The Efficiency of Alkaline Extraction for the Recovery of Hexavalent Chromium (CrVI) from Paint Samples and the Effect of Sample Storage on CrVI Recovery

Details

• Personal Author:
  Froines JR ; Luk KK ; Sabty-Daily RA
• Description:
  Workplace exposures to CrVI, a human carcinogen, are significant in spraying operations of chromate-containing paints. Accurate determination of CrVI in paint aerosol air samples is important in assessing a worker's exposure to CrVI. National Institute for Occupational Safety and Health method 7604 is widely used for determining CrVI in air samples. It utilizes an alkaline extraction procedure. It was historically validated for paint aerosol samples containing 24.5 to 61.5 ug of CrVI. The literature documented potential airborne CrVI exposures greater than 61.5 ug in recent paint spraying operations. The efficiency of the alkaline method at extracting CrVI from paint samples containing 250 to 3000 ug of CrVI was determined. Paint was prepared, sampled, extracted twice and then digested. Extracts were analyzed for CrVI and digestates of the residual Cr were analyzed for total Cr. Alkaline extraction of paint samples using NIOSH method 7604 resulted in quantitative recoveries for paint samples with CrVI filter loadings from 250 to 3000 ug. A decrease in CrVI extraction efficiency was observed in samples containing >1000 ug of CrVI. A second extraction improved the recovery of CrVI in these samples. Refrigerating paint aerosol samples for up to 2 weeks did not affect their CrVI content. [Description provided by NIOSH]
• Subjects:
  Aerosols Chromates Chromium Occupational Health Paint Safety
• Keywords:
  Hexavalent Chromium Paints Paint Spraying Spraying Operations Spray Painting
• ISSN:
  0003-2654
• Document Type:
  Text
• Funding:
  Grant ; Cooperative Agreement
• Genre:
  Journal Article
• Place as Subject:
  California ; North Carolina ; OSHA Region 4 ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  127
• Issue:
  6
• NIOSHTIC Number:
  nn:20057920
• Citation:
  Analyst 2002 Jun; 127(6):852-858
• Contact Point Address:
  John R. Froines, University of California, Los Angeles, Center for Occupational and Environmental Health, School of Public Health, Los Angeles, CA 90095-1772, USA
• Email:
  jfroines@ucla.edu
• CAS Registry Number:
  Chromium(6+) (CAS RN 18540-29-9)
• Federal Fiscal Year:
  2002
• Performing Organization:
  University of California, School of Public Health, Los Angeles, California
• Peer Reviewed:
  True
• Start Date:
  19990701
• Source Full Name:
  Analyst
• End Date:
  20040630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1160fa0bfbf9731c5a7d90463d91b9141a66f4163c7326bb904a4fdf51bdba5c44016c70f0e883bb3a73c3d3a1d82e5204e62eebb12cc291f587e9f8dd2e17ed
• Download URL:
  https://stacks.cdc.gov/view/cdc/215124/cdc_215124_DS1.pdf
• File Type:
  [PDF - 134.04 KB ]