Hierarchically assembled mesoporous ZnO nanorods for the removal of lead and cadmium by using differential pulse anodic stripping voltammetric method

2013 ◽  
Vol 239 ◽  
pp. 208-216 ◽  
Author(s):  
K. Yogesh Kumar ◽  
H.B. Muralidhara ◽  
Y. Arthoba Nayaka ◽  
J. Balasubramanyam ◽  
H. Hanumanthappa
Keyword(s):  
Zno Nanorods ◽  
Differential Pulse ◽  
Voltammetric Method ◽  
Lead And Cadmium ◽  
Anodic Stripping ◽  
Mesoporous Zno

Interference by Tin in AOAC Dry-Ash Voltammetric Method for Determination of Lead and Cadmium in Canned Foods

1988 ◽  
Vol 71 (4) ◽  
pp. 857-859
Author(s):  
Walter Holak ◽  
John J Specchio
Keyword(s):  
Tartaric Acid ◽  
False Positive ◽  
Supporting Electrolyte ◽  
Canned Food ◽  
Voltammetric Method ◽  
Lead And Cadmium ◽  
Anodic Stripping ◽  
Canned Foods ◽  
Positive Results

Abstract When lead and cadmium were determined in samples of canned food by the AOAC anodic stripping voltammetric method, an interference was observed which was believed to be tin(IV). This interference could cause false positive results for lead and cadmium. The electroactivity of tin(IV) was suppressed by increasing the concentration of tartaric acid in the supporting electrolyte from 0.005M to 0.1M after mixing with an equal volume of sample solution.

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.

Internal standards in differential pulse anodic stripping voltammetry

1991 ◽  
Vol 69 (4) ◽  
pp. 755-758 ◽  
Author(s):  
Angelo Ransirimal Fernando ◽  
Byron Kratochvil
Keyword(s):  
Calibration Curve ◽  
Anodic Stripping Voltammetry ◽  
Internal Standard ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Internal Standards ◽  
Lead And Cadmium ◽  
Surface Active Agents ◽  
Anodic Stripping

The use of lead and cadmium as internal standards for each other in anodic stripping analysis was investigated. Although accuracy was not affected, precision was significantly improved. The surface active agents Triton-X 100 and starch affected the sensitivity of the anodic stripping procedure for lead and cadmium, leading to error if a calibration curve is used. Data for application of the procedure to the analysis of the marine biological reference material LUTS-1 and soil reference materials SO-2, SO-3, and SO-4 are provided. Key words: internal standard, anodic stripping voltammetry, calibration curve, standard addition, lead determination, cadmium determination.

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