scholarly journals Development of an In-Field Method for the Detection of Barium in Various Water Samples Using Differential Pulse Anodic Stripping Voltammetry

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
S. Ridgway ◽  
M. Wajrak
Keyword(s):  
Inductively Coupled Plasma ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Cost Effective ◽  
Differential Pulse ◽  
Field Method ◽  
Barium Concentration ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Anodic Stripping

This work presents a reliable, cost-effective, rapid and in-field voltammetric method for the detection of barium. The optimized method consists of an ultrathin mercury film deposited in situ on a glassy carbon electrode in dilute potassium chloride without deoxygenation, using differential pulse anodic stripping voltammetry (DP-ASV). Application of the method allowed for the quantitative determination of barium concentration in a variety of waters and brake pad dust samples. Comparative analysis of sample results from DP-ASV with inductively coupled plasma mass spectroscopy (ICP-MS) showed a mean percent difference of 1.8%.

scholarly journals Sorption Properties of Chitosan in the Refining of Rough Indium

2018 ◽  
Vol 20 (3) ◽  
pp. 235
Author(s):  
G.S. Beisenova ◽  
B.D. Burkitbayeva ◽  
A.M. Argimbaeva ◽  
G.S. Rakhymbay ◽  
F. Vacandio
Keyword(s):  
Inductively Coupled Plasma ◽  
Anodic Stripping Voltammetry ◽  
Optical Emission ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Sorption Properties ◽  
Inductively Coupled ◽  
Before And After ◽  
High Sorption ◽  
Cadmium Lead

The degree of purity of cathode deposits during the electrochemical refining of rough indium depends on the content of impurity metals in the electrolyte. In this work, an additional sorption purification of the refining electrolyte was carried out in order to reduce the content of such impurity metals as cadmium, lead, copper. Chitosan was used as a sorbent due to high sorption properties with respect to heavy metal ions. The determination of the concentration of the studied metals before and after the sorption was carried out by the method of differential pulse anodic stripping voltammetry (DPASV). The experimental results allowed to calculate the amount of metal sorbed by chitosan and the efficiency of its removal. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms and isotherm constants were determined. The Langmuir model agrees very well with experimental data. An inductively coupled plasma optical emission spectroscopy (ICP-OES) method was used to determine the presence of impurity metals and the degree of purity of electrorefined indium. The use of chitosan as a sorbent in the purification of rough indium allows to reduce the concentration of impurity metals in cathode deposits and to increase the content of the base metal to 99.9994%.

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