Speciation analysis of Cr (III) and Cr (VI) in drinking waters using anion exchange chromatography coupled to the Thermo Scientic iCAP Q ICP-MS

2019/06/24   下载量： 7 次

方案摘要

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应用领域 环保
检测样本 饮用水
检测项目 （类）金属及其化合物>铬(Cr)
参考标准 国家标准

Through the combination of the ICS-5000 ion chromatography system with the iCAP Qc ICP-MS, a sensitive, robust method for the speciation analysis of trace levels of Cr (III) and Cr (VI) in natural waters has been developed. The method developed enables fast and reliable speciation analysis of both Cr (III) and Cr (VI) species in water samples without prior incubation steps and with high purity nitric acid as mobile phase. The short, but highly ef?cient Dionex AG-7 column, provides complete separation of both species in under 150 s, enabling high sample throughput for the routine analysis of water samples.

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Daily working standards were prepared by diluting the appropriate quantity of commercially available stocksolutions (1000 µg/mL) of each chromium standard in a 

0.1 mol/L ammonium nitrate solution adjusted to a pH of 4.Drinking water was collected in a PFA bottle previouslyrinsed with high purity nitric acid. The water was analyzed directly without dilution or pH adjustment in order to keep the species unchanged before analysis.

Through the combination of the ICS-5000 ion chromatography system with the iCAP Qc ICP-MS, a sensitive, robust method for the speciation analysis of trace levels of Cr (III) and Cr (VI) in natural waters has been developed. The method developed enables fast and reliable speciation analysis of both Cr (III) and Cr (VI) species in water samples without prior incubation steps and with high purity nitric acid as mobile phase. The short, but highly efficient Dionex AG-7 column, provides complete separation of both species in under  150 s, enabling high sample throughput for the routine analysis of water samples.


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赛默飞色谱与质谱
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