提高环境水中纳克级超痕量汞测定灵敏度的研究

Research on Raising the Ultra trace Analytical Sensitivity of Mercury in Environmental Water on the Nanogram Level.

对ｎｇ／Ｌ级超痕量汞测定中的消解、测定各步骤对灵敏度的影响进行了研究。得出结论：采用高纯氩气作载、屏气，选择高负压值和高扩展倍率能明显提高灵敏度；选择合适的消解时间和缩短测定时间能使灵敏度略有提高；试剂和玻璃器皿所带给空白的痕量汞对提高灵敏度不利，应作除汞处理。

The nanogram level ultra trace analysis of mercury in water is affected by the different steps of disple and determination.Research on it and draw a conclution:Using the high purity argon as the carrying and shielded gas,adopting the high negative voltage and the high extensive multiple,can raise the sensitivity notably.Selecting the dispel time suitably and shortening the determination time probably can raise the sensitivity slightly.The trace mercury from the reagent and glass appliance has a unfavourable influence in raising the sensitivity.Must eliminate it.