用变色酸分光光度法测定空气中甲醇

【摘要】 甲醇在酸性溶液中 ,被高锰酸钾氧化成甲醛 ,再在硫酸介质中与变色酸生成紫色化合物 ,在 5 80nm处用 1cm比色皿比色测定。根据分光光度法测得的吸光度值与甲醇含量的线性关系 ,提出并建立了测定甲醇含量的新方法。线性范围 0 0 4mg/m3～ 0 40mg/m3,用于空气中甲醇的测定均获满意结果。更多还原

【Abstract】 In acid solution,Carbinol was oxidized formaldehyde,then it interacts with chromotropic acid and generates purple chemical compound.Under the wavelength of 580 nm,we use 1-cm cell to analyse.Based the liner relation between spectrum absorption and CH3OH content,we pose a new method of determination of CH3OH content.The liner scope is between 0.04mg/m 3 and 0.4mg/m 3 ,we obtain a pleased result through this method.更多还原