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EXPOSURE AND EMISSION EVALUATIONS OF METHYL ETHYL KETOXIME (MEKO) IN ALKYD PAINTS
Citation:
Chang*, J.C S., Z Guo*, AND L E. Sparks*. EXPOSURE AND EMISSION EVALUATIONS OF METHYL ETHYL KETOXIME (MEKO) IN ALKYD PAINTS. INDOOR AIR 8(4):295-300, (1998).
Impact/Purpose:
Published Journal Article
Description:
Small environmental chamber tests were conducted to characterize the emissions of a toxic chemical compound -- methylethylketoxime (MEKO) -- from three different alkyd paints. It was found that MEKO emissions occurred almost immediately after each alkyd paint was applied to a pine board. Due to the fast emission pattern, more than 90% of the MEKO emitted was released within 10 hours after painting. The peak concentrations of MEKO in chamber air correlated well with the MEKO content in the paint. Material balance showed that good recovery (more than 68%) was achieved between the MEKO applied with the paint and the MEKO emitted. The chamber data were simulated by a first order decay emission model assuming the MEKO emissions were mostly gas-phase mass transfer controlled. The model was used to predict indoor MEKO concentrations during and after painting in a test house. It was found that the predicted test house MEKO concentrations during and after the painting exceeded a suggested indoor exposure limit of 0.1 mg/m3 for all three paints. The predicted MEKO concentrations exceeded even the lower limit of a suggested sensory irritation range of 4 to 18 mg/m3 with two of the three paints tested. The model was also used to evaluate and demonstrate the effectiveness of risk reduction options including selection of lower MEKO paints and higher ventilation during painting.
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EXPOSURE AND EMISSION EVALUATIONS OF METHYL ETHYL KETOXIME (MEKO) IN ALKYD PAINTS
EXPOSURE AND EMISSION EVALUATIONS OF METHYL ETHYL KETOXIME (MEKO) IN ALKYD PAINTS (PDF, NA pp, 2427 KB, about PDF)