MONITORING OF ATMOSPHERIC SULFUR-DIOXIDE BY FLUORESCENCE MONITORING-SYSTEM

A fluorescence monitoring system was used to measure gaseous sulfur di oxide at Taoyuan Agricultural Farm. A gas-diluting system and gas chro matograph equipped with a sulfur chemiluminescence detector used to au dit the accuracy of diluted sulfur dioxide are described. The accuracy was -8% and -2%, respectively, for the preparation of 10 and 50 ppb S O2 standard gas. The pattern of variation of SO2 concentration at Taoy uan Agricultural Farm is reported. In summer at Taoyuan Agricultural F arm, the concentration of SO2 varied with a pattern of night concentra tion (15-20 ppb) greater than that in the afternoon (0-2 ppb). Compute r-analyzed wind trajectories in Taiwan for this pattern are reported.