suggesting common source. P was highly correlated with O
and Mg which was also observed by XRD analysis and is
present in the Pune atmosphere as a mineral Mg2P4O12
(Fig. 3).
To determine the associations between elements which
correspond to the main elements observed and generated
by diverse emission sources, factor analysis was attempted
on entire data set. Soot particles were not considered in the
factor analysis therefore it has been discussed separately.
Table 3 presents the loading of the main groups of particles
present in Pune site (SPSS, ver. 16). On the basis of the
factors acquired, morphology and composition of PM of
that factor is discussed as under.