[Comparative study, with photoelectron spectroscopy of the adsorption of phospholipids by 3 fibrous silicate minerals (chrysotile, crocidolite, attapulgite)].

The method used in this study for preparing mineral samples has allowed us to obtain a highly reproducible surface state, which in turn means that we can better exploit the results of the XPS analysis. With high initial concentrations, the three minerals studied appeared to be covered with a bilayer of phospholipids. The greatest adsorption was obtained with initial phospholipid concentrations of 100, 150 and 300 micrograms/ml for crocidolite, chrysotile and attapulgite respectively. It would appear that these differences in surface reactivity can be related to the different levels of risk associated with the inhalation of these fibres.