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Dichotomous Sampler for TRIG Aerosol and Vapor, Final Performance Report, February 1, 1992-January 31, 1995.

PB97155683

Publication Date	1995
Personal Author	Rando, R. J.; Lefante, J. J.; Poovey, H. G.
Page Count	64
Abstract	An analytical technique was developed to reliably measure total reactiveisocyanate 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 derivatizing agents for TRIG measurement were evaluated: methoxy-phenylpiperazine (MOPIP), 9-methylanthracene (MAMA), and tryptamine (TRYP). Six commerical formulations of isocyanate oligomers/polyurethane prepolymers were assayed by derivation with MAMA followed by high performance liquid chromatography with ultraviolet absorbance and flourescene detection. A dichotomous sampler consisting of an impactor inlet in series with two sections of annular denuder tubefollowed 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 from 24 to 335 micrograms/cubic meter. Test atmospheres of HDI vapor and of 1,6-hexamethylenediisocyanate (822060)/1,6-hexamethyl enediisocyanate-biuret (4035896) areosols 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	Air quality monitoring Samplers Occupational safety and health Industrial hygiene Dichotomus samples Total reactive isocyanate groups Air sampling Isocyanates Plastics industry
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	Tulane Univ., New Orleans, LA. Dept. of Medicine.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199714

Dichotomous Sampler for TRIG Aerosol and Vapor, Final Performance Report, February 1, 1992-January 31, 1995.

Dichotomous Sampler for TRIG Aerosol and Vapor, Final Performance Report, February 1, 1992-January 31, 1995.
PB97155683

Publication Date	1995
Personal Author	Rando, R. J.; Lefante, J. J.; Poovey, H. G.
Page Count	64
Abstract	An analytical technique was developed to reliably measure total reactiveisocyanate 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 derivatizing agents for TRIG measurement were evaluated: methoxy-phenylpiperazine (MOPIP), 9-methylanthracene (MAMA), and tryptamine (TRYP). Six commerical formulations of isocyanate oligomers/polyurethane prepolymers were assayed by derivation with MAMA followed by high performance liquid chromatography with ultraviolet absorbance and flourescene detection. A dichotomous sampler consisting of an impactor inlet in series with two sections of annular denuder tubefollowed 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 from 24 to 335 micrograms/cubic meter. Test atmospheres of HDI vapor and of 1,6-hexamethylenediisocyanate (822060)/1,6-hexamethyl enediisocyanate-biuret (4035896) areosols 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	Air quality monitoring Samplers Occupational safety and health Industrial hygiene Dichotomus samples Total reactive isocyanate groups Air sampling Isocyanates Plastics industry
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	Tulane Univ., New Orleans, LA. Dept. of Medicine.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199714