| 冷蒸气发生原子吸收法测定烟草中镉和汞 |
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| 引用本文： | 石玮玮,淦五二,苏庆德.冷蒸气发生原子吸收法测定烟草中镉和汞[J].光谱学与光谱分析,2005,25(7):1135-1138. |
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| 作者姓名： | 石玮玮 淦五二 苏庆德 |
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| 作者单位： | 中国科学技术大学化学系,安徽,合肥,230026 |
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| 基金项目： | 国家烟草专卖局项目(110200302029)资助 |
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| 摘 要： | 采用硼氢化钾与镉和汞在雾化器喷口处反应生成原子蒸气,然后直接进入石英T形管中用原子吸收法测定。该方法减少了镉和汞的蒸气在水溶液和传输过程中的损失,提高了测定灵敏度和精密度。对各种实验参数进行了研究,镉和汞的检出限(K=3,n=11)分别为21和8ng·L-1。利用该方法成功测定了烟草样品中镉和汞,回收率均在92%以上。方法操作简单、快速、灵敏度好。
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| 关 键 词： | 原子吸收 冷蒸气发生 镉 汞 烟草 |
| 文章编号： | 1000-0593（2005）07-1135-04 |
| 收稿时间： | 2003-12-28 |
| 修稿时间： | 2003年12月28 |
Determination of Cadmium and Mercury in Tobacco Leaves Samples by CVAAS |
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| SHI Wei-wei,GAN Wu-er,SU Qing-de.Determination of Cadmium and Mercury in Tobacco Leaves Samples by CVAAS[J].Spectroscopy and Spectral Analysis,2005,25(7):1135-1138. |
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| Authors: | SHI Wei-wei GAN Wu-er SU Qing-de |
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| Institution: | Department of Chemistry, University of Science and Technology of China, Hefei 230026, China. |
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| Abstract: | A new and sensitive method for the determination of cadmium and mercury was developed using nebulous phase reaction, cold vapor atomic absorption spectrometry (CVAAS). This design effectively reduces the loss of cadmium and volatile mercury species in aqueous solution and transfer process. The effects of several experimental parameters of the proposed system were optimized. Using the optimized experimental conditions, detection limits of 21 and 8 ng x L(-1) with RSD of 3.2% and 2.9% (n = 11) were obtained for cadmium and mercury, respectively. This method has been successfully applied to the determination of cadmium and mercury in tobacco leaves samples with the recoveries over 92%. |
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| Keywords: | Atomic absorption spectrometry Cold vapor generation Cadmium Mercury Tobacco |
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