资质认定地矿行业评审组转发国家认监委 2013年实验室能力验证计划.pdf

Two Microwave Digestion Pretreatment s for Determination of Heavy Metals in Vegetable Samples HUANG Xiao- chun1，LIU Chang- hong2，ZHANG Jun1，DONG Yong- xiu1，LIU Wen- hua1， ZHAO Qiu- xiang1，LI Xi- kun1 1． Material Testing Center of Guangdong Province，Guangzhou510080，China; 2． Jinan University，Guangzhou510632，China Abstract Microwave digestion technology is a relatively recent for processing biological samples，but there are some problems，such as low efficiency，which require further study． As described in this paper，vegetables were decomposed by two different microwave digestion s of high pressure low flux and low pressure high flux microwave digestion． The contents of As，Cd，Cr，Cu，Ni，Pb and Zn in the sample solutions were determined by Inductively Coupled Plasma- Mass Spectrometry ICP- MS ，and contents of Hg by Hydride Generation- Cold Atomic Fluorescence Spectrometry HG- CAFS ． As shown by the experimental results，the measured value of National Standard Reference Materials is in agreement with the certified values by the two different s． The relative errors of the two s were less than 21，the relative standard deviation was less than 4 and the recovery ratios were 91． 5 － 103． 8． Low pressure high flux microwave digestion is a better of sample dissolution for large quantities of biological sample analysis because it improves the efficiency of sample digestion． Key words vegetable samples; heavy metal elements; high pressure low throughput microwave digestion; low pressure high throughput microwave digestion; Inductively Coupled Plasma- Mass spectrometry; Hydride Generation-  Cold Atomic Fluorescence Spectrometry 资质认定地矿行业评审组转发国家认监委 2013 年实验室能力验证计划 近日， 国家资质认定 计量认证 地矿行业评 审组转发了国家认监委 2013 年实验室能力验证计 划， 要求地矿行业获证实验室取得 A 类和 B 类项 目检测资质的实验室应按照国家认监委的要求积 极报名参加。相关计划内容已在国家认监委网站 公布， 其中 A 类项目“钨、 锡矿石化学成分分析” CNCA －13 － A14 能力验证项目由国家地质实验 测试中心承担， 相关报名事宜将在 2013 年 5 月 公布， 欢迎其他实验室参加。 请关注国家认监委网站 http ∥www． cnca． gov． cn 和国家地质实验测试中心网站 http ∥ nrcga． cags． ac． cn 的能力验证通知。 中国计量测试协会地质矿产实验测试分会 2013 年 4 月 9 日 914 第 3 期黄晓纯， 等 ICP － MS 测定蔬菜样品中重金属元素的两种微波消解前处理方法第 32 卷 ChaoXing