title: A sample-bottle purging method for the determination of vinyl chloride in water at submicrogram per liter levels.
abstract: Methodology is presented for the concentration, detection and measurement of vinyl chloride (VC) in water at a maximum sensitivity of 0.1 mug/1 by gas chromatography, using the halogen specific microcoulometric titration detector. The methodology eliminates cyanogen chloride (CNCI) as a potential interference by using a 180 mm X 4 mm i.d. GC column packed in the first one-third with Chromosorb 101, and in the second two-thirds with Chromosorb 102; a procedure for purging the sealed sample bottle itself is utilized as a means of analyzing larger samples, while at the same time avoiding the loss of VC by volatilization which occurred when the sample was transferred to a purging device. A method of verifying the accuracy of standard solutions that utilizes a new device called a "Reaction Coulometer," is also included and a detailed description of how to convert the inlet system of the Tracor MT 220 gas chromatograph to a desorbing device is provided.
mesh_terms: D002849:Chromatography, Gas; D008722:Methods; D008832:Microchemistry; D014752:Vinyl Chloride / Q000032:analysis*; D014753:Vinyl Compounds / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014753:Vinyl Compounds; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D014752:Vinyl Chloride