Spectrophotometric determination of selenium(IV) with 4-methyl-o-phenylenediamine based on piazselenol formation

KARTAL Ş., Oymak T., TOKALIOĞLU Ş.

JOURNAL OF ANALYTICAL CHEMISTRY, cilt.65, sa.12, ss.1221-1227, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 65 Sayı: 12
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1134/s106193481012004x
  • Dergi Adı: JOURNAL OF ANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1221-1227
  • Anahtar Kelimeler: spectrofotometric determination, selenium(IV), 4-methyl-o-phenylenediamine, piazselenol, GAS-CHROMATOGRAPHY, INORGANIC SELENIUM, TRACE-ELEMENTS, SPECIATION, PRECONCENTRATION, WATER, SAMPLES
  • Sivas Cumhuriyet Üniversitesi Adresli: Hayır

Özet

A method has been developed for the spectrophotometric determination of selenium(IV) using 4-methyl-o-phenylenediamine (MOPDA) as a chromogenic reagent. In hydrochloric acid media at about pH 2, MOPDA forms a piazselenol complex with selenium(IV), which gives an absorption maximum at 332 nm. After transfer of the formed piazselenol complex into organic phase with n-hexane, the absorbance of the piazselenol complex was measured by a UV-Vis spectrophotometer. The effective parameters of the experimental conditions such as pH, formation time of the complex, amount of MOPDA, ionic strength, volume of sample and effects of diverse ions, were investigated. The detection limit of the proposed method was found to be 0.95 mu g/L Se(IV) (n = 14, 3 sigma). The method was successfully applied to tap water, sea water and wastewater samples from washings of flue gases with satisfactory results.