absorption spectrometry

7. Uluysal Analitik Kimya Kongresi, Türkiye, 1 - 05 Eylül 2014

Ultrasonik destekli bulutlanma noktası ekstraksiyonu ile zenginleştirmeden sonra kutu içeceklerde toplam bakırın FAAS ile Tayini

GÜRKAN R., ALTUNAY N., Ulaş O.

XIV. Ulusal Spektroskopi Kongresi, Türkiye, 29 - 31 Mayıs 2015

Ultrasonik destekli-bulutlanma noktası ekstraksiyonu ile zenginleştirmeden kutu içeceklerde toplam bakırın FAAS ile tayini

Altunay N., Gürkan R., Orhan U.

XIV. Ulusal Spektroskopi Kongresi, Elazığ, Türkiye, 29 - 31 Mayıs 2015

A New Cloud Point Extraction Method based on Separation and Preconcentration prior to Determination of Periodate in Milk and Fruit-Flavored Milk Samples By Spectrophotometry

7. Ulusal Analitik Kimya Kongresi, Kahramanmaraş, Türkiye, 1 - 05 Eylül 2014

After separatıon and preconcentration the determination of Sb III Sb V and total Sb in beverage samples bottled in PET by flame atomic absorption spectrometry

7. Ulusal Analitik Kimya Kongresi, Kahramanmaraş, Türkiye, 1 - 05 Eylül 2014

A novel preconcentratıon procedure usıng cloud poınt extractıon for determınatıon of ınorganıc dıssolved arsenıc specıes ın some beverage samples usıng spectrophotometry

Gürkan R., Kır U., Altunay N.

III. Eser Analiz Çalıştayı, Tokat, Türkiye, 15 - 18 Mayıs 2014

Determınatıon of free total and reversıble organıc matrıx bound sulfıte ın beverages by CPE UV VIS

Gürkan R., Sertakan K., Altunay N.

III. Eser Analiz Çalıştayı, Tokat, Türkiye, 15 - 18 Mayıs 2014

Cloud point extraction and spectrophotometric determination of nitrite in beverages with and without alcohol