DENUDER-BASED TECHNIQUES FOR SAMPLING, SEPARATION AND ANALYSIS OF GASEOUS AND PARTICULATE MERCURY IN AIR

A denuder-based method for sampling and separating gaseous and particu late mercury in the air is described. Two different denuder configurat ions developed in Vilnius, Lithuania (silver) and in Gothenburg, Swede n (gold) are compared. Data were acquired at different sampling locati ons around the cities of Vilnius and Gothenburg. The concentration of particulate Hg was found to be 0.04 to 0.40 ng m(-3) in the Vilnius re gion, and 0.11 to 0.57 ng m(-3) in the Gothenburg region. Intercalibra tion results for the silver and gold denuders are presented. The resul ts obtained by the two different denuder configurations and sampling s et-ups display satisfactory agreement.