【摘要】 基于在碱性条件下,吐温-20对邻苯二甲酸二甲酯(DMPT)的荧光强度有增强作用,建立了用荧光分光光度法测定环境水样中DMPT的方法。此荧光反应的激发和发射波长为eλx/eλm=282/369 nm,DMPT的检出限是0.01 mg.L-1,线性范围为0.02~7.0 mg.L-1,回收率在96.7%~106.5%之间。测定结果的RSD(n=7)为2.7%。更多还原

【Abstract】 Based on the fact that an enhancing effect on the fluorenscence intensity of dimethyl phthalate（DMPT） by the presence of Tween-20 in an alkaline solution,a method for the fluorophotometric determination of DMPT in water was established.The excitation and emission wavelengths of this fluorescence reaction were found to be 282 nm(λ_ex) and 369 nm(λ_em).Linear relationship between the magnitude of enhanced fluorescence intensity and the concentration of DMPT in the range of 0.02-7.0 mg per L of solution.Recoveries in range from 96.7% to 106.5% were obtained.Detection limit of the method was 0.01 mg·L^-1.RSD（n=7） of 2.7% was found in the analysis of water samples taken from the Suzhou Creek in shanghai.更多还原