AUTOMATIC MONITORING-SYSTEM FOR ACID-RAIN AND SNOW BASED ON ION CHROMATOGRAPHY

In order to investigate the mechanism of acid precipitation formation, its relationship with meteorological conditions and the source of pol lutants contained in it, it was found to be much more important to kno w the distribution of the concentrations of various ions such as C1(-) , NO3-, SO42-, Na+, K+, NH4+, Ca2+ and Mg2+ than its pH and electrical conductivity that used to be chiefly monitored. A reliable monitoring system for acid precipitation was developed by combining an improved pH electrical conductivity monitor and an ion chromatograph. Chemical data obtained by continuous precipitation monitoring were correlated w ith meteorological data.