| 有机共沉淀分离富集原子吸收测定痕量镉 |
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| 引用本文： | 苏耀东,边永强,顾树春,倪亚明.有机共沉淀分离富集原子吸收测定痕量镉[J].同济大学学报(自然科学版),1992(2). |
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| 作者姓名： | 苏耀东 边永强 顾树春 倪亚明 |
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| 作者单位： | 同济大学化学系，同济大学微量元素研究所 |
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| 摘 要： | 采用APDC(吡咯烷二硫代氨基甲酸铵)-Cu(I)共沉淀体系,在pH3的条件下分离富集酱油消解液中的痕量镉,再用微量注射进样FAAS测定的方法。样品中镉的回收率在92—104％之间。对镉含量为0.59mg/1的样品12次平行测定的变异系数为5.1％。共存物质不干扰测定。溶液中镉的浓度在0—0.125mg/1范围内工作曲线呈线性。方法的灵敏度(标准曲线斜率)为1.079(mg/1)~(-1)。本法快速、简便、稳定。
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| 关 键 词： | 镉 原子光谱 富集技术 |
Determination of Trace Cadmium by FAAS after Organic Coprecipitation Separation |
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| Su Yaodong Bian Yongqiang Gu Suchen Ni Yaming.Determination of Trace Cadmium by FAAS after Organic Coprecipitation Separation[J].Journal of Tongji University(Natural Science),1992(2). |
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| Authors: | Su Yaodong Bian Yongqiang Gu Suchen Ni Yaming |
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| Institution: | DePartment of Chemistry |
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| Abstract: | Preconcentration and separation for Cd in soy, APDC as a precipitant and determination by FAAS have been studied. The calibration curve is linear in the range of 0-0.125mg/1 of Cd at pH3. No interference was observed caused by coexistent elements. The standard addition recovery of Cd is between 92-104%. The relative standard deviation of 12 repeated measurements is 5.1%. The method is rapid, simple and satisfactory in thedetermination of trace Cd in soy |
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| Keywords: | Cadmium Atomic absorption spectrometry Isolation method |
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