摘要
标准物质参考值的准确性在测试仪器校准、分析数据质量监控以及方法评价等方面具有非常重要的作用。为了检验国家地质标准物质参考值的准确性,本文应用高温高压密闭溶样-电感耦合等离子体质谱法分析了国家地质标准物质的18种岩石(GBW 07103～GBW 07125)、19种沉积物(GBW 07301～GBW 07318)和19种土壤(GBW 07401～GBW 07430)中36种痕量与稀土元素。结果表明,除个别标准样品中的几个元素(Ni、Cr、Pb、Co、Cu、Sc、Yb、Lu)外,其余国家标准物质中36种元素测定结果的相对标准偏差均小于10%;绝大部分元素测定值的相对误差小于10%,测定值与参考值能较好地吻合。将误差较大元素的测定值与其他实验室的测定值以及文献报道值进行了比较,指出已有的参考值需要修正;针对部分沉积物和土壤中的元素未提供参考值,如GBW 07306的Ni、GBW 07313的Be、Hf、Ta,GBW 07314的Li、Be,GBW 07409、GBW 07410和GBW07411的Hf、Ta,GBW 07426的Gd、Ta,本文给出了相应的参考值。
The accuracy of the certified values of the national reference materials plays an important role in instrument calibration, and therefore quality control for analysis data. In order to test the acenraey of the certified values of the Chinese National Standard Reference Materials, 36 trace elements were determined for 18 National Standard Reference Materials of rock （from GBW 07103 to GBW 07125 ）, 19 National Standard Reference Materials of sediment （from GBW 07301 to GBW 07318） and 19 National Standard Reference Materials of soil （from GBW 07401 to GBW 07430） by Inductively Coupled Plasma-Mass Spectrometry （ICP-MS）. These National Standard Reference Materials were digested by using the pressurized acid digestion technique. The relative standard deviation （RSD） of most trace elements in these materials were typically better than 10% , except for Ni, Cr, Pb, Co, Cu, So, Yb and Lu in several reference materials. Most of the results were consistent with the certified values in the literature, and with a relative encor of less than 10%. Results given here indicate that a few certified values of some reference materials should be revised. In addition, content values of some trace elements in the National Standard Reference Materials of sediment or National Standard Reference Materials of soil, such as Ni for GBW 07306, Be, Hf and Ta for GBW 07313, Li and Be for GBW 07314, Hf and Ta for GBW 07409, GBW 07410 and GBW 07411 , Gd and Ta for GBW 07426 are provided here.
出处
《岩矿测试》
CAS
CSCD
北大核心
2013年第2期221-228,共8页
Rock and Mineral Analysis
基金
国家自然科学基金项目(40902056)
科技部国家重点实验室自主研究重点课题(BJ11070)
关键词
密闭溶样
电感耦合等离子体质谱法
国家地质标准物质
岩石
沉积物
土壤
参考值
pressurized acid digestion
Inductively Coupled Plasma-Mass Spectrometry
National GeologicalReference Materials
rock
sediment
soil
proposed values
