Abstract：In order to make a systematic analysis on the speciations of chromium in atmospheric particulate matter, a simple analysis system was established for chromium speciations of atmospheric particulates. Firstly, the total concentration was determined, then five chromium speciations were determined by Tessier method,including exchangeable state, bound to carbonates, bound to organic matters and residual, bound to Fe-Mn. With p H=9.5 Na₂CO₃-Na HCO₃ buffer solution processing of atmospheric particulate matter extracts, Cr speciations in atmospheric particulate matter of several villages in the north of China was analyzed. The results show that the recovery rate of Cr is 75.4% ~104.31%,the total concentration of Cr is 172.21 ng/m L, Cr⁶⁺concentration is169.28 ng/m L, and the^Cr3+concentration is 2.99 ng/m L,the RSD of^Cr6+and ^Cr3+are 8.76% and 17.68% respectively.

Keywords: atmospheric particulate matters; chromium; speciations; system analysis