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Abstract

A commercial flame photometric detector (FDP) normally used for SO-2 determinations has been adapted to continuous sulphate measurements in ambient air. As described, the modification consisted in adapting an appropriate inlet system composed of a coated lead oxide denuder for the removal of gaseous sulphur compounds, and a controlled heater to maintain a steady flame inside the detector. With a detection limit of the order of 4 mug SO-4**2-/m**3, the modified analyser can be favourably used for comparative measurements. In the Ispra region, the sulphates well correlated with the visibility are one of the constituents of the summer haze. The measurements gave evidence of ammonium sulphate aerosol formation by photochemical conversion of SO-2 emitted by local sources. These measurements are compared with some data from an EEC campaign in the site of Fos-Berre (France), a heavily industrialized and polluted area."

Additional information

Authors: PAYRISSAT M, JRC ISPRA ESTAB. (ITALY);NICOLIN B, JRC ISPRA ESTAB. (ITALY);STANGL H JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: PHYSICO-CHEMICAL BEHAVIOUR OF ATMOSPHERIC POLLUTANTS, VARESE (ITALY), APRIL 10-12, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER F 31438 ORA
Availability: Can be ordered online
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