absorptive extraction
1.The essential oil prepared by the absorptive column method and the simultaneous distillated extraction method(SDE) was identified and quantified by GC and GC-MS. The total contents of essential oil by the absorptive column method and SDE were 87.93 and 26.62,respectively. The contents of the alcohols,aldehydes,ketones,esters and nitrogenous compounds by SDE were 3.7,4.0,3.0,4.5 and 5.2 times than those by absorptive column method.
2.Apparent absorption coefficient and pseudo absorption coefficient are adopted so as to remove the influence which the waveform distortion dueto thin bed tuning brings to absorption coefficient extraction. The final instantaneous equivalent absorption coefficient,a true absorption coefficient which reflects real absorptive character of a seismic medium,can be obtained by subtracting the pseudo absorption coefficient(inversely calculated using maximum entropy)from the apparent absorption coefficient we have calculated.
