摘要
根据盐酸普鲁卡因在 pH 12条件下发生水解的产物对氨基苯甲酸的荧光性质 ,用荧光分光光度法测定注射液中的盐酸普鲁卡因。激发和发射波长分别为 2 6 8和 34 0nm。线性范围为 0 0 0～ 5 0 0 μg·mL-1 ,线性回归方程为c=0 0 2 2I - 0 0 81,r =0 9996 ,相对标准偏差 3 4 %。实验了 pH值、干扰离子、卡那霉素、庆大霉素、青霉素、链霉素以及放置时间对测定的影响。测定了盐酸普鲁卡因和对氨基苯甲酸的量子产率 ,讨论了盐酸普鲁卡因的相对荧光强度随 pH值升高和放置时间的延长而增大的原因。方法检出限为 4 9ng·mL-1 。本法与死停法对照 。
Use of fluorescence spectrophotometry for the determination of procaine hydrochloride in injection solution of procaine hydrochloride in suggested based on fluorescence property of 4-aminobenzoate which is a hydrolysis product of the procaine hydrochloride in pH 12, with exciatation wavelength and emission wavelength at 268 and 340 nm, respectively. Under this condition, a linear relationship is obtained between procaine hydrochloride and the relative fluorescence intensity. The linear regression equation of the calibration graph is c = 0.022I - 0.081, with a linear regression correlative coefficient of 0.999 6 and relative standard deviation (RSD) of 3.4%. Influences of pH, foreign ions, kanamycin, gentamycin, beneylpencillin, streptomycin and standing for time on the determination of procaine hydrochloride have been examined. The reasons that the relative fluorescence intensity of procaine hydrochloride increases with a rise in pH and with standing for time are discussed. The detection limit of this method is 49 ng.mL(-1). The results obtained by the method agreed with those by the official method. The method is simple, and available to be used in the determination of procaine hydrochloride in injection solution.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期637-640,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金资助 (项目号 :299750 16)
