An evaluation of methods of analysis for alkylamino-oxomethanesulphates.
Three possible ways of determining univalent cation salts of alkylamino-oxomethanesulphonic acids. R-NHCOSO(-)(3)M(+), were examined. Of these methods (gravimetric determination as the urea, as barium sulphate, or by an iodometric method), the iodometric method of estimating the bisulphite liberated from alkylamino-oxomethanesulphonates by decomposition with sodium hydroxide was finally selected and evaluated. Results obtained are in good agreement with theory for R = butyl and R = -(CH(2))(6)-. The iodometric method was equally applicable to polyurethane precursors. Free or excess of bisulphite (and accordingly total bisulphite) was determined successfully in the case of the polymeric adduct.
Reddie
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Division of Protein Chemistry, CSIRO, Parkville Melbourne, Vic. 3052, Australia.
Peters
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