离子色谱法检测饮用水中的草甘膦

Determination of Glyphosate in Drinking Water by Ion Chromatography

摘要: 建立了离子色谱法直接测定饮用水中草甘膦的分析方法。水样加入抗坏血酸除去余氯,微孔滤膜过滤后直接进样测定。用IonPac AS11-HC阴离子交换柱为分析柱,淋洗液为20 mmol/L KOH溶液,流速为1.00 mL/min,进样量100 μL进行检测。方法的线性范围0~1.5 mg/L,检出限为0.1 mg/L,加标回收率为95%~106%,相对标准偏差为5.08%~7.09%。方法操作简便快捷,灵敏度高,结果准确可靠。

Abstract: A method for determination of glyphosate in water by ion chromatography was established in this paper. After removed residual chlorine by adding ascorbic acid and filtrated by micropore filtrer membrance, the water samples were directly injected into IC. The separation was carried out on IonPac AS11-HC anion-exchange column and the eluent was 20 mmol/L KOH at flow rate of 1.00 mL/min. The injection volume was 100 μL. The linearity of the method is from 0 to 1.5 mg/L. The detection limit was 0.1 mg/L. The recoveries were from 95% to 106%, and RSD was from 5.08% to 7.09%. The experiments verified that the method was simple, sensitive, and accurate.