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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (13): 118-121.

所属专题： 烟草种植与生产

• 农学 农业基础科学 • 上一篇    下一篇

氢化物发生-原子荧光光谱法测定烟叶中镉的研究

蒋倩 王如海 孙晓丽 龚 华 孙玉芳 倪 俊   

  • 收稿日期:2009-12-09 修回日期:2010-01-04 出版日期:2010-07-05 发布日期:2010-07-05
  • 基金资助:

    中国科学院南京土壤研究所创新领域前沿项目

Study on the Determination of Cadmium in Tobacco by Hydride Generation - Atomic Fluorescence Spectrometry

  • Received:2009-12-09 Revised:2010-01-04 Online:2010-07-05 Published:2010-07-05

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摘要：

本研究采用HNO3-HClO4-H2O2体系湿法消解烟叶样，摸索出氢化物发生-原子荧光光谱法测定样品中镉(Cd)的最佳实验条件。这些条件包括：样品酸度、载流浓度、还原剂浓度、增敏剂浓度以及仪器设置最佳参数。结果显示：在所选择的最佳实验条件下，测定镉的检出限为0.0031 μg/L，线性范围为0.00-3.00 μg/L，样品测定变异系数小于3.0%，加标回收率为88.7%~99.5%。可见，本实验建立了氢化物发生-原子荧光光谱法测定烟叶中Cd的最佳测定方法，其结果准确可靠、稳定性及精密度较高。

关键词: 土壤, 土壤, 重金属污染, 植物修复

Abstract:

Tobacco samples were dissolved by HNO3-HClO4-H2O2. Then, the concentration of Cadmium(Cd) was determined by hydride generation-atomic fluorescence spectrometery (AFS) with the best experimental conditions and instrumental settings, including the concentrations of the acidity of samples, carrier flow, reducer, Co2+ and the best settings of AFS. Under the optimal experimental conditions, the detection limits of Cd is 0.0031 μg/L, and the linear scope is during 0.00 and 3.00 μg/L, and the C.V. of the sample is less than 3.0%, and the recovery rate is 88.7%~99.5%. Therefore, the method characterized by veracity, stabilization and high precision will be effective to determine Cd in Tobacco.