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Monitoring acid-base, precipitation, complexation and redox titrations by a capacitively coupled contactless conductivity detector
journal contribution
posted on 2018-02-01, 00:00 authored by X Zhang, M Huang, J Zhao, J Liu, Wenrong YangWenrong Yang, K QuHerein, an approach for versatile titration by monitoring the chemical reaction process with a developed capacitively coupled contactless conductivity detector (C 4 D) was developed. A disposable glass reaction cell, in which sub-milliliter titrand was loaded, was inserted into the working head stage of the C 4 D. Upon addition of titrant, the ionic strength and/or mobility of components in the solution changed, causing consequently chang e of conductivity. The C 4 D monitored the change in real time. A V-shaped titration curve was gained, allowing an easy identification of the endpoint. Between the elapsed time and the initial concentration of titrand, linear relationships were found for classical acid-base, precipitation, complexation and redox reaction over certain ranges, enabling the establishment of quantitative determinations. The new approach had a few charming advantages (e.g. simplicity and cost effectiveness) over contact electrochemical methods because that the solution was isolated from the working electrodes. Therefore, a development of versatile and multifunctional platform for micro-titrations is promising.
History
Journal
MeasurementVolume
116Pagination
458 - 463Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0263-2241Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2017, Elsevier Ltd.Usage metrics
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Keywords
Micro-titrationCapacitively coupled contactless conductivity detectorEndpoint detectionMultifunctional platformSimple titrationScience & TechnologyTechnologyEngineering, MultidisciplinaryInstruments & InstrumentationEngineeringCAPILLARY-ELECTROPHORESISCIPROFLOXACINMICROCHIPDEVICESNITRATESYSTEMMechanical EngineeringArtificial Intelligence and Image Processing
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