| 浓硝酸中痕量阴离子的测定 |
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| 引用本文： | 张笑昱,薛民杰,朱丽娜,刘莉.浓硝酸中痕量阴离子的测定[J].上海计量测试,2009,36(3):19-21. |
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| 作者姓名： | 张笑昱 薛民杰 朱丽娜 刘莉 |
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| 作者单位： | 上海市计量测试技术研究院 |
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| 摘 要： | 目的：提出了一种用离子色谱测定浓硝酸组分及含量的方法。方法：采用MIC-7型离子色谱仪，METROSEP A Supp 16高容量阴离子分离柱；25mmol NaOH＋3mmol Na2CO3的淋洗液；进样体积10μL;流速0.8mL/min,F^-和Cl^-的保留时间分别为4.8min和7.0min。结果：三点标准曲线线性相关性良好，相关系数为0.99968和0.99979，3次重复进样结果表明此法测定F^-,Cl^-的相对标准偏差分别为1.1%和0.1%。讨论：可以实现F^-和Cl^-在大量硝酸基体下的完全分离。
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| 关 键 词： | 离子色谱 浓硝酸 痕量阴离子 |
Detemination of trace anion in concentrated nitric |
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| Zhang Xiaomin,Xue Minjie,Zhu Lina,Liu Li.Detemination of trace anion in concentrated nitric[J].Shanghai Meassurement and Testing,2009,36(3):19-21. |
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| Authors: | Zhang Xiaomin Xue Minjie Zhu Lina Liu Li |
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| Affiliation: | (Shanghai lnstitue of Measurement and Testing Technology, China) |
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| Abstract: | A method of determination for the composition and concentration of concentrated nitric acid. Using METROSEP A Supp 16 High-capacity anion column of the MIC-7 ion chromatography. The eluent is 25 mM NaOH＋3mM Na2CO3, injection volume is 10 μL, velocity is 0.8 mL/min, the retention time of F^- and Cl^- are 4.8 min and 7.0 min. A linear correlation of three-point standard curve is good, the correlation coefficient are 0.99968 and 0.99979, sample results of three repeat showed that the relative standard deviation of F^- and Cl^- are 1.1% and 0.1%. F^- and Cl^- can be separated completely in a lot of concentrated nitric acid. |
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| Keywords: | ion chromatography concentrated nitric acid trace anion |
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