A fast and feasible method for Br and I determination in whole egg powder and its fractions by ICP-MS

卷:221

Toralles, Isis Goncalves ; Coelho, Gilberto Silva, Jr. ; Costa, Vanize Cadeira ; Cruz, Sandra Meinen ; Moraes Flores, Erico Marlon ; Mesko, Marcia Foster

Univ Fed Pelotas

关键词: Bromine determination;    Iodine determination;    Egg analysis;    Microwave-induced combustion;    Sample preparation;    ICP-MS;   

DOI  :  10.1016/j.foodchem.2016.11.081

学科分类：食品科学和技术

【 摘 要 】

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, 350 mg of whole egg powder and its fractions were efficiently digested using 50 mmol L (1) NH4OH 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 0.015 mu g g(-1), 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 (4.59-5.29 mu g g(-1)) was higher than I (0.150-2.28 mu g g(-1)) for all the evaluated samples. (C) 2016 Elsevier Ltd. All rights reserved.