Studies and microdetermination of some organic sulfur functions by reduction with titanium(III) sulfate solution

Gawargious, Y. A.

doi:10.1016/0026-265x(71)90060-9

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1974

1989

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“…Excess titanium ( ) sulfate has been used to reduce sulfoxides and disulfides (31). Titration of the excess reagent with ferric alum allows an analysis of these compounds.…”

mentioning

confidence: 99%

Functional group analysis

Smith¹,

Patterson²

1974

Anal. Chem.

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“…Excess titanium ( ) sulfate has been used to reduce sulfoxides and disulfides (31). Titration of the excess reagent with ferric alum allows an analysis of these compounds.…”

mentioning

confidence: 99%

Functional group analysis

Smith¹,

Patterson²

1974

Anal. Chem.

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Determination of unmodified methionine and methionine sulphoxide in food proteins by gas–liquid chromatography

Duncan¹,

Ellinger²,

Glennie³

1984

J Sci Food Agric

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A method for the reduction of methionine sulphoxide to methionine using titanium trichloride is described. This method, coupled with the gas chromatographic determination of rnethionine after reaction with CNBr, measures methionine sulphoxide by the increase in methionine values after reduction with titanium trichloride. Results obtained for total methionine by gas chromatography after reduction and CNBr reaction, showed close agreement with those obtained by ion-exchange chromatography after performic acid oxidation. This method was applied to pure proteins which had been subjected to hydrogen peroxide oxidation, and to a wide range of food proteins. An evaluation of other, but less effective, reducing agents is briefly discussed.

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