| 氢化物发生-原子荧光光谱法测定钢铁中的痕量铋 |
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| 引用本文： | 韩华云,刘佳,胥亚云,张西林.氢化物发生-原子荧光光谱法测定钢铁中的痕量铋[J].化学分析计量,2007,16(5):32-34. |
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| 作者姓名： | 韩华云 刘佳 胥亚云 张西林 |
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| 作者单位： | 郑州大学化学系,郑州,450052 |
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| 摘 要： | 采用氢化物发生-原子荧光光谱法测定钢铁中的痕量铋。考察了观察高度、负高压、灯电流、载气流速、屏蔽气流速、介质酸度、载流酸度和硼氢化钾浓度等因素对测定结果的的影响,并优化了测定条件,研究了钢铁材料中常见元素对铋测定的影响。结果表明,用硫脲和抗坏血酸作抑制剂可以消除大量元素的干扰。铋浓度在0～100ng/mL与荧光强度呈良好的线性关系,方法的检出限为0.187ng/g。对20ng/mL的铋标准溶液平行测定10次,相对标准偏差为2.5%。用该方法对国家标准钢样品进行了测定,测定结果与标准值相符合。
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| 关 键 词： | 氢化物发生-原子荧光光谱法 钢铁 铋 |
| 收稿时间： | 2007-07-19 |
| 修稿时间： | 2007年7月19日 |
DETERMINATION OF TRACE BISMUTH IN STEEL BY HYDRIDE GENERATION-ATOMIC FLUORESCENCE SPECTROMETRY |
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| Han Huayun,Liu Jia,Xu Yayun,Zhang Xilin.DETERMINATION OF TRACE BISMUTH IN STEEL BY HYDRIDE GENERATION-ATOMIC FLUORESCENCE SPECTROMETRY[J].Chemical Analysis And Meterage,2007,16(5):32-34. |
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| Authors: | Han Huayun Liu Jia Xu Yayun Zhang Xilin |
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| Institution: | Department of Chemistry,Zhengzhou University,Zhengzhou 450052,China |
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| Abstract: | A simple and fast analytical procedure for the determination of bismuth in steel by hydride generation atomic fluorescence spectrometry(HG-AFS) was developed. The influence of instrument parameters such as current of lamp,atomizer height,voltage of PMT,carrier gas rate,shield gas rate and concentration of HCl and KBH4 on the determination of bismuth were studied, and the optimized conditions were obtained. Interference of coexistent elements and methods to eliminate the interference were investigated in detail. The results showed that thiourea and ascorbic acid were the best occultation reagent. Under the optimized conditions, the linear range of bismuth was 0-100 ng/mL and the relative standard deviation was 2.5%(n=10) for 20 ng/mL Bi standard solution.The detection limit was 0.187 ng/g.The standard sample was determined by the method with satisfactory results . |
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| Keywords: | hydride generation fluorescence spectrometry steel bismuth |
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