System analysis of Cr speciations of atmospheric particulate matters
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 pH=9.5 N a2CO3-NaHCO3 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/mL,Cr6+ concentration is 169.28 ng/mL,and the Cr3+ concentration is 2.99 ng/mL,the RSD of Cr6+ and Cr3+ are 8.76％ and 17.68％ respectively.
Keywords：atmospheric particulate matterschromiumspeciationssystem analysis
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)