連續(xù)流動分析儀在水中高錳酸鹽指數(shù)能力驗證測定中的優(yōu)勢分析

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Advantages Analysis of Using Continuous Flow Analyzer for Capability Verification Determination of Permanganate Index in Water

LI Cunxian，MAO Li， ZI Feiyan， WEI Guoqing， SUN Pengfei （Yunnan Chuxiong Prefecture Center for Disease Control and Prevention， Chuxiong 675o00， China）

Abstract： Objective： To verify the advantages of continuous flow analyzer in the proficiency testing of permanganate index in water and provide a reference for supplementing the national standard method of permanganate index in water. Method： The certified standard samples and proficiency testing samples were determinedbyacid potassium permanganate titrationandcontinuous flowanalyzer，and theresultsofthe two methods werecomprehensivelyanalyzed and evaluated.Result：The results of differentconcentrations of permanganate index determined by continuous flow analyzer were consistent with those of the national standard method.The |z| value of the proficiency testing sample was 0.63，and the results were satisfactory.The relative error between the sample mean and the standard value was 1.05%～ 11.11% ，the relative standard deviation was 0.54%～ 1.75% and the standard curve R2 was 0.999 7. The accuracy， precision and correlation coefficient of the standard curve met the requirements. Conclusion： Compared with the traditional national standard method acid potassium permanganate titration，the continuous flow analyzer has the advantages of lesssample consumption，less reagent consumption， less environmental polution，stable heating temperature， high degree of automation and high detection efficiency. Therefore， it is recommended to be included in the national standard method system.

Keywords： permanganate index in water; capability verification; continuous fow analyzer; advantage analysis

高錳酸鹽指數(shù)可反映水體中有機物及無機可氧化物質污染的程度，是現(xiàn)行水質評價標準中的重要指標之一，是生活飲用水監(jiān)測的常規(guī)項目[]。（剩余5339字）