格兰诺拉燕麦片中氯、溴和碘的测定：一种使用电感耦合等离子体质谱法的准确分析方法的开发
Determination of Cl, Br and I in granola: Development of an accurate analytical method using ICP-MS.
作者信息
Druzian Gabriel T, Nascimento Mariele S, Cerqueira Uillian M F M, Novaes Cleber G, Bezerra Marcos A, Duarte Fabio A, Flores Erico M M
机构信息
Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
Departamento de Ciências e Tecnologias, Universidade Estadual do Sudoeste da Bahia, 45208-409 Jequié, BA, Brazil; Departamento de Química Analítica, Instituto de Química, Universidade Federal da Bahia, Campus Universitário de Ondina, 40170-115 Salvador, BA, Brazil.
出版信息
Food Chem. 2021 May 15;344:128677. doi: 10.1016/j.foodchem.2020.128677. Epub 2020 Nov 19.
Microwave-induced combustion (MIC) system for further Cl, Br, and I determination in granola by inductively coupled plasma mass spectrometry (ICP-MS) was proposed. A high sample mass of granola was pressed as pellets and inserted into the proposed MIC system. Water and NHOH were evaluated as absorbing solutions. The accuracy was estimated by the analysis of two certified reference materials and also by spike recoveries. Using the optimized conditions (zirconium ball milling, 1 g of granola and 6 mL of 50 mmol LNHOH), the agreement with the certified values ranged from 94 to 98% and recoveries higher than 95% were obtained. Low carbon concentration in digests (<25 mg L) was achieved, minimizing interferences by ICP-MS. Blanks were negligible and only diluted solutions were required. The concentration in samples ranged from 322 to 896, 0.618 to 0.980 and < 0.002 to 0.181 µg g for Cl, Br and I, respectively.
提出了一种用于通过电感耦合等离子体质谱法（ICP-MS）进一步测定格兰诺拉燕麦片中氯、溴和碘的微波诱导燃烧（MIC）系统。将大量的格兰诺拉燕麦片压制成颗粒，并插入所提出的MIC系统中。评估了水和氢氧化铵作为吸收溶液。通过分析两种有证标准物质以及加标回收率来评估准确度。在优化条件下（锆球磨，1克格兰诺拉燕麦片和6毫升50毫摩尔/升氢氧化铵），与认定值的一致性范围为94%至98%，回收率高于95%。消解液中的碳浓度较低（<25毫克/升），从而将ICP-MS的干扰降至最低。空白值可忽略不计，仅需稀释溶液。样品中氯、溴和碘的浓度分别为322至896、0.618至0.980以及<0.002至0.181微克/克。
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