Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleLetter to the editor.AuthorsMathur, D.; Grino, P.; Brenton, A. G.PublicationRapid Communications in Mass Spectrometry: RCM, 1992, Vol 6, Issue 7, p484ISSN0951-4198Publication typeArticleDOI10.1002/rcm.1290060716