Record Display for the EPA National Library Catalog


Main Title Standard Operating Procedure for the Field Analysis of Lead in Dust Collected by Vacuum and on Wipes by Ultrasonic, Acid Digestion, and Colorimetric Measurement.
Author Grohse, P. M. ; Van Hise, C. C. ; Wilson, B. M. ; Luk, K. K. ; Binstock, D. A. ;
CORP Author Research Triangle Inst., Research Triangle Park, NC. Center for Environmental Measurements and Quality Assurance.;Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab.
Publisher Jan 98
Year Published 1998
Report Number EPA-68-D1-0009 ;EPA-68-D5-0040; EPA/600/R-95/151;
Stock Number PB98-140734
Additional Subjects Lead(Metal) ; Chemical analysis ; Colorimetry ; Digestion(Decomposition) ; Ultrasonic testing ; Lead compounds ; Sampling ; Collecting methods ; Dust ; Sample preparation ; Vacuum systems ; Acids ; Colorimetric analysis ; Detection ; Calibration ; Quality control ; Field tests ; Standard operating procedures ; Wiping
Library Call Number Additional Info Location Last
NTIS  PB98-140734 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 56p
Dust samples that have been collected on dust wipes or captured via vacuum techniques are placed in 120 mL plastic specimen cups or teflon microwave digestion vessels. Fifteen (15) mL of 25% (v/v) nitric acid is added to each sample cup and after a brief manual agitation the samples are ultrasonicated for 30 minutes. Deionized water is added to a total of 50 mL. After another brief manual shaking, the sample is either filtered, centrifuted or allowed to settle for 15 minutes. A portion of extract is then adjusted to a pH between 3 and 4 with a sodium hydroxide/sodium acetate reagent prior to Pb measurement by colorimetry. A portable colorimeter is calibrated and samples are analyzed. Quality control samples include blanks, spikes and secondary or primary reference materials. An additional quality control activity includes checking for matrix effects. The typical minimum detection limit for Pb in dust on collection media is estimated to be 6 micrograms.