Development and Optimization of a Sampling and Analytical Method to Measure Hexavalent Chromium in Ambient Air: Research Project Summary
Date
2010-11
Date Removed
Journal Title
Journal ISSN
Volume Title
Publisher
Trenton, N.J. : New Jersey Department of Environmental Protection, Office of Science
Abstract
The overall goal of this study was to develop a sensitive and reliable method for the measurement of ambient
airborne hexavalent chromium [Cr(VI)] by systematically evaluating and optimizing the sampling, sample
processing and analytical processes. This method can also simultaneously quantify the inter-conversion rates
between Cr(VI) and trivalent chromium [Cr(III)] and the recovery rate of Cr(VI). The specific aims of this study
are: 1) to optimize the (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) to reduce the Cr(VI) background level on the blank filter; 3) to determine
the recovery and conversion rate of Cr(VI) and Cr(III) during sampling, storage and extraction; 4) to characterize the factors that have been suggested to potentially affect the stability of Cr(VI), i.e., particle types, relative
humidity (RH), temperature (T), ozone (O3
), sulfur dioxide (SO2
) and nitrogen dioxide (NO2
) in ambient air; and
5) to evaluate the developed method in the field during summer and winter seasons.
Description
Keywords
New Jersey