电感耦合等离子体质谱法分析不同产地大米中多种矿物元素  

Analysis of Multiple Mineral Elements in Rice from Different Origins by ICPMS

作　　者：李文冰 张奇 张振都[2] 牟金明[1] 宋志峰[2] LI Wenbing;ZHANG Qi;ZHANG Zhendu;MU Jinming;SONG Zhifeng(College of Agronomy,Jilin Agricultural University,Changchun 130118;Institute of Agricultural Quality Standard and Testing Technology,Jilin Academy of Agricultural Sciences,Changchun 130033,China)

机构地区：[1]吉林农业大学农学院,长春130118 [2]吉林省农业科学院农业质量标准与检测技术研究所,长春130033

出　　处：《东北农业科学》2020年第6期129-134,共6页Journal of Northeast Agricultural Sciences

基　　金：吉林省农业科技创新工程自由创新项目(CXGC2017ZY037)。

摘　　要：建立了一种电热湿法消解、电感耦合等离子体质谱法(ICP-MS)测定大米中14种矿物元素的方法。经方法学考察,方法准确度和精密度符合国家标准要求;14种矿物元素在定量限至10 000μg/L范围内线性关系良好(r>0.999),检出限为0.002~1 mg/kg,灵敏度高;利用建立的方法对产自吉林省吉林市等6个地区、18个水稻品种、64份大米样品中的K等14种矿物元素含量进行了测定,并对糙米、精米中矿物元素含量及产地差异性进行了比较分析。结果表明,人体必需的营养元素K、Ca、Mg和Mn在糙米中的含量明显高于精米;Al、Na、Cu、Zn、Se和Fe元素等在糙米含量略高于精米或相当;重金属元素As、Cr、Cd和Pb在糙米和精米中的含量差异性不显著;不同产地糙米和精米中K、Ca、Mg、Al、Se和Cd元素含量差异性均较小;不同产地糙米中Zn、Pb和Fe元素差异性较小;不同产地精米中Mn和As元素差异性较小,而在糙米中两种元素差异性较大;糙米和精米中Na、Cu和Cr元素差异性都较大。Setting up a measurement procedure based on electro thermal wet digestion and ICP-MS(Inductively Coupled Plasma Mass Spectrometry) to determine 14 mineral elements of rice. Verified by methodology, the accuracy and precision of our method are up to national standards. The linear relationship for 14 mineral elements which concentrations are limit of quantitation to 10 000 μg/L are good, and the detection limits are 0.002~1 mg/kg, high sensitivity. Making 64 rice samples from those rice which collected from 18 species of rice in 6 areas in Jilin city, Jilin province, then determined 14 mineral elements of those rice samples by established method, the mineral element contents and differences of polished rice and brown rice from different origins were compared. Analysis showed that the contents of K, Ca, Mg, Mn which are essential for human health in the brown rice are higher than those in the polished rice. The contents of Al, Na, Cu, Zn, Se, Fe in the brown rice are little higher than polished rice. There were no significant differences between the brown rice and the polished rice in the contents of As, Cr, Cd, Pb which are heavy mental elements. There was a little difference between the brown rice and the polished rice from different origins in the contents of K, Ca, Mg, Al, Se, Cd. There was a little difference between the brown rice from different origins in the contents of Zn, Pb, Fe. There was a little difference between the polished rice from different origins in the contents of Mn, As, the differences between the two elements in brown rice are great. There was a great significant difference between the brown rice and the polished rice from different origins in the contents of Na, Cu, Cr.

关 键 词：电热湿法消解 电感耦合等离子体质谱法 大米 矿物元素 差异性 

分 类 号：O657.63[理学—分析化学] TS210.7[理学—化学]