scholarly journals A pH-stable Ag(i) multifunctional luminescent sensor for the efficient detection of organic solvents, organochlorine pesticides and heavy metal ions

RSC Advances ◽  
2020 ◽  
Vol 10 (73) ◽  
pp. 44712-44718
Author(s):  
Jianxin Ma ◽  
Yue Wang ◽  
Guocheng Liu ◽  
Na Xu ◽  
Xiuli Wang
Keyword(s):  
Heavy Metal ◽  
Detection Limit ◽  
Metal Ions ◽  
Organochlorine Pesticides ◽  
Organic Solvents ◽  
Heavy Metal Ions ◽  
Ph Stability ◽  
Low Detection Limit ◽  
Luminescent Sensor ◽  
Efficient Detection

3D supramolecular LCP 1 can detect Hacac, NB, 2,6-DCN, Fe2+, Hg2+, and Fe3+ with a low detection limit and pH stability.

Ultrasensitive diffraction gratings based on smart hydrogels for highly selective and rapid detection of trace heavy metal ions

2018 ◽  
Vol 6 (42) ◽  
pp. 11356-11367 ◽  
Author(s):  
Han-Yu Peng ◽  
Wei Wang ◽  
Fuhua Gao ◽  
Shuo Lin ◽  
Lu-Yue Liu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Detection Limit ◽  
Metal Ions ◽  
Rapid Detection ◽  
Heavy Metal Ions ◽  
Diffraction Gratings ◽  
Low Detection Limit ◽  
Smart Hydrogel

A smart-hydrogel-based ultrasensitive grating system with ultra-low detection limit for highly-selective and rapid detection of trace heavy metal ions is developed.

scholarly journals Fabrication of novel polymer-modified graphene-based electrochemical sensor for the determination of mercury and lead ions in water and biological samples

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chenthattil Raril ◽  
Jamballi G. Manjunatha
Keyword(s):  
Heavy Metal ◽  
Detection Limit ◽  
Metal Ions ◽  
Biological Samples ◽  
Heavy Metal Ions ◽  
Electrochemical Techniques ◽  
Differential Pulse ◽  
Modified Graphene ◽  
Water And Biological Samples

Abstract Background This paper presents the application of polyglycine-modified graphene paste electrode (PGMGPE) for the electrochemical detection of Hg (II) and Pb (II) ions in the water and biological samples. Method The developed electrode was characterized by field emission scanning electron microscopy. Electrochemical techniques such as cyclic voltammetry and differential pulse voltammetry were used to study the behavior of metal ions. Results The modification process improves the electrochemical behavior of heavy metal ions. The peak current varied linearly with the increase of the concentration leading to a detection limit of 6.6 μM (Hg (II)) and 0.8 μM (Pb (II)), respectively. Conclusion The developed electrode exhibits good sensitivity, selectivity, stability, and lower detection limit, and was successfully applied to the determination of heavy metal ions in water and biological samples with a good recovery range.

A Highly Stable Eu−MOF Multifunctional Luminescent Sensor for the Effective Detection of Fe3+, Cr2O72−/CrO42− and Aspartic Acid in Aqueous Systems

CrystEngComm ◽  
2022 ◽  
Author(s):  
Yin-Xia Sun ◽  
Geng Guo ◽  
Wenmin Ding ◽  
Wenyu Han ◽  
Juan Li ◽  
...  
Keyword(s):  
Water Pollution ◽  
Amino Acids ◽  
Heavy Metal ◽  
Metal Ions ◽  
Aspartic Acid ◽  
Heavy Metal Ions ◽  
Aqueous Systems ◽  
Luminescent Sensor

Heavy metal ions were common pollutants in water pollution. Amino acids, as important substances in organisms, participate in many life activities. The detection of heavy metal ions and amino acids...

