悬浮液进样流动注射在线微波消解-冷蒸气原子荧光光谱法测定生物和环境样品中的汞

Slurry Sampling Flow Injection-Microwave Digestion with Cold Vapor Generation-Atomic Fluorescence Detection for the Determination of Mercury in Biological and Environmental Samples

建立了悬浮液进样流动注射在线微波消解 冷蒸气原子荧光光谱法测定生物和环境样品中Hg的方 法。样品分散在50%(V/V)王水中,通过磁力搅拌保证样品溶液的均一性与稳定性。方法的检出限为 0.06μg/L。方法简单快速,灵敏度高,样品损失少,而且没有样品交叉污染。应用此方法测定了5种标准参 考物质以及5个实际样品中的Hg含量,并与传统的高压焖罐强酸消解方法进行了比较,两种方法所得结果 一致,标准参考物质的测定值与标准值很好地吻合。

The method of slurry sampling flow injection-microwave digestion with cold vapor generation-atomic fluorescence detection for the determination of mercury in biological and environmental samples is proposed. Samples were dispersed in 50% (V/V) aqua regia and agitated magnetically to obtain well-proportioned and stable sample solutions. The detection limit of the method was 0.06 mu g/L, with the advantage of simple, quick, sensitive, low losing and no cross-contamination. The slurry sampling technique was compared with the conventional high-pressure strong acids digestion method. Good consistent was got with the two methods and the obtained values were in good agreement with the certified values.