Abstract
A method has been developed for the identification of mercaptans in petroleum fractions by reaction with trialkyltin reagents. The derivatives formed have been characterized and quantified by 119Sn n.m.r. spectrometry. Sulphides in petroleum fractions were first reduced to thiols by calcium in liquid ammonia. The thiols were then derivatized with bis(tri-n-butyltin) oxide (TBTO) and characterized in situ by 119Sn n.m.r. spectroscopy. This study also shows that a unique chemical shift may be attributed to each class of sulphydryl-containing compound.
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