Document Detail

Field measurement of acid gases and soluble anions in atmospheric particulate matter using a parallel plate wet denuder and an alternating filter-based automated analysis system.
MedLine Citation:
PMID:  11922292     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We present a new fully automated instrument for the measurement of acid gases and soluble anionic constituents of atmospheric particulate matter. The instrument operates in two independent parallel channels. In one channel, a wet denuder collects soluble acid gases; these are analyzed by anion chromatography (IC). In a second channel, a cyclone removes large particles and the aerosol stream is then processed by another wet denuder to remove potentially interfering gases. The particles are then collected by one of two glass fiber filters which are alternately sampled, washed, and dried. The washings are preconcentrated and analyzed by IC. Detection limits of low to subnanogram per cubic meter concentrations of most gaseous and particulate constituents can be readily attained. The instrument has been extensively field-tested; some field data are presented. Results of attempts to decipher the total anionic constitution of urban ambient aerosol by IC-MS analysis are also presented.
C Bradley Boring; Rida Al-Horr; Zhang Genfa; Pumendu K Dasgupta; Michael W Martin; William F Smith
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Analytical chemistry     Volume:  74     ISSN:  0003-2700     ISO Abbreviation:  Anal. Chem.     Publication Date:  2002 Mar 
Date Detail:
Created Date:  2002-03-29     Completed Date:  2002-04-18     Revised Date:  2003-11-03    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1256-68     Citation Subset:  -    
Department of Chemistry and Biochemistry, Texas Tech University, Lubbock 79409-1061, USA.
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