A self-supported electrochemical sensor for simultaneous sensitive detection of trace heavy metal ions based on PtAu alloy/carbon nanofibers

2017 ◽  
Vol 9 (48) ◽  
pp. 6801-6807 ◽  
Author(s):  
SongGe Zhang ◽  
Han Zhu ◽  
PiMing Ma ◽  
Fang Duan ◽  
WeiFu Dong ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Detection Limit ◽  
Metal Ions ◽  
Electrochemical Sensor ◽  
Carbon Nanofibers ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Alloy Carbon

The key issue in efficient electrochemical detection of trace heavy metal ions (HMIs) is to design hierarchical nanostructure electrodes with high sensitivity and low detection limit.

scholarly journals Novel Diazocrowns with Pyrrole Residue as Lead(II)Colorimetric Probes

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7239
Author(s):  
Błażej Galiński ◽  
Elżbieta Luboch ◽  
Jarosław Chojnacki ◽  
Ewa Wagner-Wysiecka
Keyword(s):  
Heavy Metal ◽  
Detection Limit ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Spectral Response ◽  
Hydrocarbon Chain ◽  
High Dilution ◽  
Aromatic Diamines ◽  
Aqueous Acetonitrile ◽  
X Ray

Novel 18- and 23-membered diazomacrocycles were obtained with satisfactory yields by diazocoupling of aromatic diamines with pyrrole in reactions carried under high dilution conditions. X-ray structure of macrocycle bearing five carbon atoms linkage was determined and described. Compounds were characterized as chromogenic heavy metal ions receptors. Selective color and spectral response for lead(II) was found in acetonitrile and its mixture with water. Complexation properties of newly obtained macrocycles with a hydrocarbon chain were compared with the properties of their oligoether analogs. The influence of the introduction of hydrocarbon residue as a part of macrocycle on the lead(II) binding was discussed. Selective and sensitive colorimetric probe for lead(II) in aqueous acetonitrile with detection limit 56.1 mg/L was proposed.

scholarly journals Construction of a mApple-D6A3-mediated biosensor for detection of heavy metal ions

AMB Express ◽  
2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yangyang Ji ◽  
Feifei Guan ◽  
Xin Zhou ◽  
Xiaoqing Liu ◽  
Ningfeng Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Fluorescence Intensity ◽  
Heavy Metal Ions ◽  
Fluorescent Protein ◽  
Low Cost ◽  
Detection Methods ◽  
Titration Calorimetry ◽  
Efficient Detection

AbstractPollution of heavy metals in agricultural environments is a growing problem to the health of the world’s human population. Green, low-cost, and efficient detection methods can help control such pollution. In this study, a protein biosensor, mApple-D6A3, was built from rice-derived Cd2+-binding protein D6A3 fused with the red fluorescent protein mApple at the N-terminus to detect the contents of heavy metals. Fluorescence intensity of mApple fused with D6A3 indicated the biosensor’s sensitivity to metal ions and its intensity was more stable under alkaline conditions. mApple-D6A3 was most sensitive to Cu2+, then Ni2+, then Cd2+. Isothermal titration calorimetry experiments demonstrated that mApple-D6A3 successfully bound to each of these three metal ions, and its ability to bind the ions was, from strongest to weakest, Cu2+  > Cd2+  > Ni2+. There were strong linear relationships between the fluorescence intensity of mApple-D6A3 and concentrations of Cd2+ (0–100 μM), Cu2+ (0–60 μM) and Ni2+ (0–120 μM), and their respective R2 values were 0.994, 0.973 and 0.973. When mApple-D6A3 was applied to detect concentrations of heavy metal ions in water (0–0.1 mM) or culture medium (0–1 mM), its accuracy for detection attained more than 80%. This study demonstrates the potential of this biosensor as a tool for detection of heavy metal ions.

Spirobifluorene-based water-soluble imidazolium polymer for luminescent sensing

2021 ◽  
Author(s):  
Caifeng Wei ◽  
Jinyi Wu ◽  
Xiying Feng ◽  
Zujing Yang ◽  
Jianyong Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Fluorescence Detection ◽  
Heavy Metal Ions ◽  
Industrial Development ◽  
High Selectivity ◽  
Water Soluble ◽  
Luminescent Sensor ◽  
Luminescent Sensing

With increasing industrial development, heavy metal ions have been widely released, and fluorescence detection is an effective approach owing to high selectivity and sensitivity. Herein, a water-soluble luminescent sensor based...

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