Elemental contents in particulate matters of 13 sizes from 30 nm to 10000 nm were determined by using synchrotron radiation X-ray fluorescence(SRXRF).X-ray absorption near-edge structure(XANES) spectra of S chemical speciation in the particulate matter samples were also measured.It was found that ultra-fine particles(< 400 nm) had contributed more to the total mass concentration of the particulate matter in the resident area and suburb

while fine particles(1–10 μm) had contributed more in the industrial district.The results showed that the elemental concentration of particulate matter was highest in the Wusong industrial zone

and some polluted elements

such as Ni

Mn

As and Pb

had been obviously enriched in the fine particles and in the ultra-fine particles.The results of chemical speciation determination demonstrated that S existed mainly as sulfate in particles of different sizes

but some original states of S existed as low valences in the ultra-fine particles of < 100 nm in Wusong industrial zone.