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dc.contributor.authorTinakorn Kanyaneeen_US
dc.contributor.authorPongwasin Fuekhaden_US
dc.contributor.authorKate Grudpanen_US
dc.description.abstractMiniaturized coulometric titration in a liquid drop has been investigated. Assays of ascorbic acid and thiosulfate with iodine titration were chosen as models. Constant volumes of falling liquid drops containing sample or reagent are manipulated via gravimetrical force to move along a slope hydrophobic path and directed to stop or to move out from an electrode. Such manipulation is useful for delivery of sample and reagents, in a way of flow without tubing. Electrochemical generation of titrant, in this case, iodine, is started at the electrode and micro coulometric titration can be performed in a drop by applying constant current. Timing in the titration can be made via naked eye with a stopwatch or via recording with a webcam camera connecting to a computer to detect the change due to the blue color complex of the excess iodine and starch. © 2013 Elsevier B.V.en_US
dc.titleMicro coulometric titration in a liquid dropen_US
article.volume115en_US Mai Universityen_US
Appears in Collections:CMUL: Journal Articles

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