矿化地球化学样品的测试质量风险及对策

摘要

由于矿化样品的某种元素的含量高，对其他元素的测量产生了干扰，在质量参数均不超差的情况下，漏报、误报的风险极大。本文针对内蒙古自治区呼伦贝尔市八间房1：5万区域地质勘查调查样品中的10件矿化样品的铅的测试进行了方法比对试验，由于样品中钙量高，对原子吸收光谱法测铅产生了干扰，测试结果远远高于真实值。因此建议实验室在进行地球化学样品分析时，内检分析和异常抽查分析应尽量采用与基本分析不同的分析方法，规避误报、漏报的风险。%Because of the content of certain element in mineralized sample is high, which causes interference to the measurement of other elements, the quality parameters not out-of-tolerance, there is omissions and false positive risk. Aiming at lead test of 10 mineralized samples of 1:50000 regional geological exploration in Hulunbuir Bajianfang of Inner Mongolia Autonomous Region,performed method comparison experiment. High calcium samples interfered the determination of lead by atomic absorption spectrometry, test results are much higher than the true value. Suggest analyzing geochemical samples in laboratory, should use different analysis methods on internal analysis and abnormal spot check, to avoid false positive and omissions risk.