Acid decomposition of omeprazole in the absence of thiol: A differential pulse polarographic study at the static mercury drop electrode (SMDE)

2006 ◽  
Vol 95 (2) ◽  
pp. 384-391 ◽  
Author(s):  
Ali M. Qaisi ◽  
Maha F. Tutunji ◽  
Lara F. Tutunji
Keyword(s):  
Differential Pulse ◽  
Polarographic Study ◽  
Acid Decomposition ◽  
Mercury Drop Electrode

The voltammetric determination of 4-nitrobiphenyl

1991 ◽  
Vol 56 (3) ◽  
pp. 595-601 ◽  
Author(s):  
Jiří Barek ◽  
Gulamustafa Malik ◽  
Jiří Zima
Keyword(s):  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Hanging Mercury Drop Electrode ◽  
Optimum Conditions ◽  
Mercury Drop Electrode ◽  
Working Electrode ◽  
Pulse Voltammetry ◽  
Unstirred Solution

Optimum conditions were found for the determination of 4-nitrobiphenyl by fast scan differential pulse voltammetry at a hanging mercury drop electrode in the concentration range 1 . 10-5 to 2 . 10-7 mol l-1. A further increase in sensitivity was attained by adsorptive accumulation of this substance on the surface of the working electrode, permitting determination in the concentration range (2 – 10) . 10-8 mol l-1 with one minute accumulation of the substance in unstirred solution or (2 – 10) . 10-9 mol l-1 with three-minute accumulation in stirred solution. Linear scan voltammetry can be used to determine 4-nitrobiphenyl in the concentration range (2 – 10) . 10-9 mol l-1 with five-minute accumulation in stirred solution, with the advantage of a smoother baseline and smaller interference from substances that yield only tensametric peaks.

A potentiometric and differential pulse polarographic study of CdII with 1-hydroxyethylenediphosphonic acid

1999 ◽  
Vol 379 (1-2) ◽  
pp. 217-226 ◽  
Author(s):  
Ignacy Cukrowski ◽  
Jan Rijn Zeevaart ◽  
Neil V. Jarvis
Keyword(s):  
Differential Pulse ◽  
Polarographic Study

Polarographic and Voltammetric Determination of N,N-Dimethyl-4-amino-4'-sulfoazobenzene

1997 ◽  
Vol 62 (4) ◽  
pp. 597-608 ◽  
Author(s):  
Jiří Barek ◽  
Pham Tuan Hai ◽  
Viktor Mejstřík ◽  
Josino C. Moreira ◽  
Jiří Zima
Keyword(s):  
Mercury Electrode ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Test Substance ◽  
Hanging Mercury Drop Electrode ◽  
Large Area ◽  
Mercury Drop Electrode ◽  
Pulse Polarography ◽  
Dropping Mercury Electrode ◽  
Constant Potential

The polarographic behaviour of N,N-dimethyl-4-amino-4'-sulfoazobenzene was investigated by tast polarography and differential pulse polarography at a dropping mercury electrode, constant-potential coulometry at a large area mercury electrode and cyclic voltammetry at a hanging mercury drop electrode. Optimum conditions have been found for its determination by tast polarography in the concentration range of 2-100 μmol l-1, differential pulse polarography at a dropping mercury electrode in the concentration range of 0.2-100 μmol l-1 and by differential pulse voltammetry at a hanging mercury drop electrode in the concentration range of 0.02-10 μmol l-1. The sensitivity of the determination can be further improved by adsorptive accumulation of the test substance on the hanging mercury drop electrode. Three-minute accumulation in stirred solution allows determination in the range of 0.2-100 nmol l-1.

Photo-oxidation of tetracycline—a differential pulse polarographic study

1983 ◽  
Vol 14 (2-3) ◽  
pp. 133-142 ◽  
Author(s):  
Douglas E. Moore ◽  
Maria P. Fallon ◽  
Christopher D. Burt
Keyword(s):  
Differential Pulse ◽  
Polarographic Study ◽  
Photo Oxidation
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