[Study on analysis of trace phenol in small amount of aqueous sample by liquid-liquid micro-extraction and gas chromatography]. 
A method for the liquid-liquid micro-extraction and gas chromatographic analysis of trace phenol in small amount of aqueous sample has been developed.  The influences of acid and salts on recovery rate of phenol were examined.  And, the influences of injection speeds and the conditions of silica wool in injection port on the quantitation precision were tested.  With a direct injection port, an FID and a DB-1 capillary column of wide bore, a detection limit of 1 microgram. L-1 can be obtained employing 8 mL water sample, 160 microL ethyl acetate and 3.5 g ammonium sulfate.  The added recoveries were in the range of 95.0%-98.5%.  The relative standard deviations were in the range of 2.8%-3.3%.  This method is simple, convenient, rapid, accurate and practical.