一种通过电感耦合等离子体质谱法测定全蛋粉及其组分中溴和碘的快速可行方法。
A fast and feasible method for Br and I determination in whole egg powder and its fractions by ICP-MS.
作者信息
Toralles Isis Gonçalves, Coelho Gilberto Silva, Costa Vanize Cadeira, Cruz Sandra Meinen, Flores Erico Marlon Moraes, Mesko Marcia Foster
机构信息
Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Pelotas, RS, Brazil.
Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
出版信息
Food Chem. 2017 Apr 15;221:877-883. doi: 10.1016/j.foodchem.2016.11.081. Epub 2016 Nov 19.
A method for Br and I determination in whole egg powder and its fractions (egg white and yolk) was developed by combining microwave-induced combustion (MIC) and inductively coupled plasma mass spectrometry (ICP-MS). Using the MIC method, 350mg of whole egg powder and its fractions were efficiently digested using 50mmolLNHOH as an absorbing solution. The limits of detection for Br and I using the MIC method followed by ICP-MS determination were 0.039 and 0.015μgg, respectively. Using the proposed method, agreements with the reference values between 97 and 104% for Br and I were obtained by analysis of reference material NIST 8435. Finally, it was possible to observe that Br concentration (4.59-5.29μgg) was higher than I (0.150-2.28μgg) for all the evaluated samples.
通过结合微波诱导燃烧（MIC）和电感耦合等离子体质谱（ICP-MS），开发了一种测定全蛋粉及其组分（蛋清和蛋黄）中溴和碘的方法。使用MIC方法，以50mmol/L的氢氧化铵作为吸收溶液，对350mg全蛋粉及其组分进行了高效消解。采用MIC方法后通过ICP-MS测定，溴和碘的检测限分别为0.039和0.015μg/g。使用所提出的方法，通过分析标准物质NIST 8435，溴和碘与参考值的一致性在97%至104%之间。最后，可以观察到，对于所有评估样品，溴的浓度（4.59 - 5.29μg/g）高于碘（0.150 - 2.28μg/g）。
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