Simultaneous detection of 4-chlorophenol and 4-nitrophenol using Ti3C2Tx MXene based electrochemical sensor

The Analyst ◽  
2021 ◽  
Author(s):  
Ling Lei ◽  
Caoling Li ◽  
Wensheng Huang ◽  
K. Wu
Keyword(s):  
Electrochemical Sensor ◽  
Rapid Detection ◽  
Detection Method ◽  
Simultaneous Detection ◽  
High Toxicity

Developing sensitive and rapid detection method for 4-chlorophenol (4-CP) and 4-nitrophenol (4-NP) is very important due to their high toxicity. In this work, bulk Ti3AlC2 powder was firstly etched to...

scholarly journals MnO2@Reduced Graphene Oxide Nanocomposite-Based Electrochemical Sensor for the Simultaneous Determination of Trace Cd(II), Zn(II) and Cu(II) in Water Samples

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 517
Author(s):  
Siyamthanda Hope Mnyipika ◽  
Tshimangadzo Saddam Munonde ◽  
Philiswa Nosizo Nomngongo
Keyword(s):  
Heavy Metals ◽  
Electrochemical Sensor ◽  
Simultaneous Determination ◽  
Rapid Detection ◽  
Electrochemical Sensors ◽  
Simultaneous Detection ◽  
Cyclic Voltammograms ◽  
Current Response ◽  
Mno2 Nanoparticles

The rapid detection of trace metals is one of the most important aspect in achieving environmental monitoring and protection. Electrochemical sensors remain a key solution for rapid detection of heavy metals in environmental water matrices. This paper reports the fabrication of an electrochemical sensor obtained by the simultaneous electrodeposition of MnO2 nanoparticles and RGO nanosheets on the surface of a glassy carbon electrode. The successful electrodeposition was confirmed by the enhanced current response on the cyclic voltammograms. The XRD, HR-SEM/EDX, TEM, FTIR, and BET characterization confirmed the successful synthesis of MnO2 nanoparticles, RGO nanosheets, and MnO2@RGO nanocomposite. The electrochemical studies results revealed that MnO2@RGO@GCE nanocomposite considerably improved the current response on the detection of Zn(II), Cd(II) and Cu(II) ions in surface water. These remarkable improvements were due to the interaction between MnO2 nanomaterials and RGO nanosheets. Moreover, the modified sensor electrode portrayed high sensitivity, reproducibility, and stability on the simultaneous determination of Zn(II), Cd(II), and Cu(II) ions. The detection limits of (S/N = 3) ranged from 0.002–0.015 μg L−1 for the simultaneous detection of Zn(II), Cd(II), and Cu(II) ions. The results show that MnO2@RGO nanocomposite can be successfully used for the early detection of heavy metals with higher sensitivity in water sample analysis.

scholarly journals Waveguide-Based Fluorescent Immunosensor for the Simultaneous Detection of Carbofuran and 3-Hydroxy-Carbofuran

Biosensors ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 191
Author(s):  
Weiming Sun ◽  
Lanhua Liu ◽  
Abdul Ghaffar Memon ◽  
Xiaohong Zhou ◽  
Hongwei Zhao
Keyword(s):  
Water Quality ◽  
Monoclonal Antibody ◽  
Human Health ◽  
Broad Spectrum ◽  
Rapid Detection ◽  
Detection Method ◽  
Simultaneous Detection ◽  
Agricultural Products ◽  
Linear Detection ◽  
High Binding Affinity

Carbofuran (CBF) is an efficient and broad-spectrum insecticide. As testing indicators for water quality and agricultural products, CBF and its metabolite 3-hydroxy-carbofuran (3-OH-CBF) are regulated by many countries. The detection of CBF and 3-OH-CBF is of great importance for the environment and human health. However, an immunosensor detection method for the simultaneous analysis of CBF and 3-OH-CBF remains unavailable. Herein, we report a waveguide-based fluorescent immunosensor for detecting CBF and 3-OH-CBF, synchronously. The immunosensor is based on a broad-spectrum monoclonal antibody with high binding affinity against CBF and 3-OH-CBF. The linear detection ranges for CBF and 3-OH-CBF are 0.29–2.69 and 0.12–4.59 μg/L, with limits of detection of 0.13 μg/L for CBF and 0.06 μg/L for 3-OH-CBF, respectively. The whole detection process for each cycle is approximately 30 min. The results show a good application prospect for the rapid detection of CBF and 3-OH-CBF in water or agricultural products.

scholarly journals Immobilization-Free Electrochemical Sensor Coupled with a Graphene-Oxide-Based Aptasensor for Glycated Albumin Detection

Biosensors ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 85
Author(s):  
Wassa Waiwinya ◽  
Thitirat Putnin ◽  
Dechnarong Pimalai ◽  
Wireeya Chawjiraphan ◽  
Nuankanya Sathirapongsasuti ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Detection Method ◽  
Limit Of Detection ◽  
Glycated Albumin ◽  
Cost Effective ◽  
Logarithmic Scale ◽  
Electrochemical Aptasensor ◽  
Alternative Approach

An immobilization-free electrochemical sensor coupled with a graphene oxide (GO)-based aptasensor was developed for glycated human serum albumin (GHSA) detection. The concentration of GHSA was monitored by measuring the electrochemical response of free GO and aptamer-bound GO in the presence of glycated albumin; their currents served as the analytical signals. The electrochemical aptasensor exhibited good performance with a base-10 logarithmic scale. The calibration curve was achieved in the range of 0.01–50 µg/mL. The limit of detection (LOD) was 8.70 ng/mL. The developed method was considered a one-drop measurement process because a fabrication step and the probe-immobilization process were not required. This simple sensor offers a cost-effective, rapid, and sensitive detection method, and could be an alternative approach for determination of GHSA levels.

