Analysis of aliphatic petroleum resin by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry

Abstract

Aliphatic petroleum resin is one of the most important tackifiers. In the present work Escorez 1202, a representative aliphatic petroleum resin, was analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). The ionizing agent used was silver trifluoroacetate ; the matrices examined were dithranol, pyrene, trans,trans-1,4-diphenyl-1,3- butadiene, 9-nitroanthracene, anthracene, 2,5-dihydroxybenzoic acid, retinoic acid, 3-indolacrylic acid and 2-(4-hydroxyphenylazo)benzoic acid. The optimum matrix found was anthracene and the radical cations were observed without using an ionizing agent. Two adhesive tapes were treated with 2-butanone, and the 2-butanone extracts were analyzed by MALDI-TOF-MS. It was proved that an aliphatic petroleum resin was mixed in each adhesive. © 2008 The Japan Society for Analytical Chemistry.