کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4573898 | 1629503 | 2012 | 5 صفحه PDF | دانلود رایگان |
This article presents a simple, fast and low cost UV–vis spectrophotometric method to quantify glyphosate. This method can be used to perform adsorption isotherms on soils and metal oxides. It comprises a derivatization step and further measurement of the absorbance at 265 nm. The trueness of the results is validated using Ultra Performance Liquid Chromatography with tandem mass spectrometry detection (UPLC-MS/MS) as a reference method. The proposed spectrophotometric method is able to quantify glyphosate in the concentration range from 0.084 to 21.8 mg L− 1. This range is suitable to construct reliable adsorption isotherms. Examples of adsorption isotherms on goethite at pH 4.5 and a soil sample at pH 4.5, 6.0 and 8.0 are given. Interferences caused by dissolved organic matter can be corrected at least up to an organic matter concentration of 12 mg L− 1.
► A rapid, simple and low cost method to quantify glyphosate is presented.
► It involves a derivatization step and further absorbance measurement at 265 nm.
► It was validated using UPLC-MS/MS as a reference method.
► It allows to obtain reliable adsorption isotherms onto soils and goethite.
Journal: Geoderma - Volume 170, 15 January 2012, Pages 154–158