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State of New Jersey Department of Environmental Protection
State of New Jersey Department of Environmental Protection
Development and Optimization of a Sampling and Analytical Method to Measure Hexavalent Chromium in Ambient Air

Funded by: United States Environmental Protection Agency

Principle Investigator: Zhihua (Tina) Fan, Ph.D. Assistant Professor
Exposure Science Division, Environmental and Occupational Health Sciences Institute
University of Medicine and Dentistry of NJ - Rutgers University

Project Period: June 29, 2007 through June 30, 2009.

The overall goal of this proposed study is to develop a reliable, sensitive sampling and analytical method to measure hexavalent chromium [Cr(VI)] in ambient air. Previous work from the Urban Community Air Toxics Monitoring Project, Paterson City, NJ (UCAMPP), found many sampling and analytical artifacts which can influence the measured concentration of Cr(VI) in ambient air. The main objectives of this study are to: 1) optimize the Ion Chromatography-Inductively Coupled Plasma Mass Spectrometry (IC/ICPMS) method for Cr(VI) analysis, e.g., lower the detection limit to the one in a million risk level i.e., 0.083 ng/m3; 2) characterize sampling and analytical artifacts that can impact the measured concentration of Cr(VI) in ambient air, e.g., stability of Cr(VI) during sampling, storage and extraction; 3) characterize the effect of environmental conditions on Cr(VI) stability during sampling, e.g., aerosol type and composition, pH, relative humidity (RH), temperature (T), ozone (O3), sulfur dioxide (SO2) and nitrogen dioxide (NO2) in our Controlled Environment Facility (CEF), which is a stainless steel chamber designed for controlled human exposure studies at the Environmental and Occupational Health Sciences Institute (EOHSI); and 4) test our method under various real world environmental conditions. A secondary objective is to develop a method that can quantitatively determine total and water soluble Cr(VI) in ambient air particles. The results obtained from the proposed study will enrich the United States Environmental Protection Agency (USEPA) Air Monitoring method database, and contribute to the national and local ambient air monitoring, exposure and risk assessment for Cr(VI).

Return to Chromium Research Page

 

Research Project Summary (November 2010)

Full Report

 

 

 


Office of Science
Dr. Gary A. Buchanan, Manager

Mailing Address:
Mail code 428-01, P.O. Box 420
P.O. Box 420
Trenton, NJ 0862
Office Location:
428 East State St., 1st floor
Trenton, NJ 08625
Phone: (609) 984-6070
Fax: (609) 292-7340


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Copyright State of New Jersey, 1996-2009
P. O. Box 402
Trenton, NJ 08625-0402

Last Updated: November 12, 2010