Comparison of different determination methods for arsenic in groundwater.

This article uses atomic fluorescence spectroscopy (AFS) and inductively coupled plasma mass spectrometry (ICP-MS) to determine arsenic in groundwater respectively. The AFS and ICP-MS methods have good homogeneity. Samples with different concentrations of groundwater were detected using both methods, and the samples were spiked into three different concentrations to calculate their recovery rates. The results show that both methods are within the reasonable range specified by the groundwater detection standards. The blind sample detection test shows that both methods have good precision and accuracy. In contrast, the pre-treatment process of AFS method is relatively complex, with more reagents prepared in the early stage. ICP-MS method is superior to AFS method in terms of correlation linearity, instrument precision and accuracy. When detecting arsenic in groundwater, ICP-MS method can use the collision mode of helium gas and the internal standard correction of Ge72, thus reducing the matrix interference of the sample and the mass spectrometry interference during the detection process, and increasing the accuracy of the detection results. At the same time, ICP-MS method has the advantages of easy operation, stabler instrument state, and more efficiency, and so is more suitable for the detection of large-scale groundwater samples and worthy of widespread promotion and application. [ABSTRACT FROM AUTHOR]