Comparison of Woods Extractives Coming from Species Commonly used in Manufactures of Wood

Wood extractives are considered commonly of major importance for the wood toxicity. Probably the first step of illness is the penetration of toxic molecules into human corpus, so we examine and compare extractives coming from woods commonly in Morocco industry. We solvate extractives from direct wood powder in water, sodium chloride solution and ringer salt solution. Dry powder of extractives woods are then characterize by IR spectra. We found great correlation between group of IR peaks that limit the independent peaks at five, each of them being characteristics of one or more chemical bonds. Comparing the peaks intensity between the free solvent show a selectivity effect of salts against the chemical bonds present into the extracts.