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草甘膦(N—膦酸甲基甘氨酸)是一种高效低毒、低残留、广谱、传导性的萌后除草剂;它在橡胶等热带作物园中,已有相当的使用规模;关于草甘膦的测定,近期已有人用紫外分光光度法和快速化学滴定法做了定量实验;然而,关于它的气相色谱法分析,目前国内尚不见报导;本文就茅草中草甘膦残留量的气相色谱法分析,做扼要的介绍。一、测定原理茅草中的草甘膦经有机溶剂萃取纯化并浓缩定容之后,通过OV—17珂珞姆沙白色谱柱分离,进而在电子捕获检测器中定量测定。
Glyphosate (N-phosphonomethylglycine) is a highly efficient, low toxicity, low residue, broad spectrum, and conductive post-emergence herbicide; it has been used to a considerable extent in tropical crop gardens such as rubber; The determination of glyphosate has recently been done with UV spectrophotometry and rapid chemical titration quantitative experiments; However, its gas chromatography analysis, the current domestic yet to be reported; this glyphosate that grass residues Gas chromatography analysis, make a brief introduction. First, the determination principle Glyphosate in thatch grass purified by organic solvent extraction and concentration of fixed volume, through the OV-17 coloful sand column separation, and then in the electron capture detector quantitative determination.