An on-site, field-portable analytical method for the determination of lead in workplace air samples, based on the use of ultrasonic extraction and anodic stripping voltammetry (ASV), was evaluated.
Workplace air samples were obtained using a standard method involving particulate collection onto mixed cellulose ester membrane filters.
Samples were collected at work sites where airborne particulates were generated from the abrasive blasting of lead-containing paint on highway bridges.
Ultrasonic extraction (UE) of air filter samples in diluted nitric acid, followed by portable ASV, was used for the determination of lead.
Also, performance evaluation samples consisting of reference materials of known lead concentration were subjected to the UE-ASV procedure for lead determination.
Confirmatory analyses of the air filters and performance evaluation samples subjected to the UE-ASV lead measurement method were conducted by hotplate digestion in concentrated nitric acid and 30% hydrogen peroxide, followed by inductively coupled plasma-atomic emission spectrometric (ICP-AES) determination of lead.
Recoveries of lead from performance evaluation materials (when using the UE-ASV method) were found to be quantitative.
The performance of the UE-ASV method for lead in air filters was found to be acceptable, as evaluated by comparison with results from hotplate strong acid digestion followed by ICP-AES analysis. (...)
Mots-clés Pascal : Ohio, Etats Unis, Amérique du Nord, Amérique, Lieu travail, Industrie construction, Pont route, Peinture plomb, Maintenance, Nettoyage surface, Nettoyage sablage, Exposition professionnelle, Métal lourd, Plomb, Air, Analyse chimique, Voltammétrie redissolution anodique, Echantillonnage, Filtre membrane, Cellulose ester mixte, Méthode séparation, Méthode ultrasonore, Appareil portatif, Performance
Mots-clés Pascal anglais : Ohio, United States, North America, America, Work place, Construction industry, Road bridge, Lead paint, Maintenance, Surface cleaning, Blast cleaning, Occupational exposure, Heavy metal, Lead, Air, Chemical analysis, Anodic stripping voltammetry, Sampling, Membrane filter, Cellulose mixed ester, Separation method, Ultrasonic method, Portable equipment, Performance
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0490515
Code Inist : 001D16C03. Création : 19/02/1999.