A comparison of two sampling methods for the detection of airborne methylene bisphenyl diisocyanate.
J Occup Environ Hyg
; 10(4): 213-21, 2013.
Article
en En
| MEDLINE
| ID: mdl-23442121
The purpose of this study was to determine if there was a significant difference between two readily available sampling methodologies for airborne methylene bisphenyl diisocyanate (MDI), which is an essential precursor in the spray-on truck bed lining industry. Seventy-two personal airborne samples of MDI were collected and analyzed from nine spray-on truck bed liner businesses in northern Colorado. Wide ranges of exposure concentrations were encountered during the spray-on application, including concentrations that exceeded the OSHA permissible exposure limit. The highest airborne MDI concentration measured was 690 ppb. A statistically significant difference between field-desorbed and laboratory-desorbed methods was determined. The field-desorbed sampling methodology yielded consistently higher MDI concentrations than the laboratory-desorbed sampling methodology, which suggests that immediate desorption minimizes isocyanate loss and potential underestimations. Results from the analysis of variance also indicated that different facility factors and environmental conditions within each company, such as the use of ventilation or humidity level, affected the MDI concentrations, indicating the potential for better mitigation of exposures using the hierarchy of controls.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Monitoreo del Ambiente
/
Exposición Profesional
/
Isocianatos
/
Contaminantes Atmosféricos
Tipo de estudio:
Diagnostic_studies
País/Región como asunto:
America do norte
Idioma:
En
Revista:
J Occup Environ Hyg
Asunto de la revista:
MEDICINA OCUPACIONAL
/
SAUDE AMBIENTAL
Año:
2013
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Reino Unido