Recent developments in airborne dust monitoring.

Many ambient pollutants are in particulate form arid there is a need to sample them for a variety of reasons. A wide range of samplers is available for different purposes but, unfortunately, there does not seem to be a very good understanding of the reasons governing the choice of samplers for different tasks. The present paper attempts to address some of these problems by reviewing briefly the types of sampler used for collecting airborne dust in the ambient atmosphere and the reasons for their choice. Special attention is given to sampler performance and to wind effects on performance, since this is one of the main features of the atmosphere affecting sampler behaviour. Some recent developments in sampler design are discussed. A shorter version of this paper was originally presented as a lecture by the first author to the Investigation of Air Pollution Standing Conference in June 1992, following which it was extended and adapted by the second author for use as lecture notes to an MSc course on Integrated Pollution Control. In view of the great interest tpat has been shown in this subject, it was felt that the work merited a wider audience and it has been extended again to form the present paper.