Abstract
Nickel(II) chelates of four tetradentate Schiff bases, bis(acetylacetone)ethylenediimine (H 2AA 2en), bis-(acetylacetone)propylenediimine (H 2AA 2pn), bis(acetylacetone)- dl-stilbenediimine ( dl-H 2AA 2S) and bis(acetylacetone)- meso-stilbenediimine ( meso-H 2AA 2S), were examined as stationary phases for gas chromatography. The complexes were coated with 3% OV-101 in the range 3–5%. The phases were packed in stainless-steel columns (3 m × 3 mm I.D.) and were examined for the separation of saturated aromatic hydrocarbons, heteroaromatic aldehydes, ketones, amines and alcohols. Kováts retention indices of alsohols, aldehydes and ketones increased with improvement in the separation when using mixed stationary phases, particularly 3% OV-101-5% dl-AA 2SNi compared with 3% OV-101.
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