Determination of microgram quantities asbestos by x-ray diffraction: chrysotile in thin dust layers of matrix material.

Details

• Personal Author:
  Haartz JC ; Lange BA
• Description:
  An X-ray diffraction (XRD) method was developed to measure microgram quantities of chrysotile asbestos (1200195) in pure or matrix material samples. Chrysotile and talc samples were ground and deposited on silver membrane filters. The filters were ashed prior to analysis. Ultrasonic treatment reduced particle size and increased sensitivity. Comparable results were obtained when the raw net densities were normalized by an external or substrate standard. X-ray absorption corrections were necessary to reduce measurement errors. Detection limits were 2 micrograms of fiber per square centimeter for both pure and matrix samples. The authors conclude that this XRD method is specific for chrysotile, has a low detection limit, and offers excellent precision. It can accurately measure small amounts of chrysotile in the presence of large amounts of matrix material, when determinations by the counting method are generally difficult. This technique could be automated, and may be applied to other asbestiform materials. The authors recommend sample pretreatment and X-ray line profile analysis to reduce interference from other minerals. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Asbestos Dust Inorganic Chemicals Occupational Health Particulate Matter Radiography Respiratory Tract Diseases Safety
• Keywords:
  Airborne-dusts Analytical-methods Asbestos-fibers Detectors Measurement-instrumentation NIOSH-Author Respiratory-system-disorders X-ray-diffraction-analysis
• ISSN:
  0003-2700
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DBBS - Division of Biomedical and Behavioral Sciences
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  51
• Issue:
  4
• NIOSHTIC Number:
  nn:00094753
• Citation:
  Anal Chem 1979 Apr; 51(4):520-525
• Contact Point Address:
  B. A. Lange, U.S. Department of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Cincinnati, Ohio 45226
• Federal Fiscal Year:
  1979
• NORA Priority Area:
  Pulmonary System Disorders
• Peer Reviewed:
  True
• Source Full Name:
  Analytical Chemistry
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:6b05c99126724d91fcb7a8b4a5fdcf8f7610011637573358c2002d42f40a759bda63659f44c23cfc0d3386a18568ff3e294605a6490e321ba2a45b709fcc550b
• Download URL:
  https://stacks.cdc.gov/view/cdc/184341/cdc_184341_DS1.pdf
• File Type:
  [PDF - 829.45 KB ]