高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (S1): 326.

• Molecular Spectroscopy • 上一篇    下一篇

A New Absorbance Ratio Derivative Spectrophotometry for the Simultaneous Determination of a Binary Mixture Containing Phenol and Resorcin

XU Jia-Liang, TANG Xiao-Dong, JIANG Xiang-Dong   

  1. Petrochemical Institute of East China University of Science and Technology, Shanghai 200540, P. R. China
  • 出版日期:1999-12-31 发布日期:1999-12-31

A New Absorbance Ratio Derivative Spectrophotometry for the Simultaneous Determination of a Binary Mixture Containing Phenol and Resorcin

XU Jia-Liang, TANG Xiao-Dong, JIANG Xiang-Dong   

  1. Petrochemical Institute of East China University of Science and Technology, Shanghai 200540, P. R. China
  • Online:1999-12-31 Published:1999-12-31

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摘要：

It is the most important problem of spectrophotometric analysis to determine two or more components in the same sample simultaneously without previous separation. In this respect, the absorbance derivative spectrophotometry is an analytical technique of great utility and offers greater selectivity than normal spectrophotometry. Recently, Salinas et al developed the absorbance ratio derivative spectra. The absorption spectrum of the mixture is divided by the absorption spectrum of a standard solution of one of the two or more components, and the first derivative of the ratio spectrum is obtained. The concentration of active component is then determined from a calibration graph obtained by measuring the amplitude at point corresponding to the minimum or maximum wavelength. In this way, the sensitivity of method is greatest.

Abstract:

It is the most important problem of spectrophotometric analysis to determine two or more components in the same sample simultaneously without previous separation. In this respect, the absorbance derivative spectrophotometry is an analytical technique of great utility and offers greater selectivity than normal spectrophotometry. Recently, Salinas et al developed the absorbance ratio derivative spectra. The absorption spectrum of the mixture is divided by the absorption spectrum of a standard solution of one of the two or more components, and the first derivative of the ratio spectrum is obtained. The concentration of active component is then determined from a calibration graph obtained by measuring the amplitude at point corresponding to the minimum or maximum wavelength. In this way, the sensitivity of method is greatest.

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