| 氟离子选择电极法测定白菜中氟化物 |
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| 引用本文： | 吴红,焦九英,蒋松钰,王红莉.氟离子选择电极法测定白菜中氟化物[J].河南科学,2013(4). |
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| 作者姓名： | 吴红 焦九英 蒋松钰 王红莉 |
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| 作者单位： | 1. 郑州市环境保护监测中心站,郑州 450007
2. 郑州市宇驰检测技术有限公司,郑州 450009 |
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| 摘 要： | 本法用硝酸-双氧水消解烘干后的白菜,以柠檬酸钠溶液作离子强度缓冲调节剂并采用氟离子选择电极在pH 5~6时直接测定游离态氟离子浓度.方法标准偏差≤0.16,变异系数<5.44%,平均回收率为102.62%.
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| 关 键 词： | 氟化物 白菜 氟离子选择电极 硝酸-双氧水消解 |
Determination of Fluoride in Cabbage By Fluorine Oion Selective Electrode |
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| Abstract: | In this work,the cabbage was digested by nitric acid-hydrogen peroxide firstly.Then,sodium citrate solution was used as the buffer to regulate the ionic strength.Finally,free f luoride ion concentration was determined by f luorine ion selective electrode at pH 5~6.Standard deviation was 0.16,coefficient of variation was 5.44%,and average recovery was 102.62%. |
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| Keywords: | fluoride cabbage fluorine ion selective electrode nitric acid-hydrogen peroxide digestion |
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