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Influence of an internal standard in axial ICP OES analysis of trace elements in plant materials
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2019/12/04 , DOI: 10.1039/c9ja00372j Giuliana Drava 1, 2, 3, 4 , Vincenzo Minganti 1, 2, 3, 4
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2019/12/04 , DOI: 10.1039/c9ja00372j Giuliana Drava 1, 2, 3, 4 , Vincenzo Minganti 1, 2, 3, 4
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Internal standardization is a commonly used approach to deal with the problems posed by non-spectral interferences in inductively coupled plasma optical emission spectrometry (ICP OES). However, in many real cases, the application to routine analysis, e.g. of environmental samples, is still difficult and cumbersome. In this work the use of an internal standard (IS) was verified by determining 17 trace elements on 3 certified reference materials (CRMs) using 2 different ISs, Bi and Pt. The results were compared with those obtained without an IS. The elements certified (or reported as indicative values) are not the same in the 3 CRMs and their concentrations are different; however the matrices used are similar, all of them being plant samples, frequently used in studies of environmental biomonitoring. Nevertheless, significant differences in the accuracy and precision of the results obtained were observed, depending on the CRM and the element considered. In all cases, an improvement was obtained when the IS was added, with a better performance for Pt in comparison to Bi for most of the elements. Moreover, a significant effect of the energy of spectral lines on the quality of the measurements was observed: the greater the similarity between the analyte wavelength and that of the IS, the higher the accuracy of the measurements.
中文翻译：
内标对植物材料中微量元素的轴向ICP OES分析的影响
内部标准化是解决电感耦合等离子体发射光谱法（ICP OES）中非光谱干扰带来的问题的常用方法。但是，在许多实际情况下，它可以应用于例行分析，例如的环境样品仍然是困难而繁琐的。在这项工作中，通过使用2种不同的IS（铋和铂）确定3种认证参考材料（CRM）上的17种微量元素，验证了内标（IS）的使用。将结果与没有IS的结果进行比较。3种CRM中已认证（或报告为指示值）的元素不同，并且它们的浓度也不同；但是，所使用的基质是相似的，它们都是植物样品，经常用于环境生物监测研究中。然而，根据CRM和所考虑的因素，观察到的结果的准确性和精确度存在显着差异。在所有情况下，添加IS均获得了改善，与大多数元素中的Bi相比，Pt的性能更好。
更新日期：2020-02-13
中文翻译：
内标对植物材料中微量元素的轴向ICP OES分析的影响
内部标准化是解决电感耦合等离子体发射光谱法（ICP OES）中非光谱干扰带来的问题的常用方法。但是，在许多实际情况下，它可以应用于例行分析，例如的环境样品仍然是困难而繁琐的。在这项工作中，通过使用2种不同的IS（铋和铂）确定3种认证参考材料（CRM）上的17种微量元素，验证了内标（IS）的使用。将结果与没有IS的结果进行比较。3种CRM中已认证（或报告为指示值）的元素不同，并且它们的浓度也不同；但是，所使用的基质是相似的，它们都是植物样品，经常用于环境生物监测研究中。然而，根据CRM和所考虑的因素，观察到的结果的准确性和精确度存在显着差异。在所有情况下，添加IS均获得了改善，与大多数元素中的Bi相比，Pt的性能更好。
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