| 碳纤维电极在奶粉镉测定中的应用 |
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| 引用本文： | 杨秀茹.碳纤维电极在奶粉镉测定中的应用[J].高师理科学刊,2004,24(3):54-56. |
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| 作者姓名： | 杨秀茹 |
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| 作者单位： | 黑龙江省乳品工业技术开发中心,黑龙江,哈尔滨,150086 |
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| 摘 要： | 研究了碳纤维电极在奶粉镉测定中的应用 ,并进行了性能测试 .在 1 0 .0mg/LHg2 +— 0 .2 5mol/L盐酸溶液中测量镉 ,检测限达到 0 .0 2 0 μg/L(电富集 1 0min) ,用于测定奶粉中的镉含量 .标准加入回收率为 93.5 %,变异系数 (n =1 1 ) <8.3%.碳纤维电极的峰高均值为 2 68.5 7μA/V ,标准差为 3.2 5 6μA/V ,变异系数为 1 .2 1 3%.GC电极的峰高均值为 373.3μA/V ,标准差为 5 .7987μA/V ,变异系数为 1 .5 5 3%.碳纤维电极具有比GC电极更高的稳定性
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| 关 键 词： | 镉 奶粉 碳纤维 溶出伏安法 |
| 文章编号： | 1007-9831(2004)03-0054-02 |
| 修稿时间： | 2004年6月25日 |
Application in the determination of cadmium in dairy powder by carbon fiber electrode |
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| YANG Xiu-ru.Application in the determination of cadmium in dairy powder by carbon fiber electrode[J].Journal of Science of Teachers＇College and University,2004,24(3):54-56. |
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| Authors: | YANG Xiu-ru |
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| Abstract: | The Application in the determination of cadmium in dairy powder by carbon fiber electrode and capability testing were studied. The determination of cadmium in solution of 10.0 mg/L Hg 2+ ～0.25 mol/L hydrochloric acid with a test limit of 0.020 μg/L. The standard add recovery ratio was 93.5%,RSD was( n =11)<8.3%. carbon fiber electrode′s peak high was 268.57 μA/V,Standard deviation was 3.256 μA/V,RSD was1.213%. The GC electrode′s peak high was 373.3 μA/V,Standard deviation was 5.798 μA/V,RSD was1.553%. The carbon fiber electrode have a higher stability than GC electrode. |
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| Keywords: | cadmium dairy powder carbon fiber stripping voltammetry |
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