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.
关键词
水质/总铬/电感耦合等离子体质谱法/火焰原子吸收光度法/紫外分光光度法/对比分析
Key words
water quality/total chromium/inductively coupled plasma mass spectrometry/flame atomic absorption spectrophotometry/UV spectrophotometry/comparative analysis
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