Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For ion concentration
Reexamination Certificate
2005-04-05
2005-04-05
Noguerola, Alex (Department: 1753)
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For ion concentration
C204S416000, C205S775000
Reexamination Certificate
active
06875337
ABSTRACT:
The present invention concerns a method for improving the sensitivity in measurements when performing electrochemical analysis containing low metal concentrations and a means for performing electrochemical analysis. Ordinary stirring has to be avoided during the voltammetric scanning due to the low reproducibility when stirring takes place. A sound exposure, however, can be performed during the entire measurement, increasing the sensitivity. Further it is concluded that sound exposure close to the resonant frequency, has improvement effects at least comparable to stirring, and thus all mechanical stirring can be avoided. It is found that audible sound in the low frequency range, around 100 Hz is very effective for this purpose, with an increase of the analytical signal up to about 300%, without any significant increase in the corresponding noise level.
REFERENCES:
patent: 4201646 (1980-05-01), Matson
patent: 5384029 (1995-01-01), Campbell
patent: 1249429 (1986-08-01), None
Bratten et al. (“Micromachining sensors for Electrochemical Measurement in Subnanoliter Volumes,” Anal. Chem. 1997, 69, 253-258).
Mikkelsen Öyvind
Schrøder Knut H.
Noguerola Alex
Wenderoth , Lind & Ponack, L.L.P.
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