紫外双波长法测定反应液中的2-甲基萘与2-甲基-1,4-萘醌  

Determination of 2-methylnaphthalene and 2-methylnaphthoquinone-1,4 in reaction solution by UV spectrophotometry

作　　者：宋成盈[1] 刘志生[1] 赵建宏[1] 王留成[1] 王福安[1] 

机构地区：[1]郑州大学化工学院,郑州450001

出　　处：《郑州大学学报（医学版）》2007年第3期478-480,共3页Journal of Zhengzhou University(Medical Sciences)

基　　金：河南省自然科学基金资助项目0611023300

摘　　要：目的：探讨紫外分光光度法测定反应液中2-甲基萘（2-MN）和2-甲基-1,4-萘醌（2-MNQ）含量的方法。方法：根据2-MN和2-MNQ在无水乙醇溶液中的光谱特征,采用等吸收点双波长法,选择275.6nm和332.8nm为测定波长。结果：在7.776-46.656mg/L和6.882-41.291mg/L的线性范围内,2-MN和2-MNQ的平均回收率分别为99.5%和99.4%,相对标准偏差分别为1.29%和1.07%。结论：该方法可以不经分离同时测定2-MN和2-MNQ的含量,方法简便、快速,结果准确。Aim： To explore a new UV spectrophotometry method for the determination of 2-methylnaphthalene（2- MN） and 2-methylnaphthoquinone-1,4（2-MNQ） in reaction solution. Methods ： According to UV spectral properties of 2- MN and 2-MNQ in anhydrous alcohol, the equivalence absorbency double-wavelength UV spectrophotometry was adopted, and 275.6 nm and 332.8 nm were selected as determination wavelengths. Results： The method was linear within the range of 7. 776 - 46. 656 mg/L of 2-MN and 6. 882 - 41. 291 mg/L of 2-MNQ. The average recoveries of 2-MN and 2-MNQ were 99.5% and 99.4%, respectively. Therelative standard deviations were 1.29% and 1.07%, respectively. Conclusion： The contents of 2-MN and 2-MNQ could be obtained simultaneously without previous separation by this method, which is simple, rapid and accurate.

关 键 词：2-甲基萘 2-甲基-1 4-萘醌 双波长 紫外分光光度法 

分 类 号：O657.32[理学—分析化学]