[用电热蒸发电感耦合等离子体发射光谱法直接分析烟草中的微量元素]

[Direct analysis of trace elements in tobacco using electrothermal vaporization ICP-AES].

作者信息

Chen Shi-zhong

机构信息

Key Laboratory, Wuhan Polytechnic University, Wuhan 430023, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2003 Apr;23(2):358-60.

PMID:12961895

Abstract

A method for direct analysis of trace elements (Cu, Fe, Al, Cr and Mn) in tobacco by slurry sampling electrothermal vaporization (ETV) ICP-AES using polytetrafluoroethylene (PTFE) emulsion as a chemical modifier was described. The main factors affecting the analytical signals were studied. The detection limits of this method for the determination of the interesting elements were in the range of 3.8 ng.mL-1 (Cu) to 13 ng.mL-1 (Fe), and the relative standard deviations (RSD) varied from 2.5% (Cu) to 5.7% (Cr) with the recoveries of 91.0%-112%.

摘要

描述了一种使用聚四氟乙烯（PTFE）乳液作为化学改性剂，通过悬浮液进样电热蒸发（ETV）电感耦合等离子体发射光谱法（ICP - AES）直接分析烟草中微量元素（铜、铁、铝、铬和锰）的方法。研究了影响分析信号的主要因素。该方法测定这些感兴趣元素的检出限在3.8 ng·mL⁻¹（铜）至13 ng·mL⁻¹（铁）范围内，相对标准偏差（RSD）在2.5%（铜）至5.7%（铬）之间，回收率为91.0% - 112%。