Simple cryoconcentration technique for the determination of peroxyacyl and alkyl nitrates in the atmosphere.
A gaseous mixture of methyl nitrate, n-propyl nitrate, peroxyacetyl nitrate and peroxypropionyl nitrate was successfully cryoconcentrated using a gas sampling valve with its loop filled with glass beads placed inside the GC oven which was cooled at -50 degrees C. The technique offered linearity over a ten fold concentration variation and sample volume range of 1-280 ml. The detection limit for 150 ml sample varied from 0.02-10 pptv depending on the compound.
Moschonas
N
N
University of Patras, Department of Chemistry, Hellas, Greece.
Glavas
S
S
D001272:Atmosphere / Q000737:chemistry*; D002849:Chromatography, Gas / Q000379:methods; D005615:Freezing; D009566:Nitrates / Q000032:analysis*; D010463:Peracetic Acid / Q000031:analogs & derivatives* / Q000032:analysis; D010545:Peroxides / Q000032:analysis
D009566:Nitrates; D010545:Peroxides; C049329:peroxypropionyl nitrate; C421035:propyl nitrate; D010463:Peracetic Acid; C421036:methyl nitrate; C004185:peroxyacetyl nitrate