变色酸比色法测定环境空气中甲醇的试验研究

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关键词：变色酸比色法；环境空气；甲醇；相关系数；质量控制中图分类号：X831 文献标识码：A 文章编号：1008-9500（2025）05-0035-03DOI： 10.3969/j.issn.1008-9500.2025.05.007

Abstract：Theexperimentuses thechromogenicacidcolorimetricmethod todeterminethemethanolcontentintheambient air，before themethodisimproved，thecorrlationcoeffcientofthecalibrationcureislessthan.999.Teexperment makes necessaryadjustments to the sulfuric acid concentration，operation sequence，standard series solution concentration， and coling method，aftermethod improvement，thecorrlation coeffcient ofthecalibration curve is 0.999 4.Whenusing theimproved method to determine theself prepared standardsample，therelative erorof theaverage measurement value is （204号 -3.2% ，the relative standard deviation is 3.13% ， and the recovery rate of spiked samples is 92.8%～ 97.2% ， which meets the quality control requirements.

KeyWords： chromogenic acid colorimetric method; ambient air; methanol; correlation coefficient; quality control

根据《空气和废气监测分析方法》，环境空气中甲醇的测定采用变色酸比色法[1]。（剩余2873字）