Chemistry: electrical and wave energy – Processes and products
Patent
1985-09-09
1986-07-22
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204413, G01N 2748
Patent
active
046017925
ABSTRACT:
The invention relates to an improved and highly sensitive method of electroanalytical determination of electrochemically active compounds in solution. The invention comprises a pulsating mercury drop to obtain polarographic, voltametric (coulometric), potentiometric, and anodic stripping measurements, and other measurements derived therefrom. According to the invention, a pulsating mercury drop is extruded from a capillary tube into an electrochemical solution to be evaluated, and its electrolytic current or potential is measured against a reference electrode. The method provides that mercury is extruded from the capillary (and the size of the drop is increased) and then it is withdrawn back into the capillary (and the drop is decreased to its original size), so that the drop pulsates at a frequency of 0.1 to 100 cycles/second. In addition, the potential of the drop is varied continuously, or is changed by a jump from a value where oxidation or reduction of the measured electrochemical compound occurs, to a value where anodic dissolution results in deposition of the measured compound.
REFERENCES:
patent: 4260467 (1981-04-01), Smith et al.
R. Dias et al., J. Electroanal. Chem., 130, pp. 345-349, (1981).
Ceskoslovanka Akademie Ved
Kaplan G. L.
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