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Hexavalent Chromium |
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| Exposure
Evaluation |
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Occupational exposure to hexavalent chromium can occur from inhalation of dusts,
mists, or fumes containing hexavalent chromium, or from eye or skin contact with
hexavalent chromium. The following references provide information on exposure
limits and analytical methods used to evaluate hexavalent chromium exposure.
Exposure Limits
- Chromium (VI) (Hexavalent Chromium).
OSHA Chemical Sampling Information. Includes exposure limits set by OSHA, the National Institute for Occupational Safety and
Health (NIOSH), and the American Conference of Governmental Industrial Hygienists (ACGIH) for hexavalent chromium compounds.
OSHA Methods
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OSHA has developed and validated methods for use by the Salt Lake Technical Center
(SLTC) laboratory. The following methods have been adopted by many
laboratories for the analysis of chemical compounds.
- Hexavalent Chromium.
Method
W-4001, (2001, April). Describes the procedures for wipe sampling
of hexavalent chromium.
- Hexavalent Chromium in Workplace Atmospheres. Method
ID-215, (1998, June). Also available as a 319 KB
PDF, 35 pages. Describes the sample collection and analysis of airborne hexavalent chromium.
- For air sampling, the recommended method is ID-215, version 2 (see
below). The original June, 1998, method is still listed as it contains
sections still applicable for wipe and bulk sampling of materials to
analyze for hexavalent chromium.
- The original June, 1998, method lists a proposed OSHA PEL for Cr(VI)
of 0.5 ug/m3 and AL of 0.25 ug/m3, but these were not issued in the
final rule [OSHA
Federal Register Final Rules 71:10099-10385].
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Hexavalent Chromium. Method ID-215 (Version 2), (2006, April).
National Institute for Occupational Safety and Health
(NIOSH) Methods
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Chromium, Hexavalent by Ion Chromatography.
Method No.7605, (2003, March 15), 102 KB
PDF, 3
pages. Describes the sample collection and analysis of hexavalent
chromium. This method is similar to OSHA Method ID-215.
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Chromium, Hexavalent by Field-Portable Spectrophotometry.
Method No. 7703, (2003, March 15), 104 KB
PDF, 5
pages. Describes Method No. 7703 as a field portable method of analysis of hexavalent
chromium.
- Chromium, Hexavalent, In Settled Dust Samples. Method
No. 9101, (1996, May 15), 8 KB PDF,
1 page. Describes an estimation of the soluble hexavalent chromium content of settled dust.
- Chromium, Hexavalent. Method No. 7600, (1994, August 15),
24 KB PDF, 4 pages.
Describes sampling and analysis of
airborne hexavalent chromium.
- Chromium, Hexavalent. Method No. 7604, (1994, August 15),
308 KB PDF,
3 pages. Indicates this method is less sensitive than method 7600
(colorimetric), but it contains fewer sample preparation steps.
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