Evaluation of Chromium and Manganese levels in sports supplements using graphite furnace atomic absorption spectrometry

ABSTRACT Objective In this paper, we studied three different types of ordinary sports supplements containing whey protein: whey protein-based ones, hypercaloric ones, and protein bars. Methods A sample preparation procedure was studied employing microwave-assisted wet digestion in order to determine the Chromium and Manganese levels by graphite furnace atomic absorption spectrometry. Results The developed methods have presented good accuracy (recoveries in the range of 90% to 109%) and precision (Relative standard deviation

摘要 研究目的：本文针对三类含乳清蛋白（whey protein）的普通运动补剂开展研究，分别为乳清蛋白基底补剂、高能量补剂与蛋白棒。研究方法：本文探究了微波辅助湿消解法（microwave-assisted wet digestion）的样品前处理流程，以石墨炉原子吸收光谱法（graphite furnace atomic absorption spectrometry）测定样品中铬（Chromium）与锰（Manganese）的含量。研究结果：所建立的方法具有良好的准确度（回收率介于90%至109%之间）与精密度（相对标准偏差