土壤中甲磺隆残留的气相色谱分析方法。

Gas chromatographic method for residue analysis of metsulfuron methyl from soil.

机构信息

Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi 110012, India.

出版信息

Bull Environ Contam Toxicol. 2011 Feb;86(2):149-51. doi: 10.1007/s00128-011-0190-6. Epub 2011 Jan 21.

Abstract

Gas chromatographic method has been developed for the determination of metsulfuron methyl residues from soil. Due to the thermal unstability of this herbicide and its mono methyl derivative, it was derivatized to a dimethyl derivative using diazomethane. Structure of the derivatized product was confirmed by GC-MS. Time for methylation reaction was standardized and 24 h was found to be the optimum time in ethylacetate solvent. Using this method, recovery of metsulfuron methyl from soil was above 70%. Limit of detection (LOD) and limit of quantification (LOQ) of the method were 0.1 μg mL⁻¹ and 0.2 μg g⁻¹ respectively.

摘要

建立了测定土壤中甲磺隆残留量的气相色谱方法。由于该除草剂及其单甲基衍生物热不稳定性，采用重氮甲烷将其衍生为二甲衍生物。通过 GC-MS 确认了衍生产物的结构。对甲硫隆甲基的甲基化反应时间进行了标准化，发现乙腈溶剂中 24 h 为最佳时间。采用该方法，甲磺隆甲基在土壤中的回收率大于 70%。该方法的检测限（LOD）和定量限（LOQ）分别为 0.1 μg·mL⁻¹和 0.2 μg·g⁻¹。