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A Dichotomous Sampler for TRIG Aerosol and Vapor.

Authors
Rando-RJ; Lefante-JJ; Poovey-HG
Source
Section of Environmental Medicine, Department of Medicine, Tulane University School of Medicine, New Orleans, Louisiana 1995 Jun:51 pages
Link
NIOSHTIC No.
00235378
Abstract
An analytical technique was developed to reliably measure total reactive isocyanate group (TRIG) in workplace atmosphere samples and the technique was adapted for use in a dichotomous sampler that would separately collect and measure TRIG in the vapor and condensed phases. Three candidate derivatizing agents for TRIG measurement were evaluated: methoxy-phenylpiperazine (MOPIP), 9-methylamino- methylanthracene (MAMA), and tryptamine (TRYP). Six commercial formulations of isocyanate oligomers/polyurethane prepolymers were assayed by derivation with MAMA followed by high performance liquid chromatography with ultraviolet absorbance and fluorescence detection. A dichotomous sampler consisting of an impactor inlet in series with two sections of annular denuder tube followed by a backup filter was used to study the partitioning of 4,4'- diphenylmethane-diisocyanate (101688) between the vapor phase and condensed phase in an atmosphere of condensation aerosol ranging from 24 to 335 micrograms/cubic meter. Test atmospheres of HDI vapor and of 1,6-hexamethylenediisocyanate (822060) 1,6- hexamethylenediisocyanate-biuret (4035896) aerosols were generated and sampled with the dichotomous sampler using MAMA reagent. The dichotomous sampler was used to measure vapor and condensed phase TRIG in workplace atmospheres.
Keywords
NIOSH-Grant; Grants-other; Air-quality-monitoring; Air-sampling-techniques; Isocyanates; Plastics-industry; Industrial-hygiene;
Contact
Medicine Tulane University 1700 Perdido St New Orleans, LA 70112
CAS No.
101-68-8; 822-06-0; 4035-89-6; 108-19-0
Publication Date
19950622
Document Type
Final Grant Report;
Funding Amount
209735.00
Funding Type
Grant;
Fiscal Year
1995
NTIS Accession No.
PB97-155683
NTIS Price
A05
Identifying No.
Grant-Number-R01-OH-02664
NIOSH Division
OEP
Priority Area
Other Occupational Concerns; Grants-other;
Source Name
Section of Environmental Medicine, Department of Medicine, Tulane University School of Medicine, New Orleans, Louisiana
State
LA;
Performing Organization
Tulane University of Louisiana, New Orleans, Louisiana
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