Comparison of atomic fluorescence spectrometry and wavelength dispersive X-ray fluorescence spectrometry for the determination of arsenic in soil at different concentrations
Water bath digestion atomic fluorescence spectrometry and X-ray fluorescence spectrome-try were used to analyze soil composition standard material GBW07457(GSS-28)samples and a batch of actual soil samples at the same time.The results of 10 tests of soil composition analysis standard GBW07457(GSS-28)samples were within the accuracy requirements;214 samples with arsenic content of 6.00mg/kg to 100mg/kg were analyzed in detail by comparison,and it was found that the consistency of the results of the two methods was relatively good.After the comparative analy-sis,the following suggestions were made:when the arsenic content in the samples is＞60.0mg/kg,which is beyond the curve range of the atomic fluorescence spectrometry,and the dilution of the sam-ples with high concentration will bring errors,then X-ray fluorescence spectrometry is preferred;when the arsenic content in the samples is from 6.00mg/kg to 60.0mg/kg,the two methods can be used,taking into account that the sample pre-treatment of X-ray fluorescence spectrometry is con-venient,and multiple parameters can be measured at the same time and the measurement efficiency is high,X-ray fluorescence spectrometry is recommended.
atomic fluorescence spectrometrywavelength dispersion X-ray fluorescence spectrome-trydifferent concentrations of arsenic in soilcomparison of analysis methods
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