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Measurement of 2,4-toluene diisocyanate concentrations by different samplers

Tsai, CJ and Lin, HC and Shih, TS and Chang, KC and Hung, IF and Deshpande, CG (2006) Measurement of 2,4-toluene diisocyanate concentrations by different samplers. Journal of Hazardous Materials, 137 (3). pp. 1395-1401.

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Abstract

The standard sampling methods for toluene diisocyanate (TDI) only collect total TDI without separating the aerosol and gas phases. There are few other samplers, such as the dual filter, triple filter and annular denuder systems (ADS), which are able to sample the aerosol and gas phases simultaneously. This field study was conducted at two workplaces to access the total 2,4-TDI and the gaseous and aerosol TDI concentrations by different samplers simultaneously. In addition to the standard sampling time of 15 min, sampling was done for 30 and 60 min to study the effect of sampling time on the measured 2,4-TDI concentrations. Test results at two workplaces show that gas-phase 2,4-TDI is the predominant species and the aerosol phase concentration is very small. The measurements using various samplers show that the sampling time influences the sampled TDI concentration considerably which may be due to reaction of TDI with water vapor and polyo in the sampling process. It is evident that as sampling time increases the TDI concentration decreases. Laboratory test was also conducted using pure gas-phase 2,4-TDI to confirm the sampling time effect on the measured concentrations found in the field study. © 2006 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: Denuder sampler; Filter sampler; Sampling methods; Toluene diisocyanate, Aerosols; Aromatic compounds; Concentration (process); Filters (for fluids); Industrial emissions; Vapors, Phase separation, toluene diisocyanate, Aerosols; Aromatic compounds; Concentration (process); Filters (for fluids); Industrial emissions; Phase separation; Vapors, aerosol; air sampling; aromatic hydrocarbon; filter; gas; sampler, aerosol; air sampling; article; chemical analysis; concentration (parameters); gas; measurement; occupational exposure; sampler; separation technique; standard; workplace, Toluene 2,4-Diisocyanate
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 25 Dec 2014 06:48
Last Modified: 25 Dec 2014 06:48
URI: http://moeseprints.incois.gov.in/id/eprint/1933

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