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Automatic mercury drop electrode with double solenoid activated valve
Author(s) -
Pedrotti Jairo,
Angnes Lucio,
Gutz Ivano G. R.
Publication year - 1992
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140040606
Subject(s) - electrode , dropping mercury electrode , materials science , reproducibility , mercury (programming language) , drop (telecommunication) , computer science , chemistry , electrical engineering , engineering , chromatography , electrochemistry , programming language
The construction and evaluation of a simple, low cost, and versatile automatic mercury electrode, working as dropping (DME), hanging (HMDE), or static drop electrode (SMDE), is described. Fast action of the needle valve is obtained with two solenoids, one for opening the valve and the other for closing it. The electrode can be controlled from a microcomputer or with a digital circuit. The performance of this electrode compares favorably with that of commercial ones in terms of area reproducibility (std. dev. < 0.05%), response time of the valve, current profile during potentiostatic extrusion of the drop, and flexibility of use.