STUDY OF PHOTOGRAPHIC PROPERTY OF GELATIN MACROMOLECULE Ⅰ. THE DETERMINATION OF METHIONINE SULFONE AND SULFOXIDE CONTAINED IN PHOTOGRAPHIC GELATINS

doi:10.7517/j.issn.1674-0475.1993.02.40

Imaging Science and Photochemistry ›› 1993, Vol. 11 ›› Issue (2): 40-44.DOI: 10.7517/j.issn.1674-0475.1993.02.40

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STUDY OF PHOTOGRAPHIC PROPERTY OF GELATIN MACROMOLECULE Ⅰ. THE DETERMINATION OF METHIONINE SULFONE AND SULFOXIDE CONTAINED IN PHOTOGRAPHIC GELATINS

LI XUN¹, PENG BI-XIAN¹, XIAO YU-XIA², NI JING-HUA²

1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101, P.R. China;
2. Institute of Medicine, Academy of Medical Sciences, Beijing 100050, P.R. China

Received:1992-04-30 Revised:1992-12-10 Online:1993-05-20 Published:1993-05-20

Abstract

Abstract: Considering the great influence of methionine on the reducing capacity of gelatin it is of great importance to simultaneously determine the oxidized forms of Met(Metsox and Metson) contained in photographic gelatins. In present study, the complete analysis of amino acids, including Methioine, Methionine Sulfone and Sulfoxide contained in a range of gelatins, was performed with a Hitachi L-8500 Amino Acid Analyzer. Special attention had been paid to improve the test reproducibility and accuracy of this simultaneous determination method.It was shown that the Met contents are varied from sample to sample. Till now, almost all the gelatin samples contain Metson, and Metsox is found only in some of the samples involved.

Key words: gelatin, amino acid, methionine, sulfone, sulfoxide

LI XUN, PENG BI-XIAN, XIAO YU-XIA, NI JING-HUA. STUDY OF PHOTOGRAPHIC PROPERTY OF GELATIN MACROMOLECULE Ⅰ. THE DETERMINATION OF METHIONINE SULFONE AND SULFOXIDE CONTAINED IN PHOTOGRAPHIC GELATINS[J]. Imaging Science and Photochemistry, 1993, 11(2): 40-44.

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STUDY OF PHOTOGRAPHIC PROPERTY OF GELATIN MACROMOLECULE Ⅰ. THE DETERMINATION OF METHIONINE SULFONE AND SULFOXIDE CONTAINED IN PHOTOGRAPHIC GELATINS

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