Polarographic behaviour of some new N1-isonicotinoyl-N2-disubstituted hydrazines and determination their structure

1971 ◽  
Vol 36 (2) ◽  
pp. 404-413 ◽  
Author(s):  
D. Dumanović ◽  
M. Miloradović ◽  
Dj. Kosanović
Keyword(s):  
Polarographic Behaviour

Polarographic Determination of 6-β-D-Glucopyranosyloxy-7-hydroxycoumarin

1996 ◽  
Vol 61 (3) ◽  
pp. 333-341
Author(s):  
Jiří Barek ◽  
Roman Hrnčíř ◽  
Josino C. Moreira ◽  
Jiří Zima
Keyword(s):  
Natural Compound ◽  
Mercury Electrode ◽  
Direct Determination ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Whitening Agent ◽  
Polarographic Behaviour ◽  
Pulse Polarography ◽  
Dropping Mercury Electrode

The polarographic behaviour was studied for 6-β-D-glucopyranosyloxy-7-hydroxycoumarin, a natural compound serving as an optical whitening agent. The substance can be quantitated by tast polarography, differential pulse polarography using a conventional dropping mercury electrode, and differential pulse polarography using a static mercury drop electrode over the regions of 20-1 000, 2-1 000, and 0.2-1 000 μmol l-1, respectively. The methods developed for the quantitation of the compound were applied to its direct determination in a raw product.

Polarographic behaviour and determination of nitrofurantoin, chloramphenicol and related compounds

The Analyst ◽  
1984 ◽  
Vol 109 (5) ◽  
pp. 633 ◽  
Author(s):  
Alfonso Morales ◽  
Maria I. Toral ◽  
Pablo Richter
Keyword(s):  
Polarographic Behaviour ◽  
Related Compounds

Polarographic behaviour of zinc in acetate buffer

1962 ◽  
Vol 50 (6) ◽  
pp. 1032-1034 ◽  
Author(s):  
O. P. Agrawal ◽  
R. C. Kapoor
Keyword(s):  
Acetate Buffer ◽  
Polarographic Behaviour

Polarographic Behaviour of Some Arylazotheophyllines

1993 ◽  
Vol 58 (9) ◽  
pp. 1978-1988
Author(s):  
Mohamed I. Ismail ◽  
Madlene L. Iskander
Keyword(s):  
Diffusion Coefficient ◽  
Model Compound ◽  
Aqueous Media ◽  
Chemical Characteristics ◽  
Polarographic Behaviour ◽  
Physico Chemical ◽  
Controlled Potential Electrolysis ◽  
Azo Group ◽  
Controlled Potential ◽  
Electrolysis Products

The polarographic behaviour of a series of arylazotheophyllines was studied in aqueous alcoholic buffer media and in DMF-0.1 M LiClO4 solution. The redox study gave evidence that the azo group is electroactive in aqueous as well as non-aqueous media. A mechanism interpreting the electrode process is proposed and confirmed through the identification of the controlled potential electrolysis products, the use of a model compound and the application of Hamett's σ-E relationship. The physico-chemical characteristics of these compounds, viz. the diffusion coefficient, dissociation constant, ionization potential and electron affinity, are also included.

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