碰撞池反应-电感耦合等离子体质谱(ICP-MS)法测定出口食品营养强化剂中的26种元素

采用碰撞池反应-电感耦合等离子体质谱(ICP-MS)法建立了11种营养强化剂中26种元素的He碰撞反应池模式下的全定量检测方法。考察了不同的样品处理方式及样品称样量对分析过程的影响,比较了普通模式和He碰撞反应池模式的优缺点。实验结果表明,对于易溶性营养强化剂可以采用直接酸溶液溶解进样方式,且定容体积为10 mL时有机强化剂称样量控制在0.20 g、无机强化剂称样量控制在0.10 g以下时基体干扰较小,可得到满意的测定结果。各元素加标回收率在81.0%~110%,相对标准偏差(RSD)为2.1%~5.4%,可实现对26种元素一次性测定,为河北辖区出口营养强化剂提供分析方法和风险监控分析依据。

Analysis of twenty-six elements in the export of nutrition fortifier by collision cell reaction- inductively coupled plasma mass spectrometry

The quantitative detection technique of 26 elements in nutrition fortifier under He collision reaction cell model by use of the reaction collision cell inductively coupled plasma mass spectrometry(ICP-MS)was established.The influence of different sample processing methods and sample weight on the analysis process is investigated,and the advantages and disadvantages of common mode and He collision reaction cell model are compared.Experimental results show that for soluble nutrient fortifiers,direct acid solution can be used to dissolve the sample,and when the constant volume is 10 mL,the measuring amount of organic fortifier is controlled at 0.20 g,and when the measuring amount of inorganic fortifier is controlled below 0.10 g,the matrix interference is small,and satisfactory results can be obtained.The standard recovery rate of each element is 81.0%-110%,and the relative standard deviation(RSD)is 2.1%-5.4%,which can realize the one-time determination of 26 elements,and provide the analysis method and risk monitoring analysis basis for the export of nutritional fortifiers in Hebei province.