A SYSTEM FOR THE SAMPLING IN INHALABLE AIRBORNE PARTICLES

This paper describes an instrument developed for the semi-continuous m easurement of aerosol mass and its classification into three classes. These classes have been chosen to evaluate the health hazards caused b y inhalable particles. The instrument takes samples through three prob es, each providing different cut-off points (approximately 15 mum, app roximately 4 mum, approximately 2 mum) and collects airborne particles on circular membrane filters. The increase in weight is measured by t he beta-ray attenuation method.