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Original Articles

Survey of new, single-layer architectural paints

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Pages 78-105 | Received 17 Jun 2015, Accepted 27 Oct 2015, Published online: 22 Mar 2016
 

ABSTRACT

A total of 1028 samples of architectural paint were collected from store patrons who purchased paint at a medium-sized building supply store in Edmonton, Alberta, Canada. Information about what surfaces the paint would be applied to was collected from each customer at the time of purchase and the data summarized. The samples were characterized by colour, Fourier transform infrared spectroscopy (FTIR), pyrolysis gas chromatograph-mass spectrometry (py-GC-MS), and scanning electron microscopy-energy dispersive spectrometry (SEM-EDS). After visual colour comparison and FTIR analysis alone, 700 samples could be uniquely identified while the remaining 328 samples were divided into 98 groups, representing 956 indistinguishable pairs; the results after application of these two techniques gave a calculated discrimination power of 99.82%. The application of py-GC-MS and SEM-EDS to the remaining indistinguishable pairs gave only a very modest improvement in further distinguishing the samples. Information about current colour trends and which objects are most likely to be painted, or re-painted, by the general public is also provided.

RÉSUMÉ

Un total de 1028 échantillons de peintures architecturales ont été rassemblés de clients ayant achetés ces peintures à un magasin de matériaux de construction à Edmonton, Alberta, Canada. De l'information au sujet des surfaces sur lesquelles celles-ci seraient appliquées a été recueillie de chacun des individus au moment de l'achat. Les échantillons ont été caractérisés par couleur, par spectroscopie infrarouge à transformée de Fourier (IR-TF), par chromatographie des gaz de pyrolyse couplée à la spectrométrie de masse (py-CPG-SM) et par microscope électronique à balayage équipé d'un détecteur de rayons X (MEB-EDX). Suite à une comparaison visuelle et l'analyse IR-TF seule, 700 échantillons ont pu être identifiés comme étant unique alors que les 328 échantillons restants ont été divisés en 98 groupes, représentant 956 paires indifférenciables; ces deux techniques ont donné un pouvoir discriminant de 99.82%. L'application de la py-CPG-SM et du MEB-EDX aux paires indifférenciables restantes n'a donné qu'une légère amélioration en terme de discrimination. De plus, de l'information est fournie au sujet des tendances de couleurs et des objets couramment peints, ou repeints, par le grand public.

Acknowledgments

The authors wish to thank the hundreds of customers who filled out collection cards and provided paint samples, and the employees and management of the West Edmonton Totem Building Supplies store (now closed). The authors are especially grateful to two former Totem employees, Mr. Clinton Paul, store manager, and Ms. Claudia Elbourne, paint specialist, for their unwavering support of this project. The diligent work of Ms. Dianne Meere, Trace Evidence Services, RCMP National Forensic Laboratory Services – Edmonton, in keeping the pyrolysis-gas chromatograph mass spectrometer well maintained and running, is gratefully acknowledged. The author wishes to thank Mr. Denis Lafleche, Trace Evidence Services, RCMP National Forensic Laboratory Services – Ottawa, for carbon coating the SEM samples.

Disclosure statement

No potential conflict of interest was reported by the authors.

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