双波长分光光度法同时测定水杨醛和苯酚  

Simultaneous Determination of Salicylaldehyde and Phenol by DW-Spectrophotometry

作　　者：姚宏亮[1] 李方实[2] 董江水[1] 

机构地区：[1]金陵科技学院动物科学系,南京210038 [2]南京工业大学理学院应用化学系,南京210009

出　　处：《理化检验（化学分册）》2010年第1期41-42,45,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：利用水杨醛、苯酚的紫外吸收光谱特征及水杨醛在271 nm波长处有一个等吸收点,提出了同时测定水杨醛和苯酚的双波长分光光度法。选择328 nm和271 nm为测定波长,以其回归方程为基础建立了联立方程组,C水杨醛=31.31 A328 nm＋0.344;C苯酚=44.53 A271 nm-1.866 A328 nm-0.136,求得组分浓度与吸光度之间的关系,浓度在0.005-0.030 g·L-1范围内符合朗伯-比耳定律。DW-spectrophotometry was applied to the simultaneous determination of salicylaldehyde （SAD） and phenol （PHN） in water. As shown in the UV absorption spectra, an/so-absorption point at 271 nm was found in the absorption spectra of SAD, and the absorption maximum of SAD was found at the wavelength of 328 nm, while the absorption maximum of phenol were found at 271 nm and 278 nm. In the present method, the wavelengths of 328 nm and 271 nm were chosen as the wavelengths of determination of SAD and PHN respectively, and their contents in mass concentration （g . L-1） were found by the following simultaneous equations which were based on their regression equations： CSAD = 31. 31 A328 nm＋0. 344; CPHN = 44. 53 A271nm- 1. 866 A328nm--0. 136. For both compounds, the linearity range was kept between 0. 005--0. 030 g . L-1.

关 键 词：双波长分光光度法 水杨醛 苯酚 水样 

分 类 号：O657.32[理学—分析化学]