S. Nakamura et al., Analysis of waterborne paints by gas chromatography-mass spectrometry witha temperature-programmable pyrolyzer, J CHROMAT A, 912(2), 2001, pp. 329-334
Gas chromatography-mass spectrometry (CC-MS) with a temperature-programmabl
e pyrolyzer was used for the analysis of waterborne paints. Evolved gas ana
lysis (EGA) profiles of the waterborne paints were obtained by this tempera
ture-programmed pyrolysis directly coupled with MS via a deactivated metal
capillary tube. The EGA profile suggested the optimal thermal desorption co
nditions for solvents and additives and the subsequent optimal pyrolysis te
mperature for the remaining polymeric material. Polymers were identified fr
om pyrograms with the assistance of a new polymer library. The solvents wer
e identified from the electron ionization mass spectra with the correspondi
ng chemical ionization mass spectra. The additive was identified as zinc py
rithione by comparison with authentic standard. Zinc pyrithione cannot be a
nalyzed by GC-MS as it is. However, the thermal decomposition products of z
inc pyrithione could be detected. The information on the decomposition temp
erature and products was useful for the identification of the original comp
ound. (C) 2001 Published by Elsevier Science B.V.