污水酸碱分析用pH计仪器示值误差测量结果不确定度分析

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Uncertainty Analysis of pH Meter Indication Error Measurement Result for Acid-base Analysis of Wastewater

FUMeiyuan （Shishi Institute of Quality and Metrology Testing）

Abstract：pHis themainindex stipulated inthecompulsory national standards GB8978-1996andGB18918-2002.pHmeter is awidelyusedchemicalanalysis instrument，which isameasuring instrument for measuring pHvalue.Inorder toensure accuracy and reliability of pH measurement value，and objectively reflect pH of wastewater， laboratory pH meter used for acid-baseanalysisof wastewater wasstudiedand uncertaintyof pHindicationerror wasanalyzed.Experimentalresults show that pH indication error is -0.Ol（pH） and expanded uncertainty is 0.02（pH） ，which meets requirements. This study provides effective reference for technical personnel to ensure accuracy and reliability of pH measurement， and plays an important role in environmental protection.

Keywords：wastewater; acid-base analysis; pH meter; uncertainty

0 引言

pH主要指示水的酸碱性。（剩余1656字）