Investigations into the determination of hydroxylamine in viscosity-stabilised natural rubber
1996
Crafts, R.C. | Davey, J.E. (Tun Abdul Razak Research Centre, Brickendonbury, Hertford (United Kingdom))
The current method for the determination of hydroxylamine in viscosity stabilized (CV) rubber relies on the use of 0.75M sulphuric acid as the extractant. This work demonstrates that equally complete extraction can be accomplished using much milder extraction conditions. An ion chromatographic method for determining hydroxylamine has been developed and found to give results comparable to the established UV colorimetic method. The new chromatographic procedure has been used to clarify the concept of "free hydroxylamine" and to test whether the established colorimetic procedure was, indeed, determining 'free' hydroxylamine. The opportunity has also been taken to establish whether the newer grades of CV rubber now being produced have 'free' and measureable hydroxylamine levels comparable with those established grades. Premilimary attempts to extend the work to vulcanised compounds are also described.
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