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RECORD NUMBER: 255 OF 846

OLS Field Name OLS Field Data
Main Title Determination of Background Levels of Lead and Cadmium in Raw Agricultural Crops by Using Differential Pulse Anodic Stripping Voltammetry.
Author Satzger, R. Duane ; Clow, Charles S. ; Bonnin, Evelyn ; Fricke, Fred L. ;
CORP Author Food and Drug Administration, Cincinnati, OH. Elemental Analysis Research Center.;Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1982
Report Number EPA-600/J-82-277;
Stock Number PB83-163436
Additional Subjects Lead(Metal) ; Cadmium ; Chemical analysis ; Farm crops ; Trace elements ; Concentration(Composition) ; Reprints ; Differential pulse anodic stripping voltametry
Holdings
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NTIS  PB83-163436 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 7p
Abstract
A method is described for the simultaneous determination of ultratrace levels of lead and cadmium in selected agricultural crop samples by differential pulse anodic stripping voltametry. Samples are dry ashed at high temperature with H2SO4 as an ashing aid. Techniques are described to control the lead and cadmium blank levels of 2 ng and 0.4 ng, respectively. Typical relative standard deviations for the crop analyses are 13% at 100 microgram/g and 25% at 10 microgram/g for lead, and 5% at 100 microgram/g and 10% at 10 microgram/g for cadmium. The lowest quantifiable level based on 3 g dry sample, is 2 microgram/g for lead and 1 microgram/g for cadmium. Recovery studies, precision studies, and analyses of NBS Standard Reference Materials demonstrate the accuracy and reproducibility of this technique. A summary of results for over 1700 crop samples is reported.