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Ann. occup. Hyg., Vol. 48, No. 1, pp. 75-84, 2004
© 2004 British Occupational Hygiene Society
Published by Oxford University Press

Determination of Short-term Exposure with a Direct Reading Photoionization Detector

P. POIROT1,*, I. SUBRA1, F. GÉRARDIN1, V. BAUDIN2, S. GROSSMANN3 and M. HÉRY4

1 Département Ingénierie des Procédés; 2 Service Epidémiologie en Entreprise; 3 Département Polluant et Santé; 4 Direction Scientifique, INRS, BP 27, F-54501 Vandoeuvre Cedex, France

Received 21 October 2002; in final form 12 June 2003

The use of a direct reading photoionization detector (PID) to determine short-term solvent exposures is described in the present paper. To assess the relevance of such a total exposure evaluation it was necessary to compare it with the real concentration of pollutants. This comparison was made by measuring in parallel with the PID determination the concentration of each pollutant using a standard technique, i.e. sampling on charcoal tubes and subsequent analysis by gas chromatography. Laboratory tests showed that the linearity of the answer of the PID is good for many compounds and for a mixture of these compounds. Similar tests were carried out for painters in workplaces with the same good correlations (determination coefficient r2 close to 1) between the PID response and the real concentration of the pollutants measured on the sampling tubes. The use of PID also allowed determination of the exposure profile of the workers and comparison of the short-term exposure to the corresponding limit values. Many cases of the short-term limit values being exceeded were revealed by use of the PID, although very few cases of the long-term limit values have been found by the usual sampling (charcoal tube) and analytical (gas chromatography) methods.

Keywords: photoionization detector; short-term exposure; solvent; limit values


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