Evaluation and optimization of the standard addition method for absorption spectrometry and anodic stripping voltammetry

1978 ◽  
Vol 50 (9) ◽  
pp. 1374-1380 ◽  
Author(s):  
J. P. Franke ◽  
R. A. De Zeeuw ◽  
R. Hakkert
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Absorption Spectrometry ◽  
Standard Addition Method ◽  
Addition Method ◽  
Anodic Stripping

scholarly journals Direct Determination of Zn, Cd, Pb and Cu in Wine by Differential Pulse Anodic Stripping Voltammetry

Beverages ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 6 ◽  
Author(s):  
Juliana Maciel ◽  
Michele Souza ◽  
Lisiane Silva ◽  
Daiane Dias
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Direct Determination ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Anthropogenic Sources ◽  
Organic Substances ◽  
Addition Method ◽  
Anodic Stripping

Metals in wine can originate from natural and anthropogenic sources and their concentrations have significant effects on wine proprieties as well in its conservation. In this work, direct and simultaneous determinations of Zn, Cd, Pb and Cu in wine samples were carried out by differential pulse anodic stripping voltammetry without any steps of previous pretreatment. The samples analyzed presented concentration levels from 4.64 to 69.3 µg L−1 of Zn, from 1.74 to 5.25 µg L−1 of Cd, from 4.57 to 17.9 µg L−1 of Pb and from 1.0 to 10.3 µg L−1 of Cu. Accuracy was evaluated with the standard addition method and recoveries ranged from 82.5 and 130.8% for Zn, from 85.7 to 107.0% for Cd, from 89.7 to 101.0% for Pb and from 81.4 to 105.9% for Cu. With the application of this method, it was possible to quantify the metals in a simple and easy way not requiring sample preparation or other approaches for the destruction of organic substances.

scholarly journals Simultaneous determination of trace levels of Cd(II) and Pb(II) in tap water samples by anodic stripping voltammetry with 2-mercaptobenzothiazole modified electrode

2019 ◽  
Vol 9 (4) ◽  
pp. 231-242 ◽  
Author(s):  
Sophy Phlay ◽  
Weena Aemaeg Tapachai ◽  
Supunnee Daungthong ◽  
Puchong Worarattananurak ◽  
Pipat Chooto
Keyword(s):  
Mesoporous Silica ◽  
Modified Electrode ◽  
Tap Water ◽  
Anodic Stripping Voltammetry ◽  
Optical Emission ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Emission Spectrometry ◽  
In Situ Preparation ◽  
Anodic Stripping

Glassy carbon electrode (GCE) modified by 2-mercaptobenzothiazole (MBT), mesoporous silica (Meso) and bismuth was developed to determine Cd(II) and Pb(II) simultaneously by square wave anodic stripping voltammetry (SWASV). In-situ preparation was found to work best in optimum conditions of acetate buffer pH 6, accumulation potential of -1.1 V, deposition time of 300 s and scan rate of 200 mV/s. SW peaks revealed the linear range of 5-50 µg/L Cd(II) and 5-50 µg/L Pb(II). LOD and LOQ for Cd(II) and Pb(II) were determined as 0.56, 0.80, 1.87 and 2.66 µg/L, respectively. The interaction of metals with bismuth and MBT, as well as higher surface area due to mesoporous silica, support beneficial performance of the modified electrode. Insignificant interferences from other regularly present metal ions were found. With SRM1640 standard, the SWASV results are found comparable to those obtained by inductive coupled plasma optical emission spectrometry (ICP-OES). The method was used to analyze the metals in tap water by standard addition method with the satisfactory recovery of 100.7 % for Cd(II) and 100.8 % for Pb(II).

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