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  1. Biological monitoring of triethylamine among cold-box core makers in foundries.

    Article - En anglais

    Objectives 

    The objectives of the study were to assess triethylamine (TEA) exposure in cold-box core making and to study the applicability of urinary TEA measurement in exposure evaluation.

    Methods 

    Air samples were collected by pumping of air through activated-charcoal-filled glass tubes, and pre-and postshift urine samples were collected.

    The TEA concentrations were determined by gas chromatography.

    Design 

    Tea was measured in air and urine samples from the same shift.

    Breathing-zone measurements of 19 workers in 3 foundries were included in the study, and stationary and continuous air measurements were also made in the same foundries.

    Pre-and postshift urine samples were analyzed for their TEA and triethylamine-N-oxide (TEAO) concentrations.

    Results 

    The TEA concentration range was 0.3-23 mg/m3 in the breathing zone of the core makers.

    The mean 8-h time-weighted average exposure levels were 1.3,4.0, and 13 mg/m3 for the three foundries.

    Most of the preshift urinary TEA concentrations were under the detection limit, whereas the postshift urinary TEA concentrations ranged between 5.6 and 171 mmol/mol creatinine.

    The TEAO concentrations were 4-34% (mean 19%) of the summed TEA+TEAO concentrations.

    The correlation between air and urine measurements was high (r=0.96, P<0.001).

    A TEA air concentration of 4.1 mg/m3 (the current ACGIH 8-h time-weighted average threshold limit value) corresponded to a urinary concentration of 36 mmol/mol creatinine. (...)

    Mots-clés Pascal : Procédé boite froide, Industrie métallurgique, Fonderie, Exposition professionnelle, Médecine travail, Homme, Surveillance biologique, Urine, Liquide biologique, Triéthylamine

    Mots-clés Pascal anglais : Cold box process, Metallurgical industry, Foundry, Occupational exposure, Occupational medicine, Human, Biological monitoring, Urine, Biological fluid

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 98-0028159

    Code Inist : 002B03L06. Création : 17/04/1998.