Sensory and Analytical Evaluations of Paints With and Without Texanol

Perception of odor can figure prominently in complaints about indoor air, yet identification of the responsible compound(s) is often difficult. For example, paint emissions contain a variety of odorous volatile organic compounds (VOCs) which may trigger reports of irritation and upper respiratory he...

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Bibliographic Details
Published inEnvironmental science & technology Vol. 42; no. 1; pp. 243 - 248
Main Authors Gallagher, Michelle, Dalton, Pamela, Sitvarin, Laura, Preti, George
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 01.01.2008
Subjects
Adolescent
Adult
Air Pollution, Indoor - analysis
Applied sciences
Construction Materials
Environmental Measurements Methods
Exact sciences and technology
Female
Gas Chromatography-Mass Spectrometry
Glycols
Humans
Hydrocarbons - analysis
Male
Middle Aged
Odorants - analysis
Paint
Pollution
Smell
Volatilization
Olfactometry
Hydrocarbon
Pollutant behavior
Volatile organic compound
Identification
Pollutant emission
Solid phase microextraction
Persistence
Gas chromatography
Additive
Health and environment
Indoor pollution
Air pollution
Aromatic compound
Odor
Mass spectrometry
Public health
Organic compounds
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Summary:Perception of odor can figure prominently in complaints about indoor air, yet identification of the responsible compound(s) is often difficult. For example, paint emissions contain a variety of odorous volatile organic compounds (VOCs) which may trigger reports of irritation and upper respiratory health effects. Texanol ester alcohol (2,2,4-trimethyl-1,3-pentanediol monoisobutyrate), a paint coalescing agent, is frequently associated with the “persistent, characteristic odor” of water-based paint. To evaluate the sensory impact of Texanol, naïve (unfamiliar with paint constituents) and experienced (familiar with paint constituents) subjects evaluated the odor properties of paints with and without Texanol. VOC emissions from neat paint and paint applied to gypsum wallboard were collected via solid-phase microextraction and analyzed by gas chromatography/mass spectrometry and gas chromatography/olfactometry. Regardless of subjectsʼ prior experience, aromatic hydrocarbons and oxygenated compounds, introduced from other paint additives and not Texanol, were most commonly associated with paint odor. However, quantitative sensory techniques demonstrated that addition of Texanol to paints led to an overall increase in the perceived intensity of the coating. The combined use of these techniques proved to be an effective methodology for analyzing the structure of paint volatiles and their sensory properties and holds promise for solving many odorous indoor air problems.
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Details regarding the paint formulations, the GC/MS, the GC/O and olfactory acuity can be found in descriptions S1-S4, respectively. Table S1 provides the composition information of paint ingredients. Tables S2 and S3 provide sensory evaluations (GC/O) of Paints A and B (neat) by the naïve subjects. Table S4 provides quality evaluations by paint chemists of wallboards painted with Paints A, B, and C at three different time points post painting. The sensory evaluations (GC/O) of Paint A, B, and C (after 24 h postpainting) by the paint chemists can be found in Table S5. This material is available free of charge via the Internet at http://pubs.acs.org.
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ISSN:0013-936X
1520-5851
DOI:10.1021/es071555y