全自动甲基汞分析仪测定水和废水中甲基汞

建立了全自动甲基汞分析仪测定水和废水中甲基汞的方法,对较清洁的地表水和一般废水样品可直接衍生化测定,对基体复杂水样则需蒸馏后再衍生化测定。该法在水样中甲基汞含量为0~1 000 pg范围内线性良好,相关系数r为0.999 7,检出限为0.002 ng/L,标准参考物质测定结果均在参考值范围内,相对标准偏差为1.1%,加标回收率为83.2%~96.6%。该法适用于水及废水中甲基汞的检测。

Determination of Methyl Mercury in Surface Water and Waste Water Using Fully Automatic Analyzer

This paper sets up a method to determine methyl mercury in surface water and waste water by fully -automatic analyzer . Clean surface water and general waste water can be directly measured after derivatization , while water samples containing complex matrices should be distilled before derivatization and measurement .Standard working curve linearity of methyl mercury was good when the content ranged from 0 to 1 000 pg,with correlation coefficients 0.999 7.The instrument detection limit of methyl mercury could achieve 0.002 ng/L.The determined results of standard references were all in the range of reference values .The relative standard deviation was 1.1%.The recoveries of methyl mercury were 83.2%~96.6%.This method was suitable for the determi-nation of methyl mercury in surface water and waste water .