Comparison and Application of Determination Methods for Total Chromium Content in Water Quality
Compare the determination of total chromium content in water by inductively coupled plasma mass spectrometry,flame atomic absorption spectrophotometry,and ultraviolet spectrophotometry from the aspects of standard curve,detection limit,precision,and accuracy.The correlation coefficients of the standard curves for each method can reach 0.999,and the analysis results for certified standard substances are within the true value range;The detection limit of ICP-MS is 2.7 × 10-5 mg/L,the lower limit of determination is 1.08 × 10-4 mg/L,the precision is 1.3％to 1.9％,and the accuracy is 97.9％to 103.8％;The detection limit of F-AAS is 0.016 2 mg/L,the lower limit of determination is 0.064 8 mg/L,the precision is 0.6％to 4.1％,and the accuracy is 96.0％to 104.0％;The UV detection limit is 0.003 7 mg/L,the determination lower limit is 0.014 8 mg/L,the precision is 1.3％to 6.6％,and the accuracy is 95.0％to 102.0％.The results indicate that all three methods can accurately determine the total chromium content in water,and the appropriate method should be selected based on laboratory conditions and sample content.
water qualitytotal chromiuminductively coupled plasma mass spectrometryflame atomic absorption spectrophotometryUV spectrophotometrycomparative analysis
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