Study on different test methods of arsenic and mercury in groundwater
The determination of arsenic and mercury in groundwater by AFS,ICP-MS and ICP-OES was studied in this paper.The results show that the standard curves of the three testing methods are linear in a certain concentration range,and the correlation coefficients are all above 0.999.The recovery and precision are good,and the quality control results are all within the theoretical range,indicating that the three methods have good accuracy and stability,and the analytical data are reliable.The limits of arsenic detection by AFS and ICP-MS are 0.10 μg·L-1 and 0.02 μg·L-1,respectively,and the limits of mercury detection are 0.03 μg·L-1 and 0.05 μg·L-1,respectively,which are far below the limits of relevant water quality standards and the limits of Class I water stipulated in Groundwater Quality Standards,and can satisfy the requirements of groundwater testing.The detection limits of arsenic and mercury by ICP-OES method are 20 μg·L-1 and 9.36 μg·L-1,respectively,can be used for the detection of contaminated groundwater samples.
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