Determination of lead and cadmium in seawater by differential pulse anodic stripping voltammetry: fit-for-purpose partial validation and internal quality aspects

2008 ◽  
Vol 392 (1-2) ◽  
pp. 277-286 ◽  
Author(s):  
K. Bisetty ◽  
N. J. Gumede ◽  
L. Escuder-Gilabert ◽  
S. Sagrado
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Internal Quality ◽  
Lead And Cadmium ◽  
Quality Aspects ◽  
Anodic Stripping ◽  
Fit For Purpose

Determination of Background Levels of Lead and Cadmium in Raw Agricultural Crops by Using Differential Pulse Anodic Stripping Voltammetry

1982 ◽  
Vol 65 (4) ◽  
pp. 987-991 ◽  
Author(s):  
R Duane Satzger ◽  
Charles S Clow ◽  
Evelyn Bonnin ◽  
Fred L Fricke
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Standard Reference Materials ◽  
Agricultural Crop ◽  
Lead And Cadmium ◽  
Relative Standard ◽  
Anodic Stripping ◽  
Quantifiable Level

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 voltammetry. 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 ng/g and 25% at 10 ng/g for lead, and 5% at 100 ng/g and 10% at 10 ng/g for cadmium. The lowest quantifiable level, based on 3 g dry sample, is 2 ng/g for lead and 1 ng/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.

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