Determination of hexavalent chromium in sludge incinerator emissions using ion chromatography and inductively coupled plasma mass spectrometry
- Technology Applications, Inc., Cincinnati, OH (United States)
- Environmental Monitoring Systems Lab., Cincinnati, OH (United States)
A unique approach is described using ion chromatography (IC) and inductively coupled plasma mass spectrometry (ICP-MS) for the determination of hexavalent chromium [Cr(VI)] in wastewater sludge incinerator emissions. Quartz fiber filters, spiked with an isotopically enriched ([sup 50]Cr or [sup 53]Cr) chromate salt, were used to collect emission particulates. The enriched Cr(VI) isotope was used to monitor the reduction of Cr(IV) during sample collection using a pseudo-first-order reaction model and to calculate the rate of deposition of native Cr(VI) on the filters. At the end of the sampling period, the Cr(VI) was extracted from the filters with 0.1 N sodium hydroxide and determined by IC using postcolumn derivatization with 1,5-diphenylcarbohydrazide. To determine the ratio of enriched Cr(VI) to the native Cr(VI) emitted from the incinerator, an additional aliquot of the sample extract was preconcentrated by IC and the isotopic composition of the Cr(VI) fraction determined by ICP-MS. 21 refs., 4 figs., 3 figs.
- OSTI ID:
- 6718317
- Journal Information:
- Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 26:10; ISSN ESTHAG; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABUNDANCE
AIR POLLUTION MONITORING
CHROMATOGRAPHY
CHROMIUM
ELEMENTS
ICP MASS SPECTROSCOPY
INCINERATORS
ION EXCHANGE CHROMATOGRAPHY
MASS SPECTROSCOPY
METALS
MONITORING
SEPARATION PROCESSES
SPECTROSCOPY
TRANSITION ELEMENTS