Determination of trace elements in fuel ethanol by ICP-MS using direct sample introduction by a microconcentric nebulizer
Determination of trace elements in fuel ethanol by ICP-MS using direct sample introduction by a microconcentric nebulizer
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DOI：
10.1039/b804328k
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发表时间：
2008-08
影响因子：
3.4
通讯作者：
L. Tormen;E. Chaves;T. Saint’Pierre;V. L. A. Frescura;A. J. Curtius
中科院分区：
文献类型：
--
作者：
L. Tormen;E. Chaves;T. Saint’Pierre;V. L. A. Frescura;A. J. Curtius
建议在电感耦合等离子体质谱中使用微同心雾化器，以允许乙醇溶液的引入。气体流量大，射频功率低，干扰小，灵敏度高。可以引入高达70%v/v乙醇的解决方案。乙醇提高了雾化效率和传输，对大多数研究的分析物来说，灵敏度增加了15-25。外部校准允许较低的检测下限，足以进行燃料乙醇分析。用同位素稀释法测定的铜、镉、镍、铅、铊、锡的含量与外标法测定的结果一致。该方法具有较高的精密度，外标的RSD在1%~9%之间，回收率试验表明该方法具有较高的准确度。
The use of a microconcentric nebulizer in ICP-MS is proposed to allow the introduction of ethanol solutions. High gas flow rate and low RF power led to less interference and high sensitivity. It was possible to introduce solutions with up to 70% v/v ethanol. The ethanol increases the nebulization efficiency and transport, with a sensibility gain between 15 and 25 for most studied analytes. External calibration allowed low detection limits, adequate for fuel ethanol analysis. The Cu, Cd, Ni, Pb, Tl and Sn concentrations determined by isotope dilution were in accordance with those by external calibration. The precision was adequate, with RSD from 1 to 9% using external calibration with IS, and the recovery test showed the accuracy of the proposed method.