PMID: 16509343Mar 3, 2006Paper

Versatile gas/particle ion chromatograph

Environmental Science & Technology
S M Rahmat UllahPurnendu K Dasgupta

Abstract

A new, compact gas/particle ion chromatograph has been developed for measuring ionic constituents in PM2.5 (particulate matter of aerodynamic diameter < or = 2.5 microm) and water-soluble ionogenic gases. The instrument has separate sampling channels for gases and particles. In one, a membrane denuder collects soluble gases for preconcentration and analysis. In the other, a cyclone removes larger particles, a membrane denuder removes soluble gases, and a continuously wetted hydrophilic filter collects particles. A single, multiport, syringe pump handles liquid transport, and one conductivity detector measures anions and ammonium for both channels. Electrodialytically generated gradient hydroxide eluent permits 20 min chromatographic runs. Gas/particle samples are each collected for 40 min, butthe sampling intervals are staggered by 20 min. Liquid samples from the gas denuder and particle collector are aspirated and preconcentrated on sequential cation and anion concentrators and transferred respectively to an ammonia transfer device and an anion separation column. The flow configuration results in an ammonium peak before anion peaks in the chromatogram. The system measures ammonia, organic acids (such as acetic, formic, and oxa...Continue Reading

References

Dec 15, 2000·The New England Journal of Medicine·J M SametS L Zeger
Jan 14, 2004·Environmental Science & Technology·Rida Al-HorrPurnendu K Dasgupta
Feb 14, 2004·Analytical Chemistry·Masaki TakeuchiPurnendu K Dasgupta
Jul 19, 2005·Journal of the Air & Waste Management Association·Federico M San MartiniGregory J McRae
Dec 15, 2005·Analytical Chemistry·Masaki TakeuchiAllen Williams
Jun 1, 1995·Environmental Science & Technology·P K Simon, P K Dasgupta

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Citations

Jul 19, 2008·Annual Review of Analytical Chemistry·Kimberly A PratherVicki H Grassian
Aug 11, 2011·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Masaki TakeuchiYoshimi Shiramizu
Feb 2, 2008·The Science of the Total Environment·B K LeeD S Lee
Jan 11, 2013·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Masaki TakeuchiHideji Tanaka
Jun 11, 2009·Journal of Environmental Monitoring : JEM·Xiaohong YaoGreg J Evans

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