Combined micro-droplet and thin-film-assisted pre-concentration of lead traces for on-line monitoring using anodic stripping voltammetry.
An improved analytical method for airborne lead traces is reported. It is based on using a Venturi scrubber sampling device for simultaneous thin-film stripping and droplet entrapment of aerosol influxes. At least threefold enhancement of the lead-trace pre-concentration is achieved. The sampled traces are analyzed by square-wave anodic stripping voltammetry. The method was tested by a series of pilot experiments. These were performed using contaminant-controlled air intakes. Reproducible calibration plots were obtained. The data were validated by traditional analysis using filter sampling. LODs are comparable with the conventional techniques. The method was successfully applied to on-line and in situ environmental monitoring of lead.
Belostotsky
Inessa
I
Department of Chemistry, Technion Israel Institute of Technology, 32000, Haifa, Israel.
Gridin
Vladimir V
VV
Schechter
Israel
I
Yarnitzky
Chaim N
CN
D000393:Air Pollutants / Q000032:analysis*; D002138:Calibration; D004563:Electrochemistry; D004566:Electrodes; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D005374:Filtration; D007854:Lead / Q000032:analysis*
D000393:Air Pollutants; D007854:Lead