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首页> 外文期刊>Fresenius' Journal of Analytical Chemistry >Study on the direct analysis of solid powder biological samples using fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry with PTFE slurry modifier
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Study on the direct analysis of solid powder biological samples using fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry with PTFE slurry modifier

机译：含氟助剂的氟化辅助电热汽化电感耦合等离子体原子发射光谱法直接分析固体粉末生物样品的研究

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摘要

A method has been described for the direct determination of Ti, Cu, Mn, Cr and Cd in solid biological samples without any chemical pretreatment by fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry (ETV-ICP-AES) with slurry sampling. A polytetrafluorethylene (PTFE) emulsion was used as a fluorinating reagent to promote the vaporization of the analytes from the graphite furnace. The interface between furnace device and ICP torch and the main factors affecting the analytical signal were investigated systematically. The detection limits for the determination of Ti, Cu, Mn, Cr and Cd are 6.3, 4.7, 10, 13 and 278 ng/mL, respectively; the relative standard deviations are in the range of (Mn) approx% (Cd) after optimization of the operating conditions. The recommended approach has been applied to directly determine the trace elements of interest in the Chinese traditional medicine Loulu and in the solid biological standard reference material (peach leaves, GBW 08501) with satisfactory results.
机译：已经描述了一种直接测定固体生物样品中Ti，Cu，Mn，Cr和Cd的方法，该方法无需任何化学预处理即可通过含浆液采样的氟化辅助电热汽化电感耦合等离子体原子发射光谱法（ETV-ICP-AES）进行。聚四氟乙烯（PTFE）乳液用作氟化试剂，以促进来自石墨炉的分析物的汽化。系统研究了炉膛装置与ICP炬管之间的界面以及影响分析信号的主要因素。测定Ti，Cu，Mn，Cr和Cd的检测限分别为6.3、4.7、10、13和278 ng / mL。优化操作条件后，相对标准偏差在（Mn）约％（Cd）的范围内。推荐的方法已直接应用于中药Loulu和固体生物标准参考物质（桃叶，GBW 08501）中感兴趣的痕量元素的测定，结果令人满意。

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