Fourier transform infrared least-squares methods for the quantitative analysis of multicomponent mixtures of airborne vapors of industrial hygiene concern

Journal Article · Sat Apr 01 00:00:00 EST 1989 · Anal. Chem.; (United States)

OSTI ID:6191095

Li-shi, Y; Levine, S P

Air monitoring methods suitable for use in the workplace, though accurate for monitoring individual compounds or classes of compounds, cannot be used to monitor several compounds or classes of compounds simultaneously. In the past few years, Fourier transform infrared (FT-IR) spectroscopy have been investigated for use as a method for multicomponent quantitative analysis. This work focuses on quantitative analysis of six mixtures in ambient air. The concentration ranges of the two- to six-component mixtures are from 50 ppm to 100 ppb. The optimal least-squares fit (LSF) method selected, background reference file chosen, and quantitative peak windows picked were evaluated in this effort. The quantitative results of six mixtures were accurate at the 50, 10, and 1 ppm levels. There were some components for which the analysis was also accurate at the 0.1 ppm level. The data indicate that the LSF program could be used to quantify strongly overlapping multicomponent mixtures. The results support the conclusion that the FT-IR spectrometer is appropriate for the direct quantification of multicomponent mixtures of many airborne gases and vapors of industrial hygiene concern.

• Research Organization: Univ. of Michigan, Ann Arbor (USA)
• OSTI ID: 6191095
• Journal Information: Anal. Chem.; (United States), Vol. 61:7
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AIR
QUANTITATIVE CHEMICAL ANALYSIS
AIR POLLUTION MONITORS
PERFORMANCE
FOURIER TRANSFORM SPECTROMETERS
ORGANIC COMPOUNDS
AIR POLLUTION MONITORING
TOXIC MATERIALS
AIR POLLUTION
AIR QUALITY
EXPERIMENTAL DATA
INFRARED SPECTRA
LEAST SQUARE FIT
MIXTURES
OCCUPATIONAL EXPOSURE
TRACE AMOUNTS
VAPORS
CHEMICAL ANALYSIS
DATA
DISPERSIONS
ENVIRONMENTAL QUALITY
FLUIDS
GASES
INFORMATION
MATERIALS
MAXIMUM-LIKELIHOOD FIT
MEASURING INSTRUMENTS
MONITORS
NUMERICAL DATA
NUMERICAL SOLUTION
POLLUTION
SPECTRA
SPECTROMETERS
400102* - Chemical & Spectral Procedures
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)