| Nafion修饰电极预富集-石墨炉原子吸收法测定痕量银的研究 |
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| 引用本文： | 金利通,徐今雅,钱静汝,仝威.Nafion修饰电极预富集-石墨炉原子吸收法测定痕量银的研究[J].分析测试学报,1992(2). |
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| 作者姓名： | 金利通 徐今雅 钱静汝 仝威 |
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| 作者单位： | 华东师范大学化学系
(金利通，徐今雅，钱静汝)，华东师范大学化学系(仝威) |
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| 基金项目： | 中科院长春应化所电分析化学开放研究实验室基金 |
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| 摘 要： | 本文报道了用Nafion修饰电极预富集-石墨炉原子吸收法测定痕量银的方法。采用不加电位的离子交换富集方法,将痕量银富集在Nafion修饰钨丝电极上,然后用石墨炉原子吸收法测定,检出限为0.04ng/ml,线性范围为0.08～12ng/ml,RDS为4.2%,回收率为88～100%。方法简便、灵敏,选择性好,适用于测定复杂体系中的痕量银。
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| 关 键 词： | 化学修饰电极 石墨炉原子吸收法 银 Nafion |
Nafion Modified Electrode Preconcentration-Graphite Furnace Atomic Absorption Spectroscopic Determination of Trace Silver |
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| Jin Litong,Xu Jinya,Qian Jingru,Tong Wei.Nafion Modified Electrode Preconcentration-Graphite Furnace Atomic Absorption Spectroscopic Determination of Trace Silver[J].Journal of Instrumental Analysis,1992(2). |
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| Authors: | Jin Litong Xu Jinya Qian Jingru Tong Wei |
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| Institution: | Jin Litong,Xu Jinya,Qian Jingru,Tong Wei Department of Chemistry,East China Normal University To whom the correspondence should ?e sent. |
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| Abstract: | A method for the determination of trace silver With a Nafion modified electrode preconcen-
tration-graphite furnace atomic absoption spectrometry is reported. Trace silver is preconcen-
trated onto the Nafion modified tungsten wire electrode by ion-exchange means without apply-
ing electrode potential. The following graphite furnace atomic absorption spectrometric determin-
ation of silver gives a detection limit of 0.04ng/ml, and a linear range of 0.08 to 12ng/ml.
The relative standard deviation is 4.2% and the recovery is 88-100%. This is a simple, sensi-
tive and selective method, especially suitable for the determination of trace silver in complica-
ted system. |
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| Keywords: | Chemically modified electrode Graphite furnace atomic absorption spectrometry Silver Nafion |
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