Ann. occup. Hyg., Vol. 17, No. 2, pp. 97-109, 1974
© 1974 British Occupational Hygiene Society
Published by Oxford University Press
research-article |
A MICRO/MACROTECHNIQUE FOR THE EVALUATION OF IRONFOUNDRY DUST SAMPLES
Laboratorio de Higiene Industrial, Centro Asistencial, Mondragón, Spain
A micro/macrotechnique used for the assessment of silicosis dust hazard in a Spanish iron foundry is described, and the results obtained are given. The procedure is based on the elimination of the filter by dissolution, so that it does not interfere with the gravimetric measurements (total respirable dust and incinerated respirable dust concentration) and the determination of quartz by i.r. spectrophotometry. This dissolution method of separating the sample from the filter was found to give reproducible results and a high level of recovery. The i.r. method for the determination of quartz was found to be applicable to respirable ironfoundry dust in certain conditions. Given the viability of the i.r. method, the technique described provides a simple, quick and reliable procedure for the evaluation of dust samples obtained with the personal sampler even where the dust concentrations are low.