Preanodized Screen Printed Carbon Electrode for Detection of Linalool using Three Terminal Network

Abhishruti Bhuyan,Rajib Bandyopadhyay,Bipan Tudu,Amarprit Singh,Sudarshan Gogoi

doi:10.35940/ijeat.b3529.129219

Abhishruti Bhuyan, Rajib Bandyopadhyay + Show 3 more

Open Access

https://doi.org/10.35940/ijeat.b3529.129219

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Abstract

Linalool is a very important flavouring compound found in plants which is used in food and beverages. Linalool has been traditionally detected by analytical instruments such as gas chromatography (GC) coupled with mass spectroscopy(MS) which are not suitable for routine tests. For fast and low cost detection of chemical compounds electrochemial sensors are most suitable. Screen printed carbon electrode (SPCE) is one of the most popular and low cost device used for detection of chemical compounds. In this article we present the detection of linalool using a low cost preannodized commercial screen printed carbon electrode (SPCE). Traditionally electrochemical sensors are used in two terminal mode, however three terminal analysis of electrochemical sensors are found to be more rationale and accurate. In this paper we have analyzed detection of linalool by an advanced three terminal analysis. First we have performed cyclic voltammetry(CV) of the SPCE which showed clear oxidation peaks at different concentration of linalool. The input-output data of the CV has been used for analysis of the impedance of the SPCE.The impedance model of the SPCE was estimated by autoregressive moving average with exogenous inputs(ARMAX) modelling technique using the CV data. The three terminal impedance fitting revealed the values of electrical parameters and the parasitic elements at different linalool concentration. The stability limits of the SPCE was also determined from the pole-zero and Nyquist plots of the estimated models. Impedance behaviour to frequency of the SPCE was further analyzed by impedance plot( 𝒁 vs −𝒁 ′ ) from which we are able to relate the CV scan rate to the impedance of the SPCE. Finally the sensitivity and repeatability of the SPCE was determined using a measurement circuit.

Highlights

Detection and characterization of linallol are done by high performance liquid chromatography(HPLC),gas chromatography(GC) coupled to mass spectrometry or Revised Manuscript Received on December 08, 2019 * Correspondence Author
A variety of electrodes have been developed for electrochemical sensors using noble metals, carbon materials in Screen printed carbon electrodes (SPCE) deposited on rigid substrates to flexible materials like paper, fabric, wearable cloth etc have drawn attention
Motivated by the promising results on analysis of the performance of the five electrodes, in this paper we propose that ARMAX model can be estimated from the input and output cyclic voltammetry(CV) data of the SPCE

Summary

Introduction

Engineering, Tezpur University,Tezpur-784028, India flame ionization detectors(FID) with different sample pretreatments[2,3,4,5,6,7,8]. These methods involve high cost method[6];instrumentation and they are not applicable in routine analysis. GC−Olfactometry in white Austrian clover flowers[3]; quantitative analysis of linalool in wine[4]; determination of myristicin and linalool in plants exposed to microwave radiation byHPLC[5]; assay of linalool in coriander oil by proton NMR characterization and adulteration monitoring of linalool by Electrospray Ionization Mass. A variety of electrodes have been developed for electrochemical sensors using noble metals, carbon materials in Screen printed carbon electrodes (SPCE) deposited on rigid substrates to flexible materials like paper, fabric, wearable cloth etc have drawn attention

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