PM10 samples were collected in Guangzhou during haze and normal days in the summer and the winter. Water soluble ions, organic carbon (OC) and element carbon (EC) in PM10 were analyzed. Concentrations of the component in PM10 descended in the order of OC>NO-3>SO2-4>NH 4>EC in haze days, (but OC>SO2-4>EC>NH 4>NO-3 in normal days) which were 4.7, 12.5, 3.7, 3.2 and 2.3 times than that in normal days, respectively. Correlative analysis showed that concentrations of TC (OC EC) and NO-3 had significantly negative effect on visibility in haze days, but TC and SO2-4 had that in normal days. |