Abstract
The application of matrix isolation-FTIR spectroscopy for the product analysis of reaction systems in atmospheric chemistry is described. A mixture of Ar and O2 with a molar composition of 80% and 20%, respectively, is used as carrier gas. The Ar/O2 matrix deposited at 7±1 K exhibits an O2-doublet absorption band centred at 1550 cm−1 and 1551.5 cm−1 which can be used as an internal reference for calibration purposes. The reaction products isolated in the Ar/O2 matrix give sharp and well-defined absorption bands which are suitable for quantitative analysis. Various procedures and associated problems in the calibration are discussed in detail. The matrix isolation-FTIR technique was applied to the ozonolysis of simple alkenes and the photooxidation of biacetyl.
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