Gas-Solid Chromatography Studies Using Activated Charcoals Treated With 4-Vinylpyridine

摘要

The present paper reports the performance of a series of 4-vinylpyridine-impregnated charcoals as gas-solid chromatograph columns in the retention of water, a series of alcohols (methanol, ethanol, n-propanol, iso-propanol, n-butanol, tert-butanol), and several hydrocarbons (methane, ethane, propane, cyclopropane). The 4-vinylpyridine loading ranged up to 30% by weight. The activated charcoal was a coal-based one with a surface area of about 1000 sq m/gm. The use of activated charcoal in gas chromatography centers around the analysis of low boiling gases and hydrocarbons. Treatment of activated charcoal with 4-vinylpyridine led to decreases in both retention times and heats of adsorption for the organics examined. Increasing the 4-vinylpyridine content resulted in further decreases; an exception was noted with water in which case a minimum in the retention time was noted with charcoals containing 3% to 5% 4-vinylpyridine.