Spectrophotometric Simultaneous Determination of Pyrocatechol, Resorcinol and Hydroquinone by LM-BP Neural Network
KAI Xiao-ming1,SHEN Yu-hua2,ZHANG Gu-xin1,XIE An-jian2
1. Chemistry Department of Anqing Normal College,Anqing 246011, China 2. College of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China
摘要: 应用人工神经网络原理,以Levenberg-marquardt back propagation(LM-BP)算法,对光谱严重重叠的邻苯二酚、间苯二酚和对苯二酚3组分进行同时测定。挑选283.5, 279.5, 276.5 nm处3波长为3种苯二酚的测量波长,按正交设计表L25(56)配置25组标准混合溶液,对3种苯二酚进行训练,平均平方误差(MSE)达到最小值0.083 114 3;同时预测了模拟混合样本中的邻苯二酚、间苯二酚和对苯二酚含量,3种苯二酚异构体在低浓度时误差稍大,绝大部分分析结果相对误差小于5%,特别是对吸收光谱严重重叠的邻苯二酚、间苯二酚有令人满意的分析结果。
关键词:人工神经网络;LM-BP算法;多组分同时测定;分光光度法;邻苯二酚;间苯二酚;对苯二酚
Abstract:By means of artificial neural network and Levenberg Marquardt Back Propagation(LM-BP) train algorithm,the three components of pyrocatechol, resorcinol and hydroquinone were determined simultaneously. The absorption spectra of these three components severely overlap in ultraviolet spectral range. Three wavelengths at 283.5, 279.5 and 276.5 nm were selected for the determination. 25 mixture standard solutions were prepared according to orthogonal projection form L25(56). Three kinds of components were trained. Mean Squared Error (MSE) reaching minimum value is 0.083 114 3. Meanwhile the contents of pyrocatechol, resorcinol and hydroquinone in six simulation mixture samples were predicted. The relative errors of the three kinds of components were slightly larger under the low concentration condition, and the mean relative error for most analytical results was less than 5%, especialmy it is satisfactory for the analytical results of pyrocatechol and resorcinol with severely overlapped absorption spectra.
[1] SUN Jian-qi,WU Hai-long, MO Cui-yun, et al(孙剑奇, 吴海龙, 莫翠云, 等). Chinese Journal of Chromatography(色谱),2002,20(5):385. [2] RUAN Guo-hong(阮国洪). Chinese Journal of Environment and Health(环境与健康杂志),2002,19(1):64. [3] CUI Hua,HE Cai-xia, ZHAO Gui-wen(崔 华, 贺彩霞, 赵贵文). Chemical Journal of Chinese Universities(高等学校化学学报),2000,21(6):876. [4] LIU Ping,SU Yue-zeng(刘 萍, 苏跃曾). Journal of Analytical Laboratory(分析试验室),1999,18(1):50. [5] FAN Hua-jun, ZHANG Wei, YAN Rong, et al(范华均, 张 薇, 晏 蓉, 等). Chemical Journal of Chinese Universities(高等学校化学学报),1994,15(9):1305. [6] LI Hong-xia,ZHANG Jun-jie,TANG Gui-fen(李红霞, 张俊杰, 唐桂芬). Physical Testing and Chemical Analysis(Part B: Chemical Analysis)(理化检验·化学分册),2000,36(5):340. [7] LI Zhi-liang,LIU Yi-ming, YU Ru-qin(李志良, 刘一鸣, 俞汝勤). Chemical Journal of Chinese Universities(高等学校化学学报),1989,10(6):575. [8] CHEN Li-li,JIN Ji-hong, WANG Hong-mei(陈莉莉, 金继红, 王红梅). Chinese Journal of Analytical Science(分析科学学报),2004,20(1):57. [9] LIU Ping, LIANG Yi-zeng, WANG Su-guo, et al(刘 平, 梁逸曾, 王素国, 等). Acta Chimica Sinica(化学学报),1997,55:386. [10] KAI Xiaoming(开小明). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2004,24(11):1412. [11] HE Chi-yang, SUN Yi-min, WU Gen-hua, CHEN Rong(何池洋, 孙益民, 吴根华, 陈 荣). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2001,21(5):719.