流动注射分光光度法测定白酒中的甲醇  

Flow Injection Spectrophotometric Determination of Trace Methanol in White Spirits

作　　者：邹玉权 李华[2] 涂杰[3] 张新申[3] 

机构地区：[1]珠海市水质监测中心,广东珠海519020 [2]西南科技大学,四川绵阳621000 [3]四川大学皮革与工程教育部重点实验室,四川成都610065

出　　处：《广东化工》2009年第7期206-207,233,共3页Guangdong Chemical Industry

基　　金：国家863项目(2002AA639290)

摘　　要：在酸性和加热条件下,甲醇的氧化产物与变色酸发生显色反应,从而建立起测定甲醇的新方法。通过优化反应的化学因素和流动注射系统测定条件。该方法的检出限和线性范围分别为1μg/L(3σ)和0.05～5mg/L,5～200mg/L,应用于白酒中的甲醇的测定,回收率在92.5%～100.5%之间,结果令人满意。An improved method was developed for the determination of trace methanol in White Spirits. The method is based on the combination of chromotropic acid with formaldehyde which is the oxidation under acidic and beating conditions. Optimization of chemical and FI variables was made. Under the optimized conditions, the calibration curve obtained were linear over the rage 0.05-5 mg/L and 5-200mg/L, the detection limit was 1μg/L（3σ）, The proposed method was successfully applied to determine the methanol in commercial liquiors and recoveries were 92.5 %-100.5 %.

关 键 词：甲醇 白酒 流动注射 变色酸 

分 类 号：TB[一般工业技术]