Determination of acetaldehyde in ground water by auto headspace-gas chromatography

The determination method of acetaldehyde in ground water by auto headspace-gas chromatography was established.And the parameters of the headspace sampler such as vial pressuring time,loop temperature,loop equal time,sample loopfill time and vial temperature were optimized.The sensitivity and precisions of this method were tested.The result of the study shows that the method not only has better detection limit(0.012 mg/L),relative standard deviation(3.5%) and linear correlation coefficient(0.999 8) than manual headspace,but also improves the detection efficiency significantly.