Determination of vinyl chloride monomer in pvc pipes for drinking water supply by dissolution precipitation-headspace-gas chromatography
Objective To establish a method for the determination of vinyl chloride monomer in PVCpipes for drinking water supply by dissolution precipitation-headspace-gas chromatography.Methods VF-624 capillary column was used as the separation column.PVC pipes were dissolved with 3 ml of N,N-dimethylacetamide(DMA)solution,and then added 1 ml water for precipitation.Headspace gas chromatographic analysis was carried out at 80℃ equilibration for 20 min.Results The linearity of vinyl chloride was good in the range of 0.02-0.25 mg/L,with correlation coefficient of 0.999 5.The average recoveries were 86.8％-92.2％,while the relative standard deviations(RSD)were 2.2％-4.7％,and the limit of detection was 0.016 mg/kg.Conclusion The method has the advantages of simple operation,high sensitivity,good accuracy and precision,and can be used for the determination of vinyl chloride monomer in PVC pipes for drinking water supply.
万方数据
维普
