Real-time chemical sensing of aqueous ethanol glucose mixtures

Author

McKee, James M. ; Johnson, Bruce P.

Author_Institution

Broadcast Technol., Verdi, NV, USA

Volume

49

Issue

1

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

114

Lastpage

119

Abstract

A new high-frequency approach to monitoring component concentration in dielectric solutions is proposed. After appropriate calibration, the volume percentage of an n-component solution can be uniquely determined by measuring the real part of the solution permittivity at n-1 distinct frequencies. A flow-through microstrip bandpass filter sensor has been fabricated to demonstrate the accuracy of the technique when applied to a water-ethanol mixture. The sensor can discriminate 0.35% relative variations in ethanol volume concentration when solution temperature is independently monitored

Keywords

chemical sensors; chemical variables measurement; dielectric liquids; liquid mixtures; microstrip filters; microwave measurement; organic compounds; permittivity measurement; aqueous ethanol glucose mixtures; component concentration monitoring; dielectric solutions; flow-through microstrip bandpass filter sensor; glucose discriminator; high-frequency approach; multiple frequencies; permittivity measurement; real-time chemical sensing; volume percentage; water-ethanol mixture; Calibration; Chemicals; Dielectric measurements; Ethanol; Frequency measurement; Monitoring; Permittivity measurement; Sugar; Temperature sensors; Volume measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.836320

Filename

836320