| 偏最小二乘紫外分光光度法同时测定邻、间、对甲酚 |
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| 引用本文： | 李蕾,刘小明,李勋,潘建忠,魏敏.偏最小二乘紫外分光光度法同时测定邻、间、对甲酚[J].赣南师范学院学报,1994(5). |
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| 作者姓名： | 李蕾 刘小明 李勋 潘建忠 魏敏 |
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| 作者单位： | 赣南师范学院化学系 |
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| 摘 要： | 本文在乙醇／水（体积比１：８）混合溶剂中，用偏最小、二乘紫外分光光度法同时测定了甲酚的三个同分异构体。在２５０－２８５ｎｍ波长范围内，浓度为０—７０ｕｇ／ｍＬ的三种甲酚均遵守比耳定律。邻、间、对甲酚的最大吸收波长分别为２７０．５，２７１．５和２７７ｎｍ，相应的摩尔吸光系数为１．５６×１０￣３、１．３８×１０￣３和１．６５×１０￣３。测定合成样和工业甲酚的结果相对标准偏差均小３．５％，１／ｍｏｌ·ｃｍ。这个结果符合微量分析要求。
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| 关 键 词： | 偏最小二乘法，紫外分光光度法，甲酚 |
SIMULTANEOUS DETERMINATION OF CRESOL ISOMERS IN INDUSTRIAL CRESOL BY PLS ULTRAVIOLET SPECTROPHOTOMETRIC METHOD |
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| Li Lei, Liu Xiaming, Li Xun, Pan Jianzhong, Wei Min.SIMULTANEOUS DETERMINATION OF CRESOL ISOMERS IN INDUSTRIAL CRESOL BY PLS ULTRAVIOLET SPECTROPHOTOMETRIC METHOD[J].Journal of Gannan Teachers' College(Social Science(2)),1994(5). |
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| Authors: | Li Lei Liu Xiaming Li Xun Pan Jianzhong Wei Min |
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| Institution: | Department of Chemistry and Chemical Engineering |
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| Abstract: | In this paper, simultaneous determination of cresol isomers,e.g ortho-,meta-,and para- cresol,was made with partial Least Squares(PLS)ultraviolet spectrop hotometric method in complex solvent which consists of alcohol and water in volume ratio of to 8.All isomers obey the Beer's law from o to 70 ug/ml among the wave length range from 250 to 285 nm,In the complex solvent,maximum absorption wave lengthes of ortho-,meta-and para-cresol are 270.5.271.5 and277nm,respective1y,and their corresponding mo lar absorptivities are 1.56×10￣3.1.38×10￣3 and1.65×10￣3L/(mol.cm),The relative standard deviations of determining synthetic samples and industrial cresol are all smaller than 3.5%,which is satisfied in microanalysis. |
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| Keywords: | partial Least Squares Ultraviolet spectrophotometaic method cresol |
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