A simple rapid detection method of DNA based on ligation-mediated real-time fluorescence PCR

The Analyst ◽  
2013 ◽  
Vol 138 (19) ◽  
pp. 5745 ◽  
Author(s):  
Yu Qing Du ◽  
Peng Fei Gao ◽  
Wei Wang ◽  
Ting Ting Wang ◽  
Yong Chang ◽  
...  
Keyword(s):  
Real Time ◽  
Rapid Detection ◽  
Detection Method

scholarly journals Study on Migration of Two Triazine Type Ultraviolet Absorbents from Polypropylene Packaging Materials to Food Simulant

2020 ◽  
Vol 145 ◽  
pp. 01024
Author(s):  
Yue Qiu ◽  
Yan Ruan ◽  
Genrong Li
Keyword(s):  
Rapid Detection ◽  
Extraction Method ◽  
Detection Method ◽  
Migration Behavior ◽  
Contact Materials ◽  
Food Contact Materials ◽  
Food Contact ◽  
Food Simulant ◽  
Uv Absorbers ◽  
Time Required

The migration rules of two triazine type of UV absorbents (UV-1577 and UV-1579) from polypropylene (PP) food contact materials to food simulant were investigated. A rapid detection method of UV-1577 and UV-1579 in PP food contact materials was established by ultra-performance convergence chromatography (UPC2). The optimal extraction method of the initial solution was determined, and the pretreatment methods of two UV absorbents in the liquid simulants were optimized. Experiment results showed that the interaction effects between the two UV absorbers and the liquid simulants were weak, and the migration behavior was the most obvious in the fatty simulant of isooctane. At the same temperature, the migration amount of both UV-1577 and UV-1579 increased with the extension of time, and UV-1577 was more prone to migration than UV-1579. Within a certain range, the migration amount of the two UV absorbents increased significantly with the increase of the migration temperature. The higher the temperature was, the shorter the time required to reach the equilibrium.

Development of a Novel Electrochemical Sensor Based on a Carbon Paste Electrode Decorated with Nd2 O3 for the Simultaneous Detection of Tartrazine and Sunset Yellow

2018 ◽  
Vol 30 (11) ◽  
pp. 2760-2767 ◽  
Author(s):  
Karen Marquez-Mariño ◽  
Johisner Penagos-Llanos ◽  
Olimpo García-Beltrán ◽  
Edgar Nagles ◽  
John J. Hurtado
Keyword(s):  
Electrochemical Sensor ◽  
Carbon Paste Electrode ◽  
Simultaneous Detection ◽  
Carbon Paste ◽  
Sunset Yellow ◽  
Paste Electrode

A Duplex SYBR Green I-based Real-time Polymerase Chain Reaction Assay for Rapid Detection of Canine Kobuvirus and Canine Circovirus

2021 ◽  
Author(s):  
Yang Pan ◽  
Jing Chen ◽  
Junhuang Wu ◽  
Yongxia Wang ◽  
Junwei Zou ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Real Time ◽  
Rapid Detection ◽  
Simultaneous Detection ◽  
Sybr Green ◽  
Sybr Green I ◽  
Chain Reaction ◽  
Pcr Assay ◽  
Polymerase Chain ◽  
Canine Kobuvirus

Abstract Background: Canine Kobuvirus (CaKoV) and Canine Circovirus (CaCV) are viruses that infect dogs causing diarrheal symptoms that are very similar. However, there is no clinical method to detect a co-infection of these two viruses.Results: In this study, a duplex SYBR Green I-based quantitative real-time polymerase chain reaction (PCR) assay for the rapid and simultaneous detection of CaKoV and CaCV was established. CaKoV and CaCV were distinguished by their different melting temperature which was 86℃ for CaKoV and 78℃ for CaCV. The assay was highly specific, with no cross-reactivity with other common canine viruses and demonstrated high sensitivity. The detection limits of CaKoV and CaCV were 8.924 × 101 copies/μL and 3.841 × 101 copies/μL, respectively. The highest intra- and inter-assay Ct value variation coefficients (CV) of CaKoV were 0.40% and 0.96%, respectively. For CaCV, the highest intra- and inter-assay Ct value variation coefficients were 0.26% and 0.70%, respectively. In 57 clinical samples, positive detection rates of CaKoV and CaCV were 8.77% (7/57) and 15.79% (9/57), respectively. The co-infection rate was 7.02% (4/57). Conclusions: The duplex SYBR Green I-based real-time PCR assay established in this study is a fast, efficient, and sensitive method for the simultaneous detection of the two viruses and provides a powerful tool for the rapid detection of CaKoV and CaCV in clinical practice.

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