测定土壤、小麦籽粒和秸秆中乙硫甲威残留量的新型气相色谱法。

New gas chromatographic method for residue determination of dithiopyr in soil, wheat grain and straw.

作者信息

Saikia N, Kulshrestha G

机构信息

Division of Agricultural Chemicals, IARI, New Delhi, India.

出版信息

J Chromatogr A. 1999 Dec 24;864(2):351-3. doi: 10.1016/s0021-9673(99)01026-2.

DOI:10.1016/s0021-9673(99)01026-2

PMID:10669303

Abstract

A gas chromatographic method has been developed for a new pyridine herbicide, dithiopyr, utilising an electron capture detector. The method makes use of a column (10 m x 0.534 mm I.D.; 1 microm film thickness) containing HP-1 with nitrogen as a carrier gas at a flow rate of 15 ml min(-1) at temperatures of 190, 210, 270 degrees C for oven, injector port and detector, respectively. Soil, wheat grain and straw samples fortified with dithiopyr were extracted with acetone-0.2 M HCl (95:5) and cleaned up by partitioning with hexane. The technique has a sensitivity of 0.05 microg ml(-1) and the recovery of dithiopyr from soil, wheat grain and straw ranged between 80 and 99%.

摘要

已开发出一种利用电子捕获检测器测定新型吡啶类除草剂氟硫草定的气相色谱方法。该方法采用一根柱（内径10 m×0.534 mm；膜厚1微米），填充HP-1，以氮气作为载气，流速为15 ml min(-1)，柱箱、进样口和检测器的温度分别为190、210、270℃。用丙酮-0.2 M盐酸（95:5）对添加了氟硫草定的土壤、小麦籽粒和秸秆样品进行萃取，并用己烷分配法进行净化。该技术的灵敏度为0.05 μg ml(-1)，氟硫草定在土壤、小麦籽粒和秸秆中的回收率在80%至99%之间。