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A Portable Integrated Electrochemical Sensing System for On-Site Nitrite Detection in Food.
- Source :
-
Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 May; Vol. 20 (22), pp. e2309357. Date of Electronic Publication: 2023 Dec 15. - Publication Year :
- 2024
-
Abstract
- Ensuring an appropriate nitrite level in food is essential to keep the body healthy. However, it still remains a huge challenge to offer a portable and low-cost on-site food nitrite analysis without any expensive equipment. Herein, a portable integrated electrochemical sensing system (IESS) is developed to achieve rapid on-site nitrite detection in food, which is composed of a low-cost disposable microfluidic electrochemical patch for few-shot nitrite detection, and a reusable smartphone-assisted electronic device based on self-designed circuit board for signal processing and wireless transmission. The electrochemical patch based on MXene-Ti <subscript>3</subscript> C <subscript>2</subscript> T <subscript>x</subscript> /multiwalled carbon nanotubes-cyanocobalamin (MXene/MWCNTs-VB <subscript>12</subscript> )-modified working electrode achieves high sensitivity of 10.533 µA mm <superscript>-1</superscript> and low nitrite detection limit of 4.22 µm owing to strong electron transfer ability of hybrid MXene/MWCNTs conductive matrix and high nitrite selectivity of VB <subscript>12</subscript> bionic enzyme-based ion-selective layer. Moreover, the portable IESS can rapidly collect pending testing samples through a microfluidic electrochemical patch within 1.0 s to conduct immediate nitrite analysis, and then wirelessly transmit data from a signal-processing electronic device to a smartphone via Bluetooth module. Consequently, this proposed portable IESS demonstrates rapid on-site nitrite analysis and wireless data transmission within one palm-sized electronic device, which would pave a new avenue in food safety and personal bespoke therapy.<br /> (© 2023 Wiley‐VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1613-6829
- Volume :
- 20
- Issue :
- 22
- Database :
- MEDLINE
- Journal :
- Small (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 38102797
- Full Text :
- https://doi.org/10.1002/smll.202309357