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砷和汞都是具有蓄积作用的有毒有害元素，在饮用水卫生监督领域和涉水产品卫生评价中都列为重要的监督项目，汞的ＧＢ５７５０—８５国标法冷原子吸收法是建立在７０年代生产的测汞仪基础上，现有的仪器型号已淘汰且不稳定，双硫腙法操作繁琐，砷的国标法有砷斑法为半定量，银
Arsenic and mercury are all toxic and harmful elements that have an accumulation effect. They are both listed as important supervision items in the field of sanitary supervision of drinking water and sanitary evaluation of wading products. The GB5750-85 GB / TASA was established in the 1970s On the basis of the mercury analyzer produced, the existing instrument models have been eliminated and unstable, the operation of the dithizone method is cumbersome, the arsenic GB method has the semi-quantitative method of arsenic stain, the silver