| 原子吸收光谱法测定烟草中铅镉 |
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| 引用本文： | 梁敏仪,张凌芳,冯才敏,吴细斌,刘祥军.原子吸收光谱法测定烟草中铅镉[J].顺德职业技术学院学报,2012,10(2):1-4. |
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| 作者姓名： | 梁敏仪 张凌芳 冯才敏 吴细斌 刘祥军 |
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| 作者单位： | 1. 顺德职业技术学院应用化工技术系,广东佛山,528333
2. 广州机械科学研究院有限公司,广东广州,510700 |
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| 摘 要： | 采用硝酸-过氧化氢-氢氟酸混合酸微波消解法消解烟丝样品,以NH4H2PO4为改进剂,氘灯背景校正横向加热石墨炉原子吸收光谱仪测定铅、镉。方法测试铅、镉的检出限分别为0.735、0.041μg/L,回收率分别为98.81%、92.47%,铅质量浓度范围为3.5～40.0μg/L,镉为0.12～5.0μg/L时相关系数r分别为0.9976、0.9966。方法具有简单、快速、实用性好的优点,可用于实际烟草中铅、镉的测定,结果良好。
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| 关 键 词： | 铅 镉 烟草 原子吸收光谱 |
Determination of Lead and Cadmium in Tobacco by Atomic Absorption Spectrometry |
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| Authors: | LIANG Min-yi ZHANG Ling-fang FENG Cai-min WU Xi-bin LIU Xiang-jun |
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| Institution: | 1(1.Department of Applied Chemic Engineering,Shunde Polytechnic,Foshan Guangdong 528333; 2.Guangzhou Mechanical Engineering Research Institute,Guangzhou Guangdong 510700,China) |
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| Abstract: | A mixed acid composed with nitric acid,hydrogen peroxide and hydrofluoric acid was used to digest tobacco assisted by a microwave digestion system.Lead and cadmium were quantitative determined by transversely heated graphite furnace atomic absorption spectrometry with a deuterium lamp background adjustment system after adding NH4H2PO4 as matrix modifier.This method has good linear relation at the density range of lead 3.5 g/L to 5.0 g/L.Correlation coefficient were 0.997 6 and 0.996 6 respectively.The determination limit were 0.735 g/L and 0.041 g/L,and the recovery coefficient was 98.81% and 92.47%.The established method suitable for routine determination of lead and cadmium in tobacco was proved simple,sensitive and accurate. |
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| Keywords: | lead cadmium tobacco atomic absorption spectrometry |
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