Field measurement of lead in workplace air and paint chip samples by ultrasonic extraction and portable anodic stripping voltammetry.
American Industrial Hygiene Conference and Exposition, June 1-6, 2002, San Diego, California. Fairfax, VA: American Industrial Hygiene Association, 2002 Jun; :27
On-site measurement of lead in workplace air filter and paint chip samples by ultrasonic extraction and anodic stripping voltammetry (UE/ASV) was evaluated in the field during renovation and remodeling activities. Field UE/ASV lead data were compared to U/atomic absorption (AA) and hot plate digestion/AA results from fixed-site laboratory lead measurement. Determination of lead in air filter samples by UE/ASV was extremely well correlated with lead measurement by UE/AA and hot plate digestion/AA procedures. However, a significant negative bias due to ASV measurement was observed, and this was attributed to a matrix effect. Land measurement in paint chip samples by UE/ASV was well-correlated with lead measurement by UE/AA and hot plate digestion/AA procedures. However, precision was lower for lead measurement in paint samples as compared to aerosol samples, and a negative bias was also observed. Lead measurements by UE/AA were compared to lead determinations by hot plate digestion/AA; these data were well correlated and demonstrated no significant bias. It was concluded that the ultrasonic extraction procedure performed equivalently to hot plate digestion. Matrix effects due to paint chip particles resulted in greater imprecision (compared to aerosol samples) as well as negative bias by UE/ASV measurement.
Lead-compounds; Lead-dust; Samplers; Air-filters; Workplace-monitoring; Workplace-studies; Ultrasonic-testing
American Industrial Hygiene Conference and Exposition, June 1-6, 2002, San Diego, California