Determination of zinc, copper, lead and cadmium in some medicinally important leaves by differential pulse anodic stripping analysis

2003 ◽  
Vol 17 (2) ◽  
pp. 79-83 ◽  
Author(s):  
Nimmagadda Venkata Vijaya Jyothi ◽  
Pavuluri Chandra Mouli ◽  
Srinivasula Reddy Jayarama Reddy
Keyword(s):  
Differential Pulse ◽  
Stripping Analysis ◽  
Lead And Cadmium ◽  
Anodic Stripping ◽  
Copper Lead

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.

Voltammetric determination of trace amounts of aluminium

1989 ◽  
Vol 54 (2) ◽  
pp. 370-374 ◽  
Author(s):  
Věra Stará ◽  
Miloslav Kopanica
Keyword(s):  
Linear Dependence ◽  
Differential Pulse ◽  
Hanging Mercury Drop Electrode ◽  
Pulse Technique ◽  
Aluminium Concentration ◽  
Lead And Cadmium ◽  
Effect Of Copper ◽  
Alizarin Violet ◽  
Copper Lead

Aluminium is determined voltammetrically in the form of the aluminium complex with Acid Alizarin Violet N in an acetate buffer of pH 5.2 using a hanging mercury drop electrode and the d.c. or differential pulse technique. A linear dependence between the peak current and the aluminium concentration was obtained in the range from 2.10-8 to 5.10-6 mol l-1. The interfering effect of copper, lead and cadmium is eliminated by the auxiliary complex forming reagent-glycine.

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