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 concentra-tions to calculate their recovery rates. The results show that both methods are within the reasonable range specified by the ground-water 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 groundwa-ter, ICP-MS method can use the collision mode of helium gas and the internal standard correction of Ge72, thus reducing the ma-trix 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 promo-tion and application.
groundwaterarsenicatomic fluorescence spectrometryinductively coupled plasma mass spectrometry
万方数据
维普
