Quantification of leuco-indigo in indigo-dye-fermenting suspension by normal pulse voltammetry

Kikuchi, Mayu; Sowa, Keisei; Takeuchi, Mitsuaki; Nakagawa, Kasumi; Matsunaga, Momoka; Ando, Akinori; Kano, Kenji; Ogawa, Jun; Sakuradani, Eiji

doi:10.1016/j.jbiosc.2022.04.009

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…Not only used in medical-related research, NPV can also be used to detect leuco-indigo, which plays a role in the dyeing process of Aizome clothes, Japanese indigo-dyeing [15]. Thus, the steady-state concentration profile can be discussed from the kinetics of leuco-indigo microbial generation and their consumption by autoxidation.…”

Section: ) Normal Pulse Voltammetry (Npv)mentioning

confidence: 99%

“…Square wave voltammetry (SWV) helped to understand the mechanism of action of drugs, the acid-base dissociation constant (or pKa) [14]. In other fields besides the medical, normal pulse voltammetry (NPV) can be used to detect leuco-indigo, which plays a role in dyeing clothes Aizome, Japanese indigo-dyeing [15]. These measurement methods can be integrated to be complementary in supporting the results of the research carried out, such as chronoamperometric (CA), which is a complementary part of the CV measurements, for the measurement of glyphosate (GLY), a broad-spectrum herbicide and pesticide whose function is to assess the ecotoxicological impact [16].…”

Section: Introductionmentioning

confidence: 99%

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ESPotensio: A Low-Cost and Portable Potentiostat With Multi-Channel and Multi-Analysis Electrochemical Measurements

et al. 2022

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Electrochemical method is often chosen to analyze various bio-chemical reactions due to its operation simplicity with versatile applications. Thus, for this purpose, the procurement of potentiostat, an electrochemical-based analysis instrument, also needs to focus on the low price, but maintaining its rich analysis features. In this paper, we designed a low-cost and portable potentiostat system based on the ESP32 microcontroller. Even with the low-cost system design, it supports various electrochemical measurement methods, i.e. cyclic voltammetry (CV), linear sweep voltammetry (LSV), square wave voltammetry (SWV), differential pulse voltammetry (DPV), normal pulse voltammetry (NPV), and the observation of electrochemical current against time based on chronoamperometry measurement method. The potentiostat performance was assessed by the electrochemical signal accuracy and errors. Furthermore, the measurements can also be carried out semi-parallelly within three measurement channels simultaneously. The results showed that it could produce voltammograms with an average accuracy of more than 90%, compared to the commercial Emstat Pico. Even though having this comprehensive and extensive electrochemical analysis, the cost of the total system realization could be downsized to only USD 21.4.

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Section: ) Normal Pulse Voltammetry (Npv)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ESPotensio: A Low-Cost and Portable Potentiostat With Multi-Channel and Multi-Analysis Electrochemical Measurements

et al. 2022

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“…Utilizing high surface area catalysts to facilitate electron transfer in electrochemical reduction is a promising strategy that has been successfully applied to numerous organic reactions. − In the context of indigo dye reduction, the molecular indigo (C 16 H 10 N 2 O 2 ) undergoes electron transfer reactions to convert into its soluble reduced form, leuco-indigo. − This process involves the reduction of double bonds and heterocyclic structures within the indigo molecule. In electrochemical methods, active hydrogen (or protons) are generated through the electrocatalytic process using water as the proton donor, providing a green and sustainable pathway for indigo dye reduction. , However, the crux of this technology lies in the precise control of active hydrogen generation during the hydrogen evolution reaction (HER) and the coadsorption of indigo molecules on the catalyst surface.…”

Section: Introductionmentioning

confidence: 99%

Vat Dye Molecule–Proton Dual Adsorption Catalysis Based on Molybdenum Disulfide for Sustainable Textile Dyeing

Wang,

Luo,

Ding

et al. 2024

ACS Sustainable Chem. Eng.

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The annual global output of denim exceeds a staggering 9 billion meters, valued at over $25 billion. The conventional production relies on sodium dithionite for indigo dye reduction, a costly process that also generates environmentally harmful wastewater with sulfite and sulfate ions. Addressing these issues, we present an eco-friendly, cost-effective electrochemical reduction approach using a novel molybdenum disulfide (MoS2) molecule–proton dual adsorption system for the electrocatalytic hydrogenation (ECH) of indigo dye. This system facilitates a phase shift from 2H to 1T in MoS2 by intercalating organic amine cations, enhancing the coadsorption of active hydrogen and indigo molecules, thereby boosting the ECH activity. The dimethylamine-cation intercalated MoS2 electrode material (MoS2-DMA-CF) achieves over 95% dye reduction efficiency and more than 75% faradaic efficiency in ECH, surpassing traditional methods with a 25% increase in K/S value, improved color fastness, and less than 5% color variation after 10 cycles. Additionally, this method reduces energy consumption by 92.424% and dyeing costs by 90.416%, with the dyeing wastewater exhibiting excellent biodegradability, offering substantial environmental benefits. This innovative approach not only yields significant cost savings but is also highly scalable, providing a sustainable solution for denim fabrication.

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A collection of the best practice examples of electroanalytical applications in education: from polarography to sensors

Cetinkaya,

Kaya,

Ozkan

2023

J Solid State Electrochem

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Quantification of leuco-indigo in indigo-dye-fermenting suspension by normal pulse voltammetry

Cited by 5 publications

References 10 publications

ESPotensio: A Low-Cost and Portable Potentiostat With Multi-Channel and Multi-Analysis Electrochemical Measurements

ESPotensio: A Low-Cost and Portable Potentiostat With Multi-Channel and Multi-Analysis Electrochemical Measurements

Vat Dye Molecule–Proton Dual Adsorption Catalysis Based on Molybdenum Disulfide for Sustainable Textile Dyeing

A collection of the best practice examples of electroanalytical applications in education: from polarography to sensors

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