A note on the form of isotherms for anion adsorption ata polarised mercury electrode

The behaviour of electrochemically reducible single-strand polynucleotides (poly(adenylic acid)) and poly(cytidylic acid)) was studied by the differential (derivative) pulse polarography (DPP) and by other methods. Measurements were performed with the help of the dropping mercury electrode under various conditions specified by the pulse width, pulse amplitude, drop time etc. For the faradaic and tensammetric DPP peaks the diagnostic criteria were proposed which make it possible to classify even very small DPP peaks of double helical polynucleotides.

Download Full-text

Determination of platinum in biological material by differential pulse polarography: Analysis in urine, plasma and tissue following sample combustion

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19832903 ◽

1983 ◽

Vol 48 (10) ◽

pp. 2903-2908 ◽

Cited By ~ 16

Author(s):

Viktor Vrabec ◽

Oldřich Vrána ◽

Vladimír Kleinwächter

Keyword(s):

Biological Material ◽

Biological Fluid ◽

Mercury Electrode ◽

Differential Pulse ◽

Differential Pulse Polarography ◽

Linear Calibration ◽

Catalytic Current ◽

Pulse Polarography ◽

Dropping Mercury Electrode

A method is described for determining total platinum content in urine, blood plasma and tissues of patients or experimental animals receiving cis-dichlorodiamineplatinum(II). The method is based on drying and combustion of the biological material in a muffle furnace. The product of the combustion is dissolved successively in aqua regia, hydrochloric acid and ethylenediamine. The resulting platinum-ethylenediamine complex yields a catalytic current at a dropping mercury electrode allowing to determine platinum by differential pulse polarography. Platinum levels of c. 50-1 000 ng per ml of the biological fluid or per 0.5 g of a tissue can readily be analyzed with a linear calibration.

Download Full-text

The reduction of cobalt (II) ion in thiocyanate media by pulse polarography

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19830544 ◽

1983 ◽

Vol 48 (2) ◽

pp. 544-549 ◽

Cited By ~ 2

Author(s):

Jorge Alfredo Bolzan ◽

Robert Tokoro

Keyword(s):

Mercury Electrode ◽

Thiocyanate Complex ◽

Catalytic Wave ◽

Pulse Polarography ◽

Dropping Mercury Electrode ◽

Thiocyanate Concentration

The electroreduction of cobalt(II) in aqueous thiocyanate solutions at the dropping mercury electrode depends on the thiocyanate concentration. At [SCN-] = 0.3 mol/l the intermediate cobalt(I)-thiocyanate complex does exist electrokinetically and may be responsible for the appearance of a peaked catalytic wave. The predecessor species of this intermediate may be CoSCN+ and Co(SCN)2 in similarity to the behaviour of cobalt(II) with cyanide and azide ions.

Download Full-text