Simultaneous determination of cadmium and lead in whole blood and in serum by computerized potentiometric stripping analysis

1981 ◽  
Vol 53 (9) ◽  
pp. 1406-1410 ◽  
Author(s):  
Daniel. Jagner ◽  
Mats. Josefson ◽  
Stig. Westerlund ◽  
Kerstin. Aaren
Keyword(s):  
Simultaneous Determination ◽  
Whole Blood ◽  
Stripping Analysis ◽  
Potentiometric Stripping Analysis ◽  
Cadmium And Lead

Direct Determination of Cadmium and Lead in Whole Blood by Potentiometric Stripping Analysis

1992 ◽  
Vol 38 (10) ◽  
pp. 1995-2001 ◽  
Author(s):  
P Ostapczuk
Keyword(s):  
Detection Limit ◽  
Blood Sample ◽  
Whole Blood ◽  
Deposition Time ◽  
Supporting Electrolyte ◽  
Direct Determination ◽  
Stripping Analysis ◽  
Lead And Cadmium ◽  
Potentiometric Stripping Analysis

Abstract The commercially available equipment for potentiometric stripping analysis (PSA) was tested for routine lead and cadmium determination in whole-blood samples. In contrast to anodic stripping voltammetry, PSA is not subject to background interferences from organic electroactive constituents in the sample or to the presence of dissolved oxygen (i.e., oxygen removal is not necessary). To determine lead and cadmium by PSA, it is sufficient to dilute the blood sample with an appropriate supporting electrolyte (0.5 mol/L HCl). The detection limit changes with deposition time and volume of blood sample used. For 1 mL of blood and a 1-min deposition time, the detection limit is 1 microgram/L for both elements. If the deposition time increases to 10 min, cadmium can be determined at its normal concentration in blood (the detection limit is improved to < 0.1 microgram/L). Procedures for routine determination of lead and cadmium in whole blood are presented.

scholarly journals Potentiometric Stripping Analysis of Cadmium and Lead with Constant Inverse Current in the Analytical Step Using an Open Tubular Mercury-Coated Glassy Carbon Electrode

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Zvonimir J. Suturović ◽  
Snežana Ž. Kravić ◽  
Zorica S. Stojanović ◽  
Ana D. Đurović ◽  
Tanja Ž. Brezo-Borjan
Keyword(s):  
Glassy Carbon ◽  
Milk Powder ◽  
Rest Period ◽  
Modified Technique ◽  
Stripping Analysis ◽  
Relative Standard ◽  
Potentiometric Stripping Analysis ◽  
Cadmium And Lead ◽  
Method Accuracy

The most important experimental parameters of the flow potentiometric stripping analysis (PSA) with oxygen as an oxidant were investigated and optimised. A simple, homemade flow system consisting of glassy carbon tubes, which served as a working and auxiliary electrode, was used. By applying a rest period before the stripping step (the flow stop mode) and by imposing a constant reductive current simultaneously with the interruption of potentiostatic control, significant increase of the flow PSA sensitivity was achieved. In the determination of cadmium and lead, quantitation limits of 0.11 and 0.82 μg/L were obtained. The precision of the method was evaluated in terms of repeatability and reproducibility, with values of relative standard deviation lower than 4.0% for cadmium and 4.2% for lead. This modified technique was applied for simultaneous determination of cadmium and lead in milk, after a simple pretreatment of the samples by dilution and acidification. The method accuracy was confirmed by analysing the certified reference material of skimmed milk powder (ERM-BD151).

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