| 摘要: |
| 为了对广西区内法定计量机构的酸度计量标准及技术人员检定水平进行能力验证,并确保全区范围内酸度量值传递的统一和可靠,2009年3月至6月间进行广西法定计量机构酸度量值比对。比对分为pH计检定和盲样测试两部分,pH计检定结果参考值来自主导实验室多次测量的平均值,盲样测量结果的参考值来自中国计量科学研究院化学所的认定值。pH计检定和盲样测试分别采用Z比分数法和En值法对比对结果进行满意度判定。广西大多数参加比对的法定计量技术机构都取得了满意的结果,但是检定操作细节和不确定度评定方面仍存在有不足之处。 |
| 关键词: 计量 酸度 比对 不确定度 量值传递 |
| DOI： |
| 投稿时间：2010-05-14 |
| 基金项目: |
|
| Summary of Comparison for the Quantity pH Value among Authorized Metrology Institutes in Guangxi |
|
FAN Xiao-hui
|
| (Guangxi Zhuangzu Autonomous Region Institute of Metrology & Test, Nanning, Guangxi, 530022, China) |
| Abstract: |
| In the year 2009 from March to June, the comparison for the quantity pH was carried out to demonstrate the calibration and measurement capability of the authorized metrology institutes in Guangxi Zhuangzu Autonomous Region, and to establish a reliable metrological traceability chain to Guangxi Zhuangzu Autonomous Region pH standard. This comparison was composed of pH meter verification and sample test.The reference value of pH meter verification result was obtained from the average value of repeated measurement in pilot laboratory. The reference value of sample test result was confirmed by the chemistry institute of NIM.The evaluation of comparison results was determined by Z scores and En value.The satistied results were observed for the majorities of participants but still there were some deficiencies in details of verification operation and the evaluation of measurement uncertainty. |
| Key words: metrology pH value comparison measurement uncertainty measurement traceability |
