碰撞池-电感耦合等离子体质谱法测定不同加工程度稻米中9种矿质元素  

Determination of 9 Mineral Elements in Paddy Rice Processed to Different Degrees by Collision/Reaction Cell Technology-Inductively Coupled Plasma Mass Spectrometry

作　　者：凌海 梁静 王金子 LING Hai;LIANG Jing;WANG Jin-zi(Guangxi Grain&Oil Quality Supervision and Inspection Center,Nanning 530031,Guangxi,China;School of Marine Sciences and Biotechnology,Guangxi Minzu University,Nanning 530008,Guangxi,China;Guangxi Key Laboratory for Polysaccharide Materials and Modification,Nanning 530008,Guangxi,China)

机构地区：[1]广西壮族自治区粮油质量检验中心,广西南宁530031 [2]广西民族大学海洋与生物技术学院,广西南宁530008 [3]广西多糖材料与改性重点实验室,广西南宁530008

出　　处：《食品研究与开发》2023年第6期171-175,共5页Food Research and Development

基　　金：国家自然科学基金项目(31960030)。

摘　　要：为分析稻米经过不同程度加工后多种矿质元素的含量及分布情况,将稻谷进行加工,得到糙米、留皮80%、留皮50%的大米及精米4种不同加工程度的样品,采用微波消解-双重四极杆碰撞反应池技术-电感耦合等离子体质谱(inductively coupled plasma-mass spectrometry,ICP-MS)法检测不同加工程度的稻米中Na、Mg、K、Ca、Mn、Fe、Cu、Zn、Se 9种矿质元素。样品进行测定时采用^(45)Sc、^(89)Y作为内标元素,对方法的检出限、精密度、回收率等进行考察,采用国家标准物质进行验证。结果表明各元素的标准曲线线性良好,相关系数为0.999 1~0.999 9,检出限为0.009 0 ng/mL~0.870 0 ng/mL,相对标准偏差为1.07%~3.13%,回收率为89.5%~107.2%,不同矿质元素在稻米中分布不同,加工程度不同其含量差异较大。大部分矿质元素随稻米加工程度加大其含量不断减少,糙米中矿物质含量是精米中的数倍。The study aims to analyze the content and distribution of various mineral elements in paddy rice processed to different degrees.To be specific,paddy rice was processed to yield brown rice,rice with 80% bran left,rice with 50% bran left,and milled rice,respectively.The content and distribution of Na,Mg,K,Ca,Mn,Fe,Cu,Zn and Se in them were detected by microwave digestion-double quadrupole/collision/reaction cell technology-inductively coupled plasma mass spectrometry(ICP-MS),and ^(45)Sc and ^(89)Y were used as internal standards.The limit of detection,precision,and recovery of the method were investigated,and national standard reference materials were employed for verification.The results showed that the standard curve of each element had good linearity,with correlation coefficients of 0.999 1-0.999 9 and detection limits of 0.009 0 ng/mL-0.870 0 ng/mL.The relative standard deviations were in the range of 1.07%-3.13% and the recovery fell in the range of 89.5%-107.2%.The distribution of different elements differed significantly in rice processed to different degrees.The content of most mineral elements decreased with the processing and particularly,the content in brown rice was several times that in milled rice.

关 键 词：双重四极杆 碰撞反应 电感耦合等离子体质谱法 稻米 矿质元素 

分 类 号：O657.63[理学—分析化学] TS210.7[理学—化学]