Backup Data Report No. 290 (Revised).
A method for the sampling and analysis of soluble and insoluble vanadium (7440622) in air was tested for NIOSH validation. The sample was collected on a 37 millimeter (mm) 0.8 micron Type AA Millipore cellulose ester filter. The filter was extracted with water and filtered through a 47mm 0.1 micron Type AA Millipore cellulose ester filter, made basic with potassium-hydroxide and analyzed for soluble vanadium by graphite furnace atomic absorption spectrophotometry. The 37mm and 47mm filter pair was acid digested and analyzed by graphite furnace AAS. The protocol for establishing NIOSH validation was to analyze spiked and dynamically generated samples for soluble and insoluble vanadium to represent 25 liter (L) or 400L air samples, test the breakthrough capacity of the cellulose ester filters, test the storage stability of 12 spiked filters and 18 generated filters containing both soluble and insoluble vanadium, and assess the precision and accuracy of the method. The aerosol generation and sampling system was presented. The total error for sampling and analysis was less than 25 percent at the NIOSH recommended standard 95 percent of the time for both soluble and insoluble vanadium. The authors conclude this method satisfies NIOSH criteria for validation.
Transition-metals; Analytical-methods; Air-sampling; Analytical-processes; Sampling-methods; Laboratory-techniques;
NTIS Accession No.
NIOSH, 22 pages, 5 references