Tetrasubstituted Sulphonated Aluminum Phthalocyanine-Cationic Surfactant System for Fluorimetric Determination of Ethanol in Alcoholic Beverage
- 化学化工－已发表论文 
基于四磺基铝酞菁（ＡｌＳ４ Ｐｃ）在阳离子表面活性剂存在下发生诱导缔合而导致体系荧光猝灭，而在乙醇存在下ＡｌＳ４ Ｐｃ解聚而使体系荧光恢复的原理，建立了测定白酒中乙醇含量的新方法。方法的线性区间为０．５％～９０％（Ｖ／Ｖ）乙醇，检测限为０．４８％（Ｖ／Ｖ）。本法已应用于实际酒样中乙醇的直接测定，结果满意。A new fluorimetric method was developed for the determination of ethanol in alcoholic beverage. The method is based on the principle that tetrasubstituted sulphonated aluminum phthalocyanine (AlS4Pc), a red-region fluorescent reagent, is induced to associate in the presence of cationic surfactant, cetyltrimehtylammonium bromide (CTMAB), thus its fluorescence is quenched, and then the aggregate is disaggregated by the addition of ethanol and the fluorescence is recovered. This method has a linear determination range of 0. 5% - 90. 0% (V/V), the detection limit is 0. 48% (V/V). The method has been used to determine real alcoholic beverage samples with satisfactory results.