Abstract
Chemical modification of wool often involves cleavage of sulphur–sulphur bonds in cystine residues, and in certain circumstances carbon–sulphur-bond cleavage also occurs. The extent of the latter has been a subject for speculation, since no methods exist for its estimation. This paper describes a convenient technique for concurrent hydrolysis of wool and oxidation of cystine and related amino acids to cysteic acid (oxidative hydrolysis). When subjected to oxidative hydrolysis, sorne wools, which have been modified by alkali or cyanide treatments or by irradiation, yield less cysteic acid than does untreated wool. This difference provides a measure of the extent of carbon–sulphur fission caused by the modification treatment.
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