微波消解-ICP法测定坚果中钼含量  

Determination of Molybdenum in Nut by Microwave Digestion-ICP

作　　者：宋瑞[1] 李清清[1] 严睿 陆志芸[1] SONG Rui;LI Qingqing;YAN Rui;LU Zhiyun(Shanghai Institute of Quality Inspection and Shanghai Engineering Research Center for Food Rapid Detection,Shanghai 200233)

机构地区：[1]上海市质量监督检验技术研究院上海食品快速检测工程技术研究中心,上海200233

出　　处：《食品工业》2022年第3期254-256,共3页The Food Industry

基　　金：上海市科学技术委员会科研计划项目:食品中钼的测定等食品安全国家标准关键技术研究(编号:19DZ2202300)。

摘　　要：试验旨在建立微波消解-电感耦合等离子体光谱法测定坚果中钼含量的检测方法。采用硝酸体系微波消解进行前处理,电感耦合等离子体光谱法对坚果中钼含量进行测定。探讨前处理条件、仪器升温程序、仪器测定条件等检测条件,并对方法进行方法学验证。结果显示,钼元素在5~60μg/L范围内线性相关系数大于0.999,方法定量限为0.05 mg/kg。在0.1 mg/kg加标水平下,回收率为101.6%~109.3%,SRSD为4.55%;在0.4 mg/kg加标水平下,回收率为94.5%~96.7%,S;为2.47%;在0.8 mg/kg加标水平下,回收率为91%~96.4%,S;为5.77%。此方法操作简便,灵敏度和精密度好,适用于测定坚果中钼的含量。A method of microwave digestion-inductively coupled plasma atomic emission spectrometry was established for the determination of molybdenum in nut.The preliminary treatment of sample was carried out by microwave digestion with HNO;.The extract was analyzed by inductively coupled plasma atomic emission spectrometry and quantified.The linear correlation coefficient of the molybdenum was greater than 0.999 in the range of 5-60μg/L,and the limit of quantitation was 0.05 mg/kg.At 0.1 mg/kg spike level,the recovery was between 101.6%and 109.3%,and SRSD was 4.55%;At 0.4 mg/kg spike level,the recovery was between 94.5%and 96.7%,and S;was 2.47%;At 0.8 mg/kg spike level,the recovery was between 91%and 96.4%,and SRSD was 5.77%.The established method was simple and quick,and had high precision and good accuracy,which could be used for determination of molybdenum in nut.

关 键 词：钼 微波消解 电感耦合等离子体光谱法 坚果 

分 类 号：O657.31[理学—分析化学] TS255.7[理学—化学]