Adsorption-Thermal Desorption-Gas Chromatography Applied to the Determination of Wine Aromas
Headspace techniques have been frequently used to study volatile components in foods. These techniques are nondestructive and, since headspace chemical composition is quite similar to that of food aromas detected by the human nose, a correlation can be established between chemical and sensorial analyses.
A theoretical model for computer simulation of spectral distortions in Wavelength Division Multiplexed (WDM) fiber optic systems due to Stimulated Raman Scattering (SRS) and wavelength dependent linear loss coefficient in optical fibers has been developed and suggested in this paper. The results are compared with the experimental results [1] and are found in excellent agreement. Using this model a spectral inversion method (SIM) is devised for evaluating optical powers to be launched at different wavelength channels in WDM fiber optic systems for minimising the spectral distortions due to SRS and wavelength dependent linear loss coefficient of optical fiber. The results are compared with the already suggested linear approximation method [2]. Some limitations of linear approximation method are removed in this spectral inversion method.