Evaluation of the applicability of Fourier Transform Infrared (FTIR) spectroscopy for quantitation of the components of airborne solvent vapors in air.
Am Ind Hyg Assoc J 1989 Jul; 50(7):360-365
The use of Fourier Transform Infrared (FTIR) spectroscopy, for monitoring of computer generated simulated paint solvent mixtures, was demonstrated and optimal conditions for instrument use were detailed. The data were collected using a Nicolet 20 SXC FTIR spectrometer using a liquid nitrogen cooled mercury/cadmium- tellurium detector and a Hanst 10 meter long path cell. Data were collected using 128 coadded interferograms over a range of 5000 to 700/centimeter. Paint solvent composition and concentration information was supplied by automotive industry experts and were representative of typical paints found in the topcoat operations at automotive facilities. A 12 component mixture was chosen. FTIR showed promise for the study but it was noted that the mixtures used did not encompass all possible mixtures in the industry. The authors suggest validation of FTIR for any application that is significantly different from that reported. The least squares fit software was useful for the quantitation of strongly overlapped multicomponent mixtures. Quantitation can be performed to levels far below the threshold limit values for mixtures of solvents with known composition. At concentrations below 0.5 parts per million the issue of nonlinearity is still unresolved. Additional parameters to consider include the question of vapor phase versus aerosol bound solvent concentration in the paint spray booth and the applicability of the use of remote sensing FTIR.
NIOSH-Publication; NIOSH-Grant; Organic-solvents; Solvent-vapors; Air-quality-monitoring; Analytical-instruments; Analytical-chemistry; Chemical-analysis; Workplace-studies; Painters; Automotive-industry; Quantitative-analysis
Environmental & Indust Health School of Public Health II 1420 Washington Heights Ann Arbor, MI 48109-2029
American Industrial Hygiene Association Journal
University of Michigan at Ann Arbor, Ann Arbor, Michigan