A new individual respirable air sampler was designed, and is now available. This very compact device, named CIP 10, uses a high-speed rotating cup, containing a polyurethane foam, which ensures the suction of air at the flow-rate of 10 l. min −1 and traps the respirable particles. Particle size selection is obtained by combining impaction in a first stage with air filtration through porous static foam having well defined characteristics. After a complete description of the instrument, its sampling and particle collection parameters are determined in calm air conditions using two test aerosols: coal dust and aluminium oxide (Aloxite 50). Two different grades for the static selective foam are studied: 45 and 60 pores per inch (18 and 24 cm −1 ). It is shown that the data obtained with grade 45 closely match the conventional selectivity for the alveolar fraction of an ambient aerosol as defined by the ISO.
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Courbon et al. (1988) studied this question.