Development of a new real-time method for measuring S(IV) in cloud water using a counter-flow virtual impactor

Autor: Robert J. Charlson, Roy W. Dixon
Jazyk: angličtina
Rok vydání: 2011
Předmět:
Zdroj: Tellus B; Vol 46, No 3 (1994)
Dixon, Roy W.; & Charlson, Robert J.(1994). Development of a new real-time method for measuring S(IV) in cloud water using a counter-flow virtual impactor. Tellus B, 46(3), 193-204. doi: 10.1034/j.1600-0889.46.issue3.1.x. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2zn70498
ISSN: 0280-6509
1600-0889
DOI: 10.1034/j.1600-0889.46.issue3.1.x.
Popis: A new method of analysis for S(IV) is described incorporating a counter-flow virtual impactor for collection and evaporation of cloud droplets with an SO2 analyzer. This technique allows analysis of aqueous S(IV) concentration in real-time and overcomes some sampling or analysis problems of conventional sampling with bulk cloud water collectors and wet chemical analysis methods. The technique is demonstrated by the correlated responses of the S(IV) instrument and instruments measuring physical properties of clouds while passing in and out of clouds. Measured aqueous S(IV) concentrations ranged from the detection limit (0.1 nmol per m3 of air) to 1.8 nmol m-3 in clouds in Ohio. S(IV) molar concentrations (moles/l of cloud water) were not calculable from these measurements, but can be calculated when a measurement of the liquid water content of the collected cloud water is made simultaneously.DOI: 10.1034/j.1600-0889.46.issue3.1.x
Databáze: OpenAIRE
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