title: Capacitance-to-digital: the upgrades of single chip detector.
abstract: The capacitance-to-digital single chip detector was upgraded. The paper discusses hardware issues and benefits of the designed/upgraded detector. The device can be operated from rechargeable lithium-ion battery as stand-alone, portable system and is capable of transmitting real-time data wirelessly. The detector and additional modules (battery, battery holder, microcontroller board, wireless module) weight is less than 85 g. Electrophoretic separation in low conductivity 20 mM MES/L-His buffer, pH 6.1, was performed in order to evaluate detection parameters. The system is capable of quantification of potassium ions down to 0.31 μM. Investigation of differential signal acquisition configuration showed improved performance regarding external noise and temperature fluctuations. The system can be a solution for stand-alone, field-portable capillary format separation detector.
authors.affiliation: Faculty of Natural Sciences, Department of Biology, Vytautas Magnus University, Kaunas, Lithuania.
authors.forename: Tomas
authors.initials: T
authors.lastname: Drevinskas
authors.forename: Audrius
authors.initials: A
authors.lastname: Maruška
authors.forename: Vitalis
authors.initials: V
authors.lastname: Briedis
mesh_terms: D001514:Bee Venoms / Q000032:analysis; D002138:Calibration; D011211:Electric Power Supplies; D019075:Electrophoresis, Capillary / Q000295:instrumentation* / Q000379:methods; D046209:Electrophoresis, Microchip / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D007477:Ions; D008094:Lithium; D008904:Miniaturization / Q000295:instrumentation; D011188:Potassium / Q000032:analysis
chemical_list: D001514:Bee Venoms; D007477:Ions; D008094:Lithium; D011188:Potassium
keywords: Capacitance-to-digital converter; Capillary electrophoresis; Miniaturization