Open AccessHydrodynamic Electrochemistry in 20 μL Drops in the Rotating Sample System
Author(s) -
Gautam N. Shetty,
Nilofar Syed,
Koji Tohda,
Miklós Gratzl
Publication year - 2005
Publication title -
analytical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 73
eISSN - 1348-2246
pISSN - 0910-6340
DOI - 10.2116/analsci.21.1155
Subject(s) - chemistry , electrode , drop (telecommunication) , convection , rotation (mathematics) , analytical chemistry (journal) , substrate (aquarium) , mechanics , chromatography , mechanical engineering , physics , geometry , mathematics , oceanography , engineering , geology
The Rotating Sample System (RSS) has been conceived in the authors' laboratory as a convection platform for microliter-sized solution volumes. Convection is achieved by rotating a small drop of sample on a stationary substrate by humidified gas jets directed tangentially at the drop base with the working electrode and a liquid junction embedded in it. Simplicity and portability of the device, and substrates complete with microfabricated electrode and junction made potentially disposable, are further competitive advantages with respect to competing, conventional analytical systems. In this work the RSS' performance with variation of system parameters such as the position and size of gas jets used for sample rotation, and position of the working electrode in the substrate are studied. Trace levels of Pb could be detected with this system and is reported here.