Physicist, National Oceanic and Atmospheric Administration, Boulder, CO
Pages: 19 Published: Jan 1990
Intentional sulfur doping of the flame photometric detector results in a quasilinear response with a linear dynamic range of ∼100, a significantly reduced detection limit of ∼3 pg of sulfur, and a graphic display of interferences caused by response quenching. The use of Teflon for all sample lines and valves is shown to result in significantly smaller analyte losses for several important volatile sulfur species including SO2, CH3SCH3 [dimethyl sulfide (DMS)], and H2S. Ozone interference is shown to be a major problem in the quantitation of ambient levels of DMS using both solid sorbant and cryogenic enrichment techniques. The relative merits of several ozone removal procedures are discussed.
toxics, atmospheric sulfur, volatile sulfur, flame photometric detector (FPD), dimethyl sulfide, cryogenic enrichment, sulfur gas enrichment, surface losses
Paper ID: STP17190S