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| 萃取富集-火焰原子吸收光谱法测定食品中痕量银 | |
| 引用本文： | 吴江峰,韩瑜,张聪,韩华云.萃取富集-火焰原子吸收光谱法测定食品中痕量银[J].化学分析计量,2011,20(3):57-59. |
| 作者姓名： | 吴江峰 韩瑜 张聪 韩华云 |
| 作者单位： | 1. 河南省安全科学技术研究院,郑州,450004 2. 中原环保股份有限公司,郑州,450046 3. 郑州大学分析测试中心,郑州,450052 |
| 摘 要： | 建立了萃取富集-火焰原子吸收法测定食品中痕量银的新方法.在硫氰酸钾、十六烷基三甲基溴化铵和氯化钠溶液体系中,银离子能被定量萃取到乙酸乙酯中,从而起到富集作用,取乙酸乙酯于火焰原子吸收光谱仪测定其中的银元素含量,提高了测定灵敏度和选择性.结果显示:银在0-200ng/mL内线性良好,r=0.999 3,测定银的灵敏度(特... |
| 关 键 词： | 富集 食品 火焰原子吸收光谱法 银 |
DETERMINATION OF TRACE SILVER IN FOOD BY EXTRACTION-FLAME ATOMIC ABSORPTION SPECTROMETRY |
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| Wu Jiangfeng,Han Yu,Zhang Cong,Han Huayun.DETERMINATION OF TRACE SILVER IN FOOD BY EXTRACTION-FLAME ATOMIC ABSORPTION SPECTROMETRY[J].Chemical Analysis And Meterage,2011,20(3):57-59. | |
| Authors: | Wu Jiangfeng Han Yu Zhang Cong Han Huayun |
| Affiliation: | Wu Jiangfeng,Han Yu (Henan Academy Of Safety Science and Technology,Zhengzhou 450004,China) Zhang Cong (Zhongyuan Environmental Protection Co.Ltd.,China) Han Huayun (Center of Analysis & Testing,Zhengzhou University,Zhengzhou 450052,China) |
| Abstract: | A new method for determination of trace silver in food by extraction - flame atomic absorption spectrometry was developed. The silver was extracted by using ethyl acetate as extraction agent in potassium rhodanate - hexadecyl trimethyl ammonium bromide - sodium chloride solution system, and the organic phase was injected in FAAS. The sensitivity and selectivity of determination of silver was improved. The linear range was 0 - 200 ng/mL, the linear coefficient was 0. 999 3. The sensitivity was 5.30 × 10^-3 μg · mL^-1/1% , and the detection limit was 1.37 ng/mL. The relative standard deviation was 1.3% - 3.5% （ n = 10）. Most coexistent elements did not interfere with the determination of silver. The recovery was 91.0% - 104.0%. |
| Keywords: | concentrate food FAAS silver |
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