US EPA

1751878 

Technical Report 

Determination of Chrysotile Content of Asbestos Cement Dusts by IR-Spectroscopy 

Hlavay, J; Antal, L; Gyorgy-Pozsonyi, L; Inczedy, J 

1984 

0 

Fresenius' Zeitschrift für Analytische Chemie
ISSN: 0016-1152 

SPRINGER VERLAG 

NEW YORK 

NIOSH/00192020 

319 

547-551 

WOS:A1984TT96100012 

A new pellet preparation technique was developed for the quantitative determination of chrysotile (12001295) in asbestos (1332214) cement sediments. Samples of standard asbestos cement and sediments were gathered from various sampling sites. Pellets were prepared by the dilution method using ethanol to avoid agglomerization of the primary particles. According to the preliminary infrared and x-ray diffraction measurements, the industrial asbestos cement samples contained only chrysotile. Therefore, the study focused only on the quantitative determination of chrysotile. Optimal grinding time of the raw and standard samples was determined. Four grams of asbestos were ground in a tungsten carbide swing grinding mill for up to 1 hour and samples taken after 5, 15, 30, and 60 minutes. Infrared spectra and x-ray powder diffractograms were recorded. The results indicated that by the end of the grinding period the crystalline structure of the asbestos was completely destroyed. In actual deposited samples taken from various sites in an asbestos cement factory, 10 to 500 microgram chrysotile/milligram concentrations were found. 

DCN-187476; Lemen; Construction materials; Cement industry; Analytical chemistry; Chemical analysis; Asbestos cement; Quantitative analysis; Physical properties