DLLME-spectrophotometric determination of glyphosate residue in legumes

CETIN E., ŞAHAN S., ÜLGEN A., ŞAHİN U.

FOOD CHEMISTRY, cilt.230, ss.567-571, 2017 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 230
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.foodchem.2017.03.063
  • Dergi Adı: FOOD CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.567-571
  • Anahtar Kelimeler: Glyphosate, Dispersive liquid-liquid microextraction, Spectrophotometry, Legume samples, PERFORMANCE LIQUID-CHROMATOGRAPHY, ENVIRONMENTAL WATER SAMPLES, TANDEM MASS-SPECTROMETRY, GAS-CHROMATOGRAPHY, (AMINOMETHYL)PHOSPHONIC ACID, AMINOMETHYLPHOSPHONIC ACID, ION CHROMATOGRAPHY, DERIVATIZATION, PHOSPHATE, SOILS
  • Erciyes Üniversitesi Adresli: Evet

Özet

A new separation and pre-concentration method for spectrophotometric determination of glyphosate herbicide was developed. Glyphosate was converted into dithiocarbamic acid with CS2, followed by copper in the presence of ammonia to promote complex formation. This complex was collected in a CH2Cl2 organic drop and absorbance measured at 435 nm. The analytical parameters, such as the amount of NH3, Cu(II) and CS2, type of extraction solutions, and the ratio of dispersive and organic liquids were optimized. The calibration curve was linear in the range 0.5-10 mg l(-1). The limits of detection and quantification were calculated from 3 s to 10 s criterions as 0.21 mg l(-1) and 0.70 mg l(-1), respectively. The developed method was applied to legume samples with the satisfactory recovery values of 98 +/- 4-102 +/- 3%. (C) 2017 Elsevier Ltd. All rights reserved.