利用DMA-80直接测汞仪,建立食品中总汞的快速测定方法。食品置于样品舟中,无需前处理直接测定其总汞含量。结果表明,本法在0~100 ng范围内呈良好线性关系,加标回收率为96.3%~108.6%,精密度为3.32%,检出限为0.4μg/kg。分析菠菜和圆白菜标准物质,检测结果准确可靠。本法检出限低,回收率高,精密度好,操作简便,适用于食品中总汞含量的准确快速测定。 Direct determination of total mercury in food by DMA-80 direct mercury analyzer. Food placed in the sample boat, without the need for direct determination of the total mercury content. The results showed that this method showed a good linearity in the range of 0 ~ 100 ng, the recoveries were 96.3% -108.6%, the precision was 3.32%, and the detection limit was 0.4μg / kg. Analysis of spinach and cabbage standard material, the test results are accurate and reliable. This method has the advantages of low detection limit, high recovery rate, good precision and easy operation. It is suitable for the accurate and rapid determination of total mercury in food.