A decomposition procedure for the determination of copper oxidation states in Cu-zeolites by XPS

2004 ◽  
Vol 36 (8) ◽  
pp. 756-759 ◽  
Author(s):  
L. Meda ◽  
G. F. Cerofolini
Keyword(s):  
Oxidation States ◽  
Copper Oxidation ◽  
Decomposition Procedure ◽  
Determination Of Copper

scholarly journals Anodic Stripping Voltammetric Determination Of Copper In Multivitamin-Mineral Formulations Using Iodine-Coated Platinum Electrode

2021 ◽  
Vol 16 (1) ◽  
pp. 48-56
Author(s):  
Mohammad Amayreh ◽  
Wafa Hourani ◽  
Mohammed Khair Hourani
Keyword(s):  
Platinum Electrode ◽  
Limit Of Detection ◽  
Statistical Tests ◽  
Supporting Electrolyte ◽  
Copper Oxidation ◽  
Copper Determination ◽  
Limit Of Quantitation ◽  
Significant Difference ◽  
Determination Of Copper

In this work, the utilization of the modified iodine-coated polycrystalline platinum electrode as a voltammetric sensor for copper determination in pharmaceutical formulations was reported. The optimized experimental parameters for the determination of copper were using 0.1M KCl as a supporting electrolyte with a scan rate of 50 mV/s, deposition potential of - 0.2 V, and a deposition time of 2 minutes. The anodic peak related to Copper oxidation is centered at about + 0.05 V. The extended detected linear range for the developed method was between 1 ppm and 100 ppm. The anodic current showed excellent linearity with R2 = 0.9986. The limit of detection (LOD) and limit of quantitation (LOQ) were 0.115 ppm and 0.346 ppm, respectively, which attests to the sensitivity of the method. The investigation for the effect of potential interferences from multivitamins tablet ingredients indicated a specific selectivity toward copper and the absence of any electrochemical response toward these components. The developed method was successfully applied to analyze copper and the obtained results were in good agreement with the labeled values, besides that, the statistical tests indicated no significant difference at p = 0.05 with 95 % confidence level.

Photometric determination of copper (II) microquantities in pyrite

2019 ◽  
Vol 85 (10) ◽  
pp. 23-28
Author(s):  
F. S. Aliyeva ◽  
F. O. Mamedova ◽  
F. N. Bahmanova ◽  
Yu. A. Yusibov ◽  
F. M. Chyragov
Keyword(s):  
Photometric Determination ◽  
Determination Of Copper

DETERMINATION OF COPPER, NICKEL AND CHROMIUM CONTENTS IN CULTIVATED TEA IN NORTH OF IRAN

2015 ◽  
Vol 14 (10) ◽  
pp. 2409-2413
Author(s):  
Amir Hossein Mahvi ◽  
Azita Mohagheghian ◽  
Sakineh Shekoohiyan ◽  
Ali Koolivand ◽  
Shahrokh Nazmara ◽  
...  
Keyword(s):  
Copper Nickel ◽  
North Of Iran ◽  
Determination Of Copper
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