卡尔曼滤波紫外光度法同时测定邻、间、对苯二酚

Simultaneous Determination of Catechol, Resorcinol and Hydroquinone with Kalman Filtering Ultraviolet Spectrophotometry

中文关键词:  邻苯二酚  间苯二酚  对苯二酚  卡尔曼滤波  紫外光度法  同时测定

英文关键词:Catechol Resorcinol  Hydroquinone  Kalman filtering  Ultraviolet spectrophotometry  Simultaneous determination

中文摘要:

      研究了苯二酚三种同分异构体水溶液的紫外吸收光谱,在pH3.6的缓冲溶液中,邻、间、对苯二酚的紫外吸收峰分别为275nm、273nm和288nm,三者重叠严重.选取在240um～290nm范围内,每隔1nm测量一次吸光值共51个点,采用卡尔曼滤波进行处理.可以获得较满意的结果.对10个不同比例组成的标准混合液进行测定,邻、间、对苯二酚三者的平均回收率分别为97.4%,101.7%和98.0%,标准偏差分别为1.72%,3.86%和2.04%.对模拟试样中加入标准的回收率均在96.0%～103.0%之间.

英文摘要:

      The ultraviolet spectrophotometry based on Kalman filtering(KF) was applied to determine simultaneously three isomeric dihydroxybenzenes,catechol(1,2-dihydroxybenzene), resorcinol(1,3-dihydroxybenzene and hydroquinone(1,4-dihydroxybenzene) without preliminary separation.The ultraviolet absorption peaks of their aqueous solutions (pH=3.6) are 275nm,273nm and 288mp respectively.The average recoveries of catechol, resorcinol and hydroquinone in standard mixtures are 97.4%,101.7% and 98.0%,with standard deviations of 1.72%,3.86% and 2.04% (n=10),respectively.The proposed method has been used for the simultaneous determination of the thine isomers in simulating samples with satisfactory results.