Evaluation of a New Optic-Enabled Portable XRF Instrument for Measuring Toxic Metals/Metalloids in Consumer Goods and Cultural Products.
Evaluation of a New Optic-Enabled Portable XRF Instrument for Measuring Toxic Metals/Metalloids in Consumer Goods and Cultural Products.
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DOI：
10.1016/j.sab.2016.03.010
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发表时间：
2016-08-01
期刊：
影响因子：
--
通讯作者：
Parsons PJ
中科院分区：
文献类型：
--
作者：
Guimarães D;Praamsma ML;Parsons PJ
x射线荧光光谱法（XRF）是一种快速、无损的多元素分析技术，用于测定从百分比到µg/g水平的元素含量。尽管与其他基于实验室的方法（如电感耦合等离子体质谱法（ICP-MS）， icp -光学发射光谱法（OES）和原子吸收光谱法（AAS））相比，XRF的检测限要高得多，但其便携性和易用性使其成为一种有价值的工具，特别是用于现场研究。在进行现场分析的同时，越来越需要监测人体接触消费品、文化产品、食品和其他样品类型中的有毒金属和类金属，这导致了便携式XRF技术的几项重要发展。在这项研究中，一种基于双弯曲晶体光学（HD Mobile®）的新型便携式XRF分析仪用于检测许多亚洲社区使用的食品，药品，化妆品和香料中的有毒元素。研究了HD Mobile®的两种模型（预生产和最终生产单元）。性能参数包括准确度、精密度和检出限在实验室环境下使用标准物质（crm）和标准溶液进行表征。对于具有公共卫生意义的关键元素，如砷、镉、汞和铅，预生产模型的偏差估计为- 10%至11%，最终生产模型的偏差估计为- 14%至16%。使用两种XRF仪器分析了包括草药产品、民族香料和化妆品在内的5种存档公共卫生样品。对于这四个关键元素，预生产模型和最终生产模型之间有很好的一致性，这样，数据被判断为适合大多数样本分析的目的。使用HD Mobile®检测感兴趣的四个关键元素，使用存档样品确认，其中ICP-OES数据基于消化的样品材料。HD Mobile®XRF单元被证明适用于现场研究中可能遇到的样品的快速筛选。
X-ray fluorescence spectrometry (XRF) is a rapid, non-destructive multi-elemental analytical technique used for determining elemental contents ranging from percent down to the µg/g level. Although detection limits are much higher for XRF compared to other laboratory-based methods, such as inductively coupled plasma mass spectrometry (ICP-MS), ICP-optical emission spectrometry (OES) and atomic absorption spectrometry (AAS), its portability and ease of use make it a valuable tool, especially for field-based studies. A growing necessity to monitor human exposure to toxic metals and metalloids in consumer goods, cultural products, foods and other sample types while performing the analysis in situ has led to several important developments in portable XRF technology. In this study, a new portable XRF analyzer based on the use of doubly curved crystal optics (HD Mobile®) was evaluated for detecting toxic elements in foods, medicines, cosmetics and spices used in many Asian communities. Two models of the HD Mobile® (a pre-production and a final production unit) were investigated. Performance parameters including accuracy, precision and detection limits were characterized in a laboratory setting using certified reference materials (CRMs) and standard solutions. Bias estimates for key elements of public health significance such as As, Cd, Hg and Pb ranged from −10% to 11% for the pre-production, and −14% to 16% for the final production model. Five archived public health samples including herbal medicine products, ethnic spices and cosmetic products were analyzed using both XRF instruments. There was good agreement between the pre-production and final production models for the four key elements, such that the data were judged to be fit-for-purpose for the majority of samples analyzed. Detection of the four key elements of interest using the HD Mobile® was confirmed using archived samples for which ICP-OES data were available based on digested sample materials. The HD Mobile® XRF units were shown to be suitable for rapid screening of samples likely to be encountered in field based studies.
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作者：
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