离子色谱法测定灭多威中的盐酸羟胺

建立了离子色谱-柱后衍生测定灭多威中痕量盐酸羟胺的新方法。样品经净化后,采用Ion Pac CS16离子交换色谱柱、安培检测器检测,外标法定量。结果表明:盐酸羟胺在0.02~1.0 mg/L质量浓度范围内,线性关系良好,线性相关系数为0.999 8。方法回收率为95.3%~98.1%,相对标准偏差均小于3%。检出限(信噪比3)为2.5μg/L。该方法简便,灵敏度高,无杂质干扰,前处理简便,可用于灭多威中痕量盐酸羟胺的测定。

Determination of Hydroxylamine Hydrochloride in Methomyl by Ion Chromatography

An ion chromatographic method for determining of hydroxylamine hydrochloride in methomyl was developed with post-column derivation and ampere detector. The sample was cleanuped, separated on an analytical column IonPac CS16, then analysed by external standard method. The results showed that at the concentration of 0.02-1.0 mg/L, the calibration curves were linear with the correlation coefficient of 0.999 8. The recoveries of the method were 95.3%-98.1% with the related standard deviations less than 3%. The detection limit was 2.5μg/L for hydroxylamine hydrochloride. The method was simple, effective, sensitive and selective. It was suitable for the determination of hydroxylamine hydrochloride in methomyl.