Determination of Chromium(Ⅵ) and Chromium(Ⅲ) Stripped from Stopcock by Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry

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Determination of Chromium(Ⅵ) and Chromium(Ⅲ) Stripped from Stopcock by Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry

- Determination of Chromium(Ⅵ) and Chromium(Ⅲ) Stripped from Stopcock by Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry
- Vol. 35, Issue 12, Pages: 1639-1642(2016)
- 作者机构：
  
  上海市质量监督检验技术研究院
- 作者简介：
- 基金信息：
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Determination of Chromium(Ⅵ) and Chromium(Ⅲ) Stripped from Stopcock by Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry. [J]. 35(12):1639-1642(2016)
DOI：

Determination of Chromium(Ⅵ) and Chromium(Ⅲ) Stripped from Stopcock by Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry. [J]. 35(12):1639-1642(2016) DOI：

摘要

采用硝酸和氨水体系为流动相,等度洗脱方式,建立了液相色谱-电感耦合等离子体质谱(LC-ICP-MS)同时测定水嘴浸泡液中超痕量六价铬和三价铬的方法。考察了不同pH值、质谱条件等因素对实验体系的影响，使用动态反应技术(DRC)消除离子干扰。通过优化实验，实现了六价铬和三价铬的分离，避免了高含量三价铬对低含量六价铬出峰的干扰。测得六价铬和三价铬的检出限分别为0.013，0.028 μg/L，线性范围分别0.02~10 μg/L和0.04~20 μg/L，加标回收率为76.0%~116.4%，相对标准偏差(RSD)分别为1.8%和2.8%。该方法样品用量小、检出限低、快速、准确，能够满足水嘴产品的检测需求。

Abstract

A liquid chromatography-inductively coupled plasma mass spectrometric(LC-ICP-MS) method was established for the determination of chromium(Ⅵ) and chromium(Ⅲ) stripped from stopcock.By investigating pH value,ICP-MS operation conditions and parameters,the detection limits of chromium(Ⅵ) and chromium(Ⅲ) were obtained to be 0.013 μg/L and 0.028 μg/L，respectively.Linear ranges of chromium(Ⅵ) and chromium(Ⅲ) were 0.02-10 μg/L and 0.04-20 μg/L，respectively.The spiked recoveries varied from 76.0% to 116.4%,with RSDs of 1.8%-2.8%.The method is fast and accurate,and has a low detection limit.It is suitable for the detection requirement of stopcock products.

关键词

液相色谱-电感耦合等离子体质谱法水嘴六价铬三价铬

Keywords

liquid chromatography-inductively coupled plasma mass spectrometry(LC-ICP-MS)stopcockchromium(Ⅵ)chromium(Ⅲ)

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