Method Development for Direct Multielement Quantification by LA-ICP-MS in Food Samples
Method Development for Direct Multielement Quantification by LA-ICP-MS in Food Samples
复制标题
通过 LAICP-MS 对食品样品进行直接多元素定量的方法开发
DOI：
10.1021/acs.jafc.8b05479
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发表时间：
2019-01-23
影响因子：
6.1
通讯作者：
Guo, Qinghai
中科院分区：
文献类型：
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作者：
Li, Yatai;Guo, Wei;Guo, Qinghai
通过合成加标琼脂糖凝胶作为基质匹配的外标物和碳作为内标物（IS），开发了一种准确测定植物性和动物性食品中必需和有毒元素的新型校准策略。将含有规定量分析物的琼脂糖水溶液（4%，m/v）浇铸在模具上，然后干燥，形成琼脂糖凝胶标准品。使用表面和深度映射激光烧蚀电感耦合等离子体质谱（LA-ICP-MS）方案检查凝胶中分析物的空间分布，并且发现凝胶均匀性优异（即，相对标准偏差
A novel calibration strategy for the accurate determination of essential and toxic elements in both plant-based and animal-based foods was developed by synthesizing spiked agarose gels as matrix-matched external standards and carbon as the internal standard (IS). Aqueous solutions of agarose (4%, m/v) with defined amounts of the analytes were cast on a mold and then dried to form the agarose-gel standards. The spatial distributions of the analytes in the gel were examined using surface- and depth-mapping laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) protocols, and the gel homogeneity was found to be excellent (i.e., relative standard derivation