Selection and characterization of fibrous and nonfibrous amphiboles for analytical methods development.

Details

• Personal Author:
  Draftz RG ; Haartz JC ; Lange BA ; Scholl RF
• Description:
  Mineral samples were characterized to determine their suitability for use as reference materials in the development of new analytical methods to determine workplace contaminants. Fifty fibrous and prismatic (nonfibrous) amphibole (1332214) samples were collected from various sources. Only 38 were carried through the preliminary characterization steps before 11 were chosen for closer study. Specimens that required beneficiation to liberate pure minerals were separated by hand. Fibrous amphiboles were ground in a fiber mill for size reductions. Prismatic amphiboles were ground using a jet mill. Fibrous and prismatic tremolite (14567738) samples with a mean particle length or diameter of less than 3.0 micrometers were studied by chemical analysis, X-ray diffraction, and differential thermal analysis. All the samples were determined to be tremolite according to the chemical analysis. Samples as small as 20 micrograms could be quantified using X-ray diffraction. Peak intensities were determined. The peak ratios for prismatic tremolite were larger than for samples of fibrous tremolite. Differential thermal analysis gave good calibration curves but was not sensitive enough to detect microgram quantities of tremolite. The authors conclude that X-ray diffraction analysis has potential applications for analysis of workplace contaminants. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution, Indoor Asbestos Chemistry Dust Environmental Monitoring Inorganic Chemicals Minerals Occupational Health Particulate Matter Radiography Safety Silicon Dioxide

  More +
• Keywords:
  Air-contamination Air-monitoring Air-sampling Airborne-contaminants Airborne-dusts Analytical-methods Asbestos-dusts Author Keywords: Amphibole Asbestos Chemical-analysis Chemical-processing Cummingtonite Dusts Fibrous-dusts Grunerite Mineral-dusts Mineral-processing Silica-dusts Thermal Analysis Tremolite X-ray-diffraction-analysis X-ray Diffraction

  More +
• ISSN:
  0083-1883
• Publisher:
  National Bureau of Standards, U.S. Department of Commerce
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  District of Columbia ; Maryland ; Ohio ; OSHA Region 3 ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DPSE - Division of Physical Sciences and Engineering
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  295-312
• NIOSHTIC Number:
  nn:00146041
• Citation:
  Workshop on Asbestos: Definitions and Measurement Methods. Gravatt CC, LaFleur PD, Heinrich KFJ, eds. Washington, DC: National Bureau of Standards, U.S. Department of Commerce, NBS Special Publication No. 506, 1978 Nov; :295-312
• CAS Registry Number:
  Asbestos (CAS RN 1332-21-4) ; Cummingtonite ((Fe0.31-0.7Mg0.3-0.69)7Si8(OH)2O22) (CAS RN 17499-08-0) ; Tremolite (Ca2[(Mg0.9-1Fe0-0.1)4.5-5Al0-0.5](Si7.5-8Al0-0.5)(OH)2O22) (CAS RN 14567-73-8)
• Editor(s):
  Gravatt CC; LaFleur PD; Heinrich KFJ
• Federal Fiscal Year:
  1979
• Peer Reviewed:
  False
• Source Full Name:
  Workshop on Asbestos: Definitions and Measurement Methods
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9bd113fdcf2cd72e5ff1065c0e1f4ed182f0566c2b167be2aa72222a029fa52c44ffe5cd5d74eafa2d18bcd6fb4c53e3b1e293d3eb197c617f5baf93100e7a28
• Download URL:
  https://stacks.cdc.gov/view/cdc/184818/cdc_184818_DS1.pdf
• File Type:
  [PDF - 5.14 MB ]