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Preparation of a reference material for crude oil trace elements: study of homogeneity and stability
Microchemical Journal ( IF 4.9 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.microc.2020.104799
Thábita Thiciana Bastos Marchezi , Luiza Valli Vieira , Rodrigo C. de Sena , Eustáquio Vinicius Ribeiro de Castro , Geisamanda Pedrini Brandão , Maria Tereza Weitzel Dias Carneiro

Abstract Trace elements can be found naturally in crude oil or can be added during the production process, transport, or storage. Due to the complexity of the determination of trace elements in crude oil, which is mainly accomplished using multi-element techniques, many reports have been published describing the optimization of instrumental parameters, the development of procedures for sample preparation, and new sample introduction devices. The goal of such research is to improve the sensitivity, precision, and accuracy of the measurements. In all the cases mentioned above, the use of reference materials (RMs) and certified reference materials (CRMs) is recommended to verify the accuracy of the new methods proposed. This paper describes the development of a natural-matrix reference material for quantification of vanadium, nickel, magnesium, sodium, calcium, strontium, and barium in crude oil. 3 kg of crude oil was processed and distributed into 115 units, each containing 20 g. The homogeneity and stability of the prepared reference material were investigated using atomic absorption spectrometry (AAS), inductively coupled plasma optical emission spectrometry (ICP OES), and inductively coupled plasma mass spectrometry (ICP-MS) techniques. The results were evaluated using standard univariate analysis of variance (ANOVA), regression analysis, and principal component analysis (PCA). Statistical evaluation of the data showed good homogeneity and stability of the candidate reference material under the conditions studied.

中文翻译:

原油微量元素标准物质的制备:均匀性和稳定性研究

摘要 微量元素可以天然存在于原油中,也可以在生产过程、运输或储存过程中添加。由于原油中痕量元素测定的复杂性,主要使用多元素技术来完成,因此已经发表了许多报告,描述了仪器参数的优化、样品制备程序的开发以及新的样品引入装置。此类研究的目标是提高测量的灵敏度、精确度和准确度。在上述所有情况下,建议使用标准物质 (RM) 和有证标准物质 (CRM) 来验证提出的新方法的准确性。本文介绍了用于定量分析钒、镍、镁、原油中的钠、钙、锶和钡。3 公斤原油被加工并分配到 115 个单位,每个单位含有 20 克。使用原子吸收光谱法 (AAS)、电感耦合等离子体发射光谱法 (ICP OES) 和电感耦合等离子体质谱法 (ICP-MS) 技术研究了制备的参考材料的均匀性和稳定性。使用标准单变量方差分析 (ANOVA)、回归分析和主成分分析 (PCA) 评估结果。数据的统计评估表明,候选参考物质在研究条件下具有良好的均匀性和稳定性。使用原子吸收光谱法 (AAS)、电感耦合等离子体发射光谱法 (ICP OES) 和电感耦合等离子体质谱法 (ICP-MS) 技术研究制备的参考材料的均匀性和稳定性。使用标准单变量方差分析 (ANOVA)、回归分析和主成分分析 (PCA) 评估结果。数据的统计评估表明,候选参考物质在研究条件下具有良好的均匀性和稳定性。使用原子吸收光谱法 (AAS)、电感耦合等离子体发射光谱法 (ICP OES) 和电感耦合等离子体质谱法 (ICP-MS) 技术研究制备的参考材料的均匀性和稳定性。使用标准单变量方差分析 (ANOVA)、回归分析和主成分分析 (PCA) 评估结果。数据的统计评估表明,候选参考物质在研究条件下具有良好的均匀性和稳定性。回归分析和主成分分析 (PCA)。数据的统计评估表明,候选参考物质在研究条件下具有良好的均匀性和稳定性。回归分析和主成分分析 (PCA)。数据的统计评估表明,候选参考物质在研究条件下具有良好的均匀性和稳定性。
更新日期:2020-06-01
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