【摘要】 研究了2-氯苯甲醛(CBZD)与苯肼的衍生化反应,在pH 1.0的乙醇/水溶液中,2-氯苯甲醛与苯肼形成荧光希夫碱,研究了希夫碱的荧光性质,希夫碱的荧光激发波长eλx=552.0 nm,发射波长eλm=299.2 nm.其荧光强度与2-氯苯甲醛浓度在0~120μg.L-1范围内呈线性关系,检出限为0.2μg.L-1。方法应用于矿泉水、自来水、生理盐水、葡萄糖注射液中2-氯苯甲醛的测定。更多还原

【Abstract】 Based on the derivatization of 2-chlorobenzaldehyde（Cl-BZD） with phenylhydrazine giving fluorescent（schiff′s） base,a fluorophotometric method for the indirect determination of 2-chlorobenzaldehyde was proposed.The reaction was carried out in an ethanol-water medium at pH 1.0.Wavelengths of excitation and emission maxima of the schiff′s base produced were found at 552.0 nm and 229.2 nm respectively.Linearity was obtained in the range of 0 to 120 μg·L^-1 expressed as 2-chlorobenzaldehyde,and the detection limit was found to be 0.2 μg·L^-1.RSD（n=11） of 0.21% was obtained at the concentration level of 50 μg·L^-1 of 2-chlorobenzaldehyde. In the application of the method to the analysis of physiological saline,glucose injection,mineral water and tap water samples,recoveries in the range from 102%¹04% were obtained.更多还原