Journal ArticleDOI
Miniaturized electrochemical sensor with micropillar array working electrode for trace lead online measurement in tap water
Xiangyi Hu,Hui Guo,Tong Qi,Weihua Fan,Chunping Jia,Baojian Xu,Qinghui Jin,Andreas Offenhäusser,Jianlong Zhao +8 more
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TLDR
In this paper, a compact, durable, low-reagent-usage, portable miniaturized electrochemical sensor is successfully developed for the high sensitivity detection of trace lead in tap and lake samples.Abstract:
A compact, durable, low-reagent-usage, portable miniaturized electrochemical sensor is successfully developed for the high sensitivity detection of trace lead. We fabricated micropillars array working electrodes on the chip and established ultra-low concentration sodium acetate-acetate (NaAC-HAC) buffers (pH≈4.5) system to enhance the detection sensitivity of the sensor. The ultra-low concentration buffer possesses unique features of low baseline current and high peak current difference height. The analytical performance of the fabricated electrochemical sensor with three-dimensional gold (Au) working electrodes modified by Bismuth-film was comprehensively studied. The microsensor exhibited a high sensitivity of 0.0412μAppb−1 and a satisfactory detection limit of 0.15ppb when detecting lead ions under optimized conditions. Moreover, good linearity (correlation coefficient: 0.9993) with lead ions measurement in the concentration range of 1 to 120ppb and excellent repeatability (RSD: 1.79%) was obtained. the chip has satisfactory selectivity for common Interference ion. Besides, a low consumption of 350 μL of reagents per test was acquired. Finally, the proposed microsensor was applied to detect trace metal ions in tap and lake samples with satisfactory results.read more
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Portable electrochemical sensing methodologies for on-site detection of pesticide residues in fruits and vegetables
Reddicherla Umapathi,Yunusova Nafosat Abduhamidovna,Seyed Majid Ghoreishian,Sonam Sonwal,Gokana Mohana Rani,Yun Suk Huh,Yun Suk Huh +6 more
TL;DR: In this article, a comprehensive review of portable electrochemical (bio) sensing methods for point-of-care and on-site detection of pesticides residues in fruits and vegetables is presented.
Journal ArticleDOI
Portable electrochemical sensing methodologies for on-site detection of pesticide residues in fruits and vegetables
TL;DR: In this article , a comprehensive review of portable electrochemical (bio) sensing methods for point-of-care and on-site detection of pesticides residues in fruits and vegetables is presented.
Journal ArticleDOI
Recent advances on portable sensing and biosensing assays applied for detection of main chemical and biological pollutant agents in water samples: A critical review
Hessamaddin Sohrabi,Afsaneh Hemmati,Mir Reza Majidi,Shirin Eyvazi,Ali Jahanban-Esfahlan,Behzad Baradaran,Roshanak Adlpour-Azar,Ahad Mokhtarzadeh,Miguel de la Guardia +8 more
TL;DR: In this paper, the latest improvements in portable biosensors and sensors in the monitoring of biological and chemical pollutants in different samples of water are extensively explained and the upcoming perspectives and future challenges are thoroughly described.
Journal ArticleDOI
Sensors Applied for the Detection of Pesticides and Heavy Metals in Freshwaters
Hongyong Xiang,Hongyong Xiang,Qinghua Cai,Yuan Li,Zhenxing Zhang,Lina Cao,Li Kun,Yang Haijun,Yang Haijun,Yang Haijun +9 more
TL;DR: Key Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin 130024, China Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Kunming, Yunnan 650500.
Journal ArticleDOI
Development of micropillar array electrodes for highly sensitive detection of biomarkers
TL;DR: In this article, the fabrication, simulation, surface modification, and characterization of PDMS-based micropillar array electrodes (μAEs) coated with gold films is described.
References
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