应用数学统计评价甲烷测量方法的准确度  

Application of Mathematical Statistics on the Quality Evaluation for The Accuracy of Methane Measurement Method

作　　者：李松[1] 刘晨[1] 饶竹[1] 赵省民[2] 邓坚[2] 

机构地区：[1]国家地质实验测试中心,北京100037 [2]中国地质调查局油汽资源调查中心,北京100029

出　　处：《数学的实践与认识》2015年第23期186-191,共6页Mathematics in Practice and Theory

基　　金：中国地质调查局地质调查项目资助(GZH201400303)

摘　　要：采用5个浓度水平样品通过7家实验室进行协同评定试验，验证了甲烷分析方法的稳定性与准确性．由于个别实验室或数据可能与其他实验室或其他数据存在明显不一致从而影响统计处理，故应用数学统计法对这些数值进行了一致性和离群值检验，并应用柯克伦和格拉布斯法则对测量方法与结果的准确度进行了确定．统计结果表明，甲烷在204．0～99400μL／L浓度水平范围内，参与统计的各实验室所提供的测量结果全部被采纳，且气体浓度与标准差呈现指数函数关系．通过协同评定试验结果表明，CH4气体可以应用气相色谱直接注射进样和热导检测器联合检测，方法可靠．In this paper the way of combined testing of direct injection and thermal conductivity detector in methane analysis, the stability and accuracy of t method have been determined from a balanced uniform-level experiment involving 5 levelgand 7 laboratories. The presence of individual laboratories or values that appeared to be inconsistent with all other laboratories or values may change ＇the estimates, therefore, decisions have to be made with respect to these values. The balanced uniform-level experiment can provide a deterministic way to prove the accuracy of measurement methods and results with Cochran＇test and Grubbs＇test method. The measurement results within a level range 204.0μL/L to 99400 μL/L show that the total data from laboratory are adopted and the gas concentration equation is exponential function with the standard deviation. The detection method is accurate and reliable.

关 键 词：质量评价 平衡均匀水平试验 重复性限 再现性限 甲烷 

分 类 号：TQ221.11[化学工程—有机化工] O213[理学—概率论与数理统计]