Simultaneous determination of chromium(hexavalent),glyphosate,perchlorate and 7 anions content in drinking water by ion chromatography
An ion chromatography method for simultaneous determination of trace chromium(hexavalent),glyphosate(GLY),perchlorate and 7 con-ventional anions(F-,Cl-,NO2-,Br,NO3-,SO42-,PO43)in drinking water by optimizing chromatographic conditions and methodological investigation was established,and the 10 targets in drinking water was determined.The results showed that the optimized chromatographic conditions were:Dionex IonPacTMAS20 as analytical column,Dionex IonPacTMAG20 as protection column,KOH as eluent,gradient elution,flow rate 1.0 ml/min,suppressor ADRS600(4 mm),suppression current 138 mA,column temperature 30 ℃,detector temperature 35 ℃,and sample volume 500 μL.Trace chromium(hexavalent),GLY,perchlorate and 7 conventional anions had good linear relationships in their respective linear ranges(R2＞0.999).The limits of de-tection(LOD)and limits of quantification(LOQ)of each substance were 0.079-1.145 μg/L and 0.263-3.817 μg/L.The resolution between each sub-stance was＞1.5.The relative standard deviation(RSD)of the reproducibility and stability test results were both ≤ 3.38％.The spiked recovery rate tests with drinking water as the substrate,the average recovery rates of each substance were 90.0％-99.3％,and the RSD of spiked recovery rate and preci-sion tests were 0.67％-4.33％and 0.12％-3.33％,respectively.In summary,the method was suitable for simultaneous determination of trace chromium(hexavalent),GLY,perchlorate and 7 common anions in drinking water.
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维普
