title: Properties of a novel linear sulfur response mode in a multiple flame photometric detector.
abstract: A new linear sulfur response mode was established in the multiple flame photometric detector (mFPD) by monitoring HSO* emission in the red spectral region above 600nm. Optimal conditions for this mode were found by using a 750nm interference filter and oxygen flows to the worker flames of this device that were about 10mL/min larger than those used for monitoring quadratic S2* emission. By employing these parameters, this mode provided a linear response over about 4 orders of magnitude, with a detection limit near 5.8×10(-11)gS/s and a selectivity of sulfur over carbon of about 3.5×10(3). Specifically, the minimum detectable masses for 10 different sulfur analytes investigated ranged from 0.4 to 3.6ng for peak half-widths spanning 4-6s. The response toward ten different sulfur compounds was examined and produced an average reproducibility of 1.7% RSD (n=10) and an average equimolarity value of 1.0±0.1. In contrast to this, a conventional single flame S2* mode comparatively yielded respective values of 6.7% RSD (n=10) and 1.1±0.4. HSO* emission in the mFPD was also found to be relatively much less affected by response quenching due to hydrocarbons compared to a conventional single flame S2* emission mode. Results indicate that this new alternative linear mFPD response mode could be beneficial for sulfur monitoring applications.
authors.affiliation: Department of Chemistry, University of Calgary, Calgary, AB, Canada T2N 1N4.
authors.forename: Adrian G
authors.initials: AG
authors.lastname: Clark
authors.affiliation: Department of Chemistry, University of Calgary, Calgary, AB, Canada T2N 1N4. Electronic address: thurbide@ucalgary.ca.
authors.forename: Kevin B
authors.initials: KB
authors.lastname: Thurbide
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation; D057230:Limit of Detection; D010783:Photometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D013457:Sulfur Compounds / Q000032:analysis*
chemical_list: D013457:Sulfur Compounds
keywords: Detection; Linear; Multiple flame; Photometric; Sulfur