| 线性扫描伏安法测定食盐中碘含量 |
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| 引用本文： | 习霞,明亮.线性扫描伏安法测定食盐中碘含量[J].中国调味品,2012,37(4):100-102. |
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| 作者姓名： | 习霞 明亮 |
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| 作者单位： | 南通大学化学化工学院,江苏南通,226007 |
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| 基金项目： | 南通市应用研究科技计划项目，南通大学自然科学项目 |
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| 摘 要： | 以多壁碳纳米管(MWCNT)修饰玻碳电极为工作电极,研究了碘离子在该修饰电极上的伏安分析特性,建立了测定食盐中碘含量的线性扫描伏安法。在优化实验条件下,氧化峰电流与碘离子浓度在1.0×10-6～1.0×10-3 mol/L范围内呈良好的线性关系,检出限为4.0×10-7 mol/L。对1.0×10-4 mol/L碘化钾溶液平行测定10次的RSD为3.2%。将该方法用于测定加碘食盐中的碘含量,结果满意。
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| 关 键 词： | 碘离子 线性扫描伏安法 碳纳米管 化学修饰电极 |
Determination of iodine content in edible salt by linear sweep voltammetry |
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| XI Xia
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MING Liang.Determination of iodine content in edible salt by linear sweep voltammetry[J].China Condiment,2012,37(4):100-102. |
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| Authors: | XI Xia MING Liang |
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| Affiliation: | *(School of Chemistry and Chemical Engineering,Nantong University,Nantong 226007,China) |
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| Abstract: | The voltammetric characteristics of iodine ion at the multi-wall carbon nanotube(MWCNT) modified glassy carbon electrode(GCE) was investigated and a simple linear sweep voltammetry(LSV) method was developed for the determination of iodine content in edible salt.Under the optimized experimental conditions,the oxidation peak current varied linearly with the concentration of iodine ion over the range from 1.0×10-6 to 1.0×10-3 mol/L with a detection limit of 4.0×10-7 mol/L.RSD for 1.0×10-4 mol/L iodine ion was 3.2%(n=10).The proposed method has been used for the determination of iodine content in edible salt with satisfactory results. |
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| Keywords: | iodine ion linear sweep voltammetry carbon nanotube chemically modified electrode |
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