Impedimetric Approach for Estimating the Presence of Metanil Yellow in Turmeric Powder from Tunable Capacitance Measurement

Das, Chirantan; Chakraborty, Sucharita; Bera, Nirmal Kumar; Acharya, Krishnendu; Chattopadhyay, Dipankar; Karmakar, Anupam; Chattopadhyay, Sanatan

doi:10.1007/s12161-018-01423-1

Cited by 16 publications

(13 citation statements)

References 38 publications

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“…The sensitivity of the employed analytical method has been calculated in terms of current values obtained from voltammetric measurements. The calibration curve's slope, as shown below, determines the change in current for a tiny change in glucose concentration, hence the sensitivity of the analytical method is described in terms of current [ 44,45 ]

$$\gamma = \frac{\sum \left(\right. \alpha - \langle \alpha \rangle \left.\right) \left(\right.

…”

Section: Resultsmentioning

confidence: 99%

3D Printed Design‐Assisted Multilayered Graphene Oxide‐Modified Polymer Glucose Sensor

Das,

Chugh

et al. 2023

Adv Eng Mater

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This work investigates the capabilities of a platform for nonenzymatic glucose sensing employing a novel 3D printed three‐electrode mask‐embedded design. A reservoir‐on‐mask has been fabricated for smart sample insertion to avoid spillage. Working and counter silver electrodes are modified with three different material combinations such as graphene oxide (GO), poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and GO + PEDOT:PSS, and their performance comparison is demonstrated. It is observed that the GO + PEDOT:PSS modification shows 94.57 and 71.01% higher sensitivity than GO and PEDOT:PSS, respectively, including a higher linearity compared to its counterparts. Glucose concentrations ranging from 50 to 300 mg dL−1are detected by employing cyclic voltammetry and electrical impedance spectroscopic technique. Herein, a significantly high sensitivity of 18.8 μAmM−1 cm−2and low limit of detection ≈ 0.4 mM has been achieved for the proposed sensor. The 3D printed mask structure provides 75% higher sample retention ability, greater reliability in terms of sample placement in the sensor and improved test performances. The proposed sensor can provide a stable and large‐scale deployable solution to future biosensing platforms.

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$$\gamma = \frac{\sum \left(\right. \alpha - \langle \alpha \rangle \left.\right) \left(\right.

…”

Section: Resultsmentioning

confidence: 99%

3D Printed Design‐Assisted Multilayered Graphene Oxide‐Modified Polymer Glucose Sensor

Das,

Chugh

et al. 2023

Adv Eng Mater

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“…After the linear curve fitting in this range, the sensitivity was found to be 0.47/%. Further, the limit of detection (LOD) of the proposed sensor is calculated using the formula for linear regression [ 56,57 ]

LOD = \frac{3.3 \times Standard deviation}{Sensitivity}

, and it is found to be 0.547% = 5470 ppm. Even though NH 3 is in solution form, the ammonia gas comes out from the solution and the sensing mechanism involves adsorption process which is similar to ammonia gas sensing.…”

Section: Resultsmentioning

confidence: 99%

Washable Nanostructured Sensing Layer in a Reusable Printed Ammonia Sensor Label

Tripathy,

Bhattacharjee

2023

Adv Eng Mater

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Ammonia (NH3) in its aqueous solution form is used in various day‐to‐day applications such as laboratory reagents, fertilizers, household cleaning, etc. due to its solubility in water. Hence, it is extremely important to have a large‐scale sensing system to avoid unintended health hazards. In this paper, a printed washable TiO2 nanoparticle (NP) layer‐based sensing solution to detect evaporated ammonia from its aqueous solution has been demonstrated in this regard. The response has a range of 0.5 to 25% (w/v) and is found to be considerably linear in the low concentration level of the ammonia solution. The sensitivity is found to be 0.339/%. The sensor illustrates considerably easy fabrication, reusability, and gas adsorption on the sensing layer. Printed electrodes are employed on a flexible PET substrate with a washable sensing layer. It is observed that the longevity of the electrodes is considerably high. A maximum 7.5% variation in the response is observed for the re‐used sensor after washing. Further, it is found that the electrodes are stable enough to be used up to 4 months in ambient conditions. The sensor can be useful to monitor the leakage of NH3 solution in industrial complexes and also in households.This article is protected by copyright. All rights reserved.

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“…On the other hand, efforts have been made to explore rapid, robust and point-of-care approaches to assess food quality. In recent times, EIS measurements have gained immense popularity for detecting adulterants in food products [13][14][15][16][17][18][19][20][21]. Also, this technique has been applied to several biological systems [20,22-28[.…”

Section: Standards Authority Of India (Fssai) United States Food and ...mentioning

confidence: 99%

“…These include nuclear magnetic resonance (NMR) spectroscopy which can be used to determine the internal bruising and ripeness of fruit and vegetables [43,44]. Alternatively, optical spectroscopy techniques such as FT-IR, NIR, UV-Vis and electrical spectroscopy techniques such as EIS, electrochemical impedance spectroscopy and electrical impedance tomography techniques can be employed to detect toxic and carcinogenic adulterants in foods [13][14][15][16][17][18][19][20][21][45][46][47][48][49][50][51][52][53].…”

Section: Overcoming the Challengesmentioning

confidence: 99%

On-chip detection and quantification of soap as an adulterant in milk employing electrical impedance spectroscopy

Das

Chakraborty

Karmakar

et al. 2018

2018 International Symposium on Devices, Circuits and Systems (ISDCS)

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Electrical Impedance Spectroscopy (EIS) technique is found to be an excellent candidate for bio-sensing and food quality monitoring applications due to its rapid, robust, cost-effective and point-of-care approach. The present research work investigates the implementation of EIS technique supported by several optical spectroscopic techniques such as Ultraviolet-Visible (UV-Vis) and Fourier Transform Mid Infrared (FT-MIR) to detect and quantify several toxic adulterants in foods and bio-consumables. A comprehensive understanding on the background theory related to the study has been developed to analyze the overall polarization of the system and the effect of frequency on complex permittivity of such system have been observed. In the current work, the technique is applied to adulterated saccharides, honey and turmeric samples through a prototype sensing device. All the corresponding measurements have been performed by dipping a custom-made parallel plate conductivity cell with unity cell constant inside the solution under test. EIS study exhibited a steady variation of electrical parameters such as Contents List of Figures (i-v) List of Tables (vi-vii) List of Symbols (viii-xii) List of Publications (xiii-xvi)

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Impedimetric Approach for Estimating the Presence of Metanil Yellow in Turmeric Powder from Tunable Capacitance Measurement

Cited by 16 publications

References 38 publications

3D Printed Design‐Assisted Multilayered Graphene Oxide‐Modified Polymer Glucose Sensor

3D Printed Design‐Assisted Multilayered Graphene Oxide‐Modified Polymer Glucose Sensor

Washable Nanostructured Sensing Layer in a Reusable Printed Ammonia Sensor Label

On-chip detection and quantification of soap as an adulterant in milk employing electrical impedance spectroscopy

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