ICP-OES测定大米中镉的方法研究  

Detection of cadmium in rice by inductively coupled plasma optical emission spectrometry

作　　者：胡小玲[1] 陈剑刚[1] 张艳[1] 张瑰[1] 

机构地区：[1]珠海市疾病预防控制中心,广东珠海519002

出　　处：《实用预防医学》2015年第8期930-932,共3页Practical Preventive Medicine

基　　金：广东省医学科研基金项目(A2013627)

摘　　要：目的建立电感耦合等离子体发射光谱（ICP-OES）测定大米中镉含量的分析方法。方法用微波消解法消化样品，微波消解前后用加热方式进行样品的预消化及赶酸处理，ICP—OES法测定。结果样品消解完全。镉浓度在O～5．0mg／L范围内线性好，r=0．9999，方法的检出限为0．02mg／kg。三个浓度水平下的相对标准偏差（磷、D）为0．42％--2．32％，回收率在86．0％～108．3％之间，结果符合检测方法确认的技术要求。结论ICP—OES简便、灵敏度高，准确度和精密度好，可用于大米中镉含量的测定。Objective To develop a method for rapid determination of cadmium in rice by inductively coupled plasma optical emission spectrometer （ICP- OES）. Methods The samples were digested by microwave digestion, and then measured by ICP - OES. Results The samples were digested completely. ~ linearity was obtained in a range of 0 - 5.0 mg/L, with the correlation coefficient of 0. 9999. The limit of detection （LOD） was 0.02 mg/kg. The recoveries were found in the ranges of 86.0% - 108.3% at the 3 levels of concentrations, with the relative standard deviation （RSD） of 0.42% - 2.32%. The deter- mination results accorded with the technical requirements of the test method. Conclusions The inductively coupled plasma optical emission spectrometer （ICP- OES） is convenient, sensitive, accurate, precise and available to determine the cadmium in rice.

关 键 词：电感耦合等离子体发射光谱 大米 镉 

分 类 号：R155.5[医药卫生—营养与食品卫生学]