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An evaluation of Fourier transform infrared (FTIR) spectroscopy for detecting organic solvents in expired breath.

Authors
Yost-MG; Rose-MA; Morgan-MS
Source
Appl Occup Environ Hyg 2003 Mar; 18(3):160-169
NIOSHTIC No.
20029277
Abstract
The aim of this study was to test the performance of gas-phase FTIR analysis on human breath samples. Ten volatile organic compounds (VOC) were examined for applicability to FTIR spectroscopy (ethanol, ethylbenzene, n-hexane, methyl ethyl ketone, methyl tert-butyl ether, m-xylene, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and toluene). Three sets of detection limits (LOD) were determined for comparison. LOD(1) were generated from partial least squares (PLS) calibration methods using spectroscopic software, LOD(2) from spiked breath samples, and LOD(3) from blank breath samples. Mixed expired breath samples from four subjects were spiked at varying levels with four different VOC (hexane, methyl ethyl ketone, m-xylene and 1,1,1-trichloroethane) to validate spectral data and test overall accuracy. Breath samples spiked with m-xylene also were validated by GC/FID analysis. PLS-derived LOD(1) ranged from 0.06-2.47 ppm. Spiked breath sample LOD(2) ranged from 0.52-1.21 ppm. Blank breath LOD(3) measurements ranged from 0.17-1.70 ppm, except for ethanol, which had an LOD of 11.2 ppm. Predicted concentrations for carbon dioxide (slope = 1.06), m-xylene (slopes = 1.19, 1.21), and methyl ethyl ketone (slope = 0.93) were fairly accurate, while concentrations were underpredicted for n-hexane (slope = 0.69) and 1,1,1-trichloroethane (slopes = 0.58-0.66).
Keywords
Organic-solvents; Organic-compounds; Breathing; Sampling; Biological-monitoring; Environmental-health-monitoring; Organic-chemicals; Inhalation-studies; Solvents
CODEN
AOEHE9
Publication Date
20030301
Document Type
Journal Article
Funding Amount
355444
Funding Type
Grant
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003134
Issue of Publication
3
ISSN
1047-322X
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Applied Occupational and Environmental Hygiene
State
WA
Performing Organization
University of Washington, Seattle, Washington
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