Marguí Eva, de Fátima Marques Alexandra, de Lurdes Prisal Maria, Hidalgo Manuela, Queralt Ignasi, Carvalho Maria Luisa
Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain.
Appl Spectrosc. 2014;68(11):1241-6. doi: 10.1366/13-07364. Epub 2014 Oct 1.
The present contribution presents a preliminary investigation of the chemical composition with respect to major, minor, trace, and ultratrace elements in several clam species that are frequently used for human consumption in Portuguese markets and worldwide. In order to use a simple and rapid analytical methodology for clam analysis, energy dispersive X-ray fluorescence (EDXRF) spectrometry and total reflection X-ray fluorescence (TXRF) spectrometry were selected as analytical techniques. The analytical capabilities of TXRF spectrometry were evaluated for the determination of minor and trace elements in commercial edible clams. We compared the direct analysis of powdered suspensions (using different sample amounts and dispersant agents) with the analysis of the digested samples for trace element determination. Inductively coupled plasma mass spectrometry analysis of clam digests was also performed to evaluate the analytical possibilities of TXRF spectrometry for trace and ultratrace analysis.
本论文对葡萄牙市场及全球范围内常用于人类食用的几种蛤类的主要、次要、痕量和超痕量元素的化学成分进行了初步研究。为了采用简单快速的蛤类分析方法，选择能量色散X射线荧光光谱法（EDXRF）和全反射X射线荧光光谱法（TXRF）作为分析技术。评估了TXRF光谱法测定商业食用蛤类中微量元素组成的分析能力。我们比较了粉末悬浮液直接分析（使用不同的样品量和分散剂）与消化样品用于微量元素测定的分析结果。还对蛤类消化液进行了电感耦合等离子体质谱分析，以评估TXRF光谱法进行痕量和超痕量分析的可能性。
