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APCA Notebook

The Sampling and Electron Microscopy of Asbestos Aerosol in Ambient Air By Means of Nuclepore Filters

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Pages 496-498 | Published online: 13 Mar 2012
 

Abstract

Despite the fact that adverse health effects of asbestos have been known since shortly after the turn of the century,1 there has been little progress in techniques for determining the mineral in the airborne state. This absence of sampling and analysis methods appears to derive from two main sources: (1) In the environments of the asbestos using industries, asbestos concentrations tend to be high relative to other particulate species, and especially compared with other fibrous species, making estimation of concentration by microscopy relatively easy. (2) The term "asbestos" describes a crystal habit, not a chemical compound; therefore there is no unique chemical property of asbestos that can be used as the basis for its measurement. Interestingly, there appears to be no basis for distinguishing the health effects of one type of asbestos over another;2 the physiological response seems more dependent on crystal habit than on composition.

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