Abstract
SUMMARYA method for the characterization of surface‐treated asbestos fibres with electron microscopy is presented. Electron spectroscopic imaging (ESI) of organosilane‐treated chrysotile asbestos fibres has been carried out. Initially, the region below the carbon edge was inspected in ESI mode for its effectiveness as a background correction. Elemental mapping was performed on standard untreated fibres to take into account non‐characteristic signals from extrapolation errors and camera artefacts. The highest resulting pixel value that results from non‐characteristic signals was used as a threshold for further background correction in the net images. Samples for electron energy‐loss spectroscopy were prepared in two different ways, either by gluing on grids, or by using perforated carbon foils. The results show that the use of a conducting carbon film is necessary for the analysis of such electrically insulating asbestos fibres. Focusing of the electron beam on the individual fibres results in a thermal effect promoting the evaporation of the organosilane reaction products.
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