Determination of Acetaldehyde,Acrylaldehyde and Acrylonitrile in Water with Headspace Gas Chromatography

A headspace gas chromatography method was developed for the simultaneous determination of acetaldehyde,acrylaldehyde and acrylonitrile in water.Acetaldehyde,acrylaldehyde and acrylonitrile in water samples were extracted by headspace technology,then seperated with HP-innowax capillary column and detected by FID.Retention time of the peaks was used for qualitative analysis,while external standard method was used for quantitative analysis.The lowest detection limits were 0.04 mg/L for acetaldehyde,0.02 mg/L for acrylaldehyde and 0.01 mg/L for acrylonitrile.The recovery rates were 95.2% ～ 98.7% for acetaldehyde,95.8% ～ 97.9% for acrylaldehyde and 96.7% ～ 99.6% for acrylonitrile.And RSD(n = 6) were lower than 5.2%.This method is simple,rapid,accurate and applicable for determination of acetaldehyde,acrylaldehyde and acrylonitrile in various water samples.