NDLI: A simple ion concentration measurement system using a microfluidic device with ISFET sensors

Content Provider	IEEE Xplore Digital Library
Author	Miura, T. Yamada, A.
Copyright Year	2014
Description	Author affiliation: Dept. of Mech. Eng., Aichi Inst. of Technol., Toyota, Japan (Miura, T.; Yamada, A.)
Abstract	We present a newly developed measurement system using a microfluidic device designed to measure hydrogen ion concentrations (pH) in a relatively simple procedure that consumes only small amounts of sample solution. The device takes the form of a channel consisting of two inlets and one outlet connected together with a Y-shaped junction. Two ion-sensitive field-effect transistors (ISFETs) and an Ag/AgCl pseudo reference electrode are fitted into the device as a differential measurement circuit. The small size and high sensitivity of the ISFET sensors enable the measurement of small volumes of sample solution within a short time. The design principle and operation of the measurement system are very simple: a baseline solution (BLS) and sample solution are supplied into the device by a gravity-driven pump and the inflows of solutions are switched by adjusting the respective heights of the solution reservoirs. The measurement accuracy of a trial device was evaluated using standard solutions and diluted solutions after calibration. The maximum measurement errors for the standard solutions and 100-fold diluted solutions were 0.04 pH and 0.16 pH, respectively.
Starting Page	1
Ending Page	4
File Size	266778
Page Count	4
File Format	PDF
e-ISBN	9781479966790
DOI	10.1109/MHS.2014.7006164
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-11-10
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microfluidics Sea measurements Sensor systems Electrodes Measurement errors pH measurement
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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