A colorimetric microfluidic sensor made by a simple instrumental-free prototyping process for sensitive quantitation of copper

Xie, Guan-Li; Yu, Hong; Deng, Muhan; Zhao, Xinlei; Yu, Ping

doi:10.1007/s11696-019-00702-3

Cited by 13 publications

(8 citation statements)

References 61 publications

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“…After the fluorescent paper sensor was developed according to the literature (Xie et al, 2019), the adjusted ratio fluorescent probe solution was added to the hydrophilic area to make it appear uniform and stable on the paper-based sensor. Different concentrations of the mercury ion solution were added to the hydrophilic area of the paper sensor.…”

Section: Paper-based Fluorescent Sensor For the Detection Of Hg 2+mentioning

confidence: 99%

Quantitative Visual Detection of Mercury Ions With Ratiometric Fluorescent Test Paper Sensor

Fan

Pan²,

Wang

et al. 2022

Front. Chem.

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A novel ratiometric fluorescence probe based on nitrogen-doped blue carbon dots (NCDs) and red gold nanoclusters (Au NCs) for mercuric ion (Hg2+) has been prepared and characterized. A user friendly fluorescent test paper based sensor combined with smartphone was fabricated for rapid visual and quantitative detection. Hg2+ can specifically bind to Au+ on the surface of Au NCs, leading to the quench of red fluorescence while the fluorescence intensity of the NCDs with blue fluorescence remained unchanged as a internal standard signal. The implement of paper-based sensor address some common drawback in analytical process such as the detection time, analysis cost. In a further demonstration, a homemade detection device with smartphone was used to qualify the Hg2+. After adding different concentration of Hg2+, red, purple, and blue colors were obtained on the detection zones of the fluorescent test paper. The Android App Color Grab was used to identify the red, green and blue (RGB) values of fluorescent color. The rapid visual and quantitative detection of Hg2+ was accomplished with the detection limit of 2.7 nM for fluorescence, 25 nM for smartphone and 32 nM for paper strip. The developed multi-mode detection platform was successfully applied to the detection of mercury ions in water samples with acceptable recoveries. The NCDs and Au NCs probe facilitate the one-site environmental monitoring for Hg2+ with “naked-eye” and smartphone.

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Section: Paper-based Fluorescent Sensor For the Detection Of Hg 2+mentioning

confidence: 99%

Quantitative Visual Detection of Mercury Ions With Ratiometric Fluorescent Test Paper Sensor

Fan

Pan²,

Wang

et al. 2022

Front. Chem.

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“…There have been major advancements recently in technologies for in situ metal concentration monitoring, mostly based on the following technologies: voltammetry (Holmes et al 2018;Wu et al 2019), aptasensors (Varun and Daniel 2018), near infrared (Iqbal et al 2017), fluorescence and colorimetric (Guo et al 2019;Tan et al 2016), colorimetric microfluidic (Xie et al 2019), optical fibre-based sensors (Kopitzke and Geissinger 2014). Among existing commercial anodic stripping voltammetry (ASV)-based analysers, there are PDV6000ultra and Metalyser ® Portable HM1000, developed by Trace 2 O and Modern Water, respectively, that offers portability, multimetal detection and relative fast measurement time (Barton et al 2016).…”

Section: Metal Pollution and Monitoring Challengesmentioning

confidence: 99%

Functionalised microwave sensors for real-time monitoring of copper and zinc concentration in mining-impacted water

Frau

Wylie

Byrne

et al. 2019

Int. J. Environ. Sci. Technol.

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Microwave spectroscopy has been identified as a novel and inexpensive method for the monitoring of water pollutants. Integrating microwave sensors with developed coatings is a novel strategy to make the sensing system more specific for a target contaminant. This study describes the determination of copper and zinc concentration in water in both laboratory-prepared and acquired mine water samples from two abandoned mining areas in Wales, UK. Uncoated sensors immersed in samples spiked with 1.25 mg/L concentrations of copper and zinc, using the standard addition method, were able to quantify the concentration at 0.44 GHz with a strong linear correlation (R2 = 0.99) for the reflection coefficient magnitude (|S11|). Functionalised microwave sensors with l-cysteine, chitosan and bismuth zinc cobalt oxide-based coatings have shown improvement in the sensing performance. Specifically, the linear correlation at 0.91–1.00 GHz between |S11| and a polluted water sample spiked with Cu showed a higher (R2 = 0.98), sensitivity (1.65 ΔdB/mg/L) and quality factor (135) compared with uncoated sensors (R2 = 0.88, sensitivity of 0.82 ΔdB/mg/L and Q-factor 30.7). A Lorentzian peak fitting function was applied for performing advanced multiple peak analysis and identifying the changes in the resonant frequency peaks which are related to the change in metal ion content. This novel sensor platform offers the possibility of in situ monitoring of toxic metal concentrations in mining-impacted water, and multiple peak features, such as area, full width half maximum, centre and height of the peaks, have the possibility to offer higher specificity for similar toxic metals, as between copper and zinc ions.

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“…24 Although these work have made a huge contribution to the eld of PoP-based mPADs, the hydrophobic barrier is still constructed with wax in most of the methods, which cannot support solutions such as surfactants and organic solvents. 25 Therefore, our group have tried to use other substances to construct the hydrophobic boundaries of mPADs [26][27][28][29][30] and found that adhesive tape performed very good hydrophobicity. 28 Inspired by this, double-sided adhesive tape could be used as the main ingredient to manufacture the ink, paving a new way for the development of the PoP fabrication strategy.…”

Section: Introductionmentioning

confidence: 99%

Semi-quantitative analysis of nickel: counting-based μPADs built via hand drawing and yellow oily double-sided adhesive tape

Wang

Yang

et al. 2022

RSC Adv.

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A colorimetric microfluidic sensor made by a simple instrumental-free prototyping process for sensitive quantitation of copper

Cited by 13 publications

References 61 publications

Quantitative Visual Detection of Mercury Ions With Ratiometric Fluorescent Test Paper Sensor

Quantitative Visual Detection of Mercury Ions With Ratiometric Fluorescent Test Paper Sensor

Functionalised microwave sensors for real-time monitoring of copper and zinc concentration in mining-impacted water

Semi-quantitative analysis of nickel: counting-based μPADs built via hand drawing and yellow oily double-sided adhesive tape

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