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(Top) Calibration results for signal ratio of oxygen to nitrogen vs set mole fraction of ethanol at different pressures and temperatures (errorbars: standard-deviation of 32 single spectra); (bottom) deconvolution of range v̅ = (1330 to 1570) cm–1 for calibration spectra of different mole fractions at T = 522 K and p = 8 MPa.
