Published: Journal of Chromatographic Science, Volume 37, Number 4, April 1999, pp. 126-132.
Gas-Phase Molecular Absorption Spectrometry as a Gas Chromatography
Detector:Determination of Alcohols
I. Sanz-Vicente1, S. Cabredo1, and J. Galbán
A mixture containing methanol, ethanol, 2-propanol, 1-butanol, 1-pentanol, 1-hexanol, benzyl alcohol, phenol, 2,4-dimethylphenol, 2,3-dimethylphenol, and 2-nitrophenol is analyzed using a simple detection system for gas chromatography based on molecular absorption spectrometry in the gas phase. All of the parameters affecting the determination are optimized, including solvent, temperature, carrier gas flow, type of flow cell, injection volume, and measurement wavelength. The analytical characteristics of each compound are calculated, obtaining detection limits ranging from 2.5 to 15 mg/L for aromatic alcohols and from 47 to 120 mg/L for lineal alcohols. The method is applied to several synthetic mixtures with good results.
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