Highly Sensitive Detection of Thiabendazole Residues in Food Samples Based on Multiwall Carbon Nanotubes Decorated Two-Dimensional Layered Molybdenum Disulfide

2020 ◽  
Vol 13 (3) ◽  
pp. 811-822 ◽  
Author(s):  
Fuliang Cheng ◽  
Xiaoning Liao ◽  
Zhiwen Huang ◽  
Liting Xu ◽  
Ying Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molybdenum Disulfide ◽  
Multiwall Carbon Nanotubes ◽  
Food Samples ◽  
Sensitive Detection ◽  
Two Dimensional ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Multiwall Carbon

Novel Cd(II) Ion Imprinted Polymer Coated on Multiwall Carbon Nanotubes as a Highly Selective Sorbent for Cadmium Determination in Food Samples

2014 ◽  
Vol 97 (1) ◽  
pp. 173-178 ◽  
Author(s):  
Forouzan Aboufazeli ◽  
Hamid Reza Lotfi Zadeh Zhad ◽  
Omid Sadeghi ◽  
Mohammad Karimi ◽  
Ezzatollah Najafi
Keyword(s):  
Carbon Nanotubes ◽  
Multiwall Carbon Nanotubes ◽  
Food Samples ◽  
Standard Reference Materials ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Ion Imprinted ◽  
Low Levels ◽  
Multiwall Carbon

Abstract The application of a novel Cd(II) ion imprinted polymer coated on multiwall carbon nanotubes was investigated for preconcentration and determination of low levels of Cd ions. This novel sorbentwas characterized by scanning electron microscopy, thermal gravimetric/differential thermal analysis, elemental analysis, and FTIR spectrometry. Effects of various factors, such as pH of the sample solution, eluent (type, concentration, and volume), and flow rates of the sample and eluent, were evaluated in this study. To investigate the selectivity of the sorbent toward Cd(II) ions, the effects of a variety of ions on preconcentration and recovery of Cd(II) ions were investigated. TheLOD was 1.3 ng/mL; the recovery and RSD of the method were 96.4% and below 3.1%, respectively. Validation of the method was performed by analyzing some standard reference materials with certified Cd(II) concentrations. Finally, the sorbent was applied for separation and determination of Cd(II)ions in food samples.

Highly sensitive detection for cocaine using an aptamer–cocaine–aptamer method

2020 ◽  
Vol 44 (6) ◽  
pp. 2571-2577 ◽  
Author(s):  
Li Gao ◽  
Huixing Wang ◽  
Zebin Deng ◽  
Wenwen Xiang ◽  
Haifeng Shi ◽  
...  
Keyword(s):  
Composite Material ◽  
Gold Nanoparticle ◽  
Molybdenum Disulfide ◽  
False Positive ◽  
Physical Adsorption ◽  
Sensitive Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

In this study, a thiol-modified aptamer was immobilized on a gold nanoparticle-modified molybdenum disulfide composite material (MoS2@AuNPs), which could remove the interference of physical adsorption and reduce false positive signals.

Simultaneous detection of Dopamine and Serotonin in real complex matrices

2020 ◽  
Vol 16 ◽  
Author(s):  
Florina Truţă ◽  
Mihaela Tertisa ◽  
Cecilia Cristea ◽  
Florin Graur
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Simultaneous Detection ◽  
Multiwall Carbon Nanotubes ◽  
Differential Pulse ◽  
Sensitive Detection ◽  
Complex Matrices ◽  
Simple Method ◽  
Starting Point ◽  
Highly Sensitive Detection

Background: Neurotransmitters are chemical messengers with crucial implication in human body. Perturbations in concentration of neurotransmitters can affect a multitude of mental and physical functions, such as heart rate, sleep, appetite and mood. Thus, the sensitive detection of these compounds is a real need for a new generation of treatments. Method: Two important neurotransmitters namely dopamine and serotonin were investigated in this study for simultaneous detection using differential pulse voltammetry. The optimization of several surface parameters were performed in order to choose the best electrode material for electrochemical oxidation of targets. Screen printed electrodes based on carbon, gold and platinum and modified with different nanomaterials (carbon nanotubes, gold nanoparticles and carbon nanotubes decorated with gold nanoparticles) were tested. Results: Carbon-based electrodes modified with multiwall carbon nanotubes and gold nanoparticles were chosen after the optimization protocol. Linear correlations between the analytic signals obtained and the concentration of dopamine and serotonin respectively were obtained with good sensitivity and the detection limits were 0.3 µM for dopamine and 0.8 µM for serotonin with no significant reciprocal influences. Selectivity studies were also performed, as well as tests in real samples (e.g. human serum, tears and saliva) complex matrices for which acceptable recoveries were obtained. Conclusion: The results obtained within this study can be considered as an important starting point for the development of a fast and simple method for selective and highly sensitive detection of neurotransmitters, with possible applications in the diagnosis of different pathologies and for monitoring the effectiveness of the applied drug treatment.

A novel electrochemiluminescence immunosensing strategy fabricated by Co(OH)2 Two-dimensional Nanosheets and Ru@SiO2-Au NPs for highly sensitive detection of enrofloxacin

The Analyst ◽  
2021 ◽  
Author(s):  
Mengqi Jiao ◽  
Jiaxin Zhang ◽  
Kang Wu ◽  
Anping Deng ◽  
Jianguo Li
Keyword(s):  
Sensitive Detection ◽  
Silica Spheres ◽  
Two Dimensional ◽  
Au Nps ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

In this work, a novel sensitive electrochemiluminescence immunosensor based on Ru@SiO2-Au NPs and Co(OH)2 two-dimensional nanosheets (2D Co(OH)2) is constructed for the detection of enrofloxacin (ENR). Ruthenium bipyridine silica spheres...

scholarly journals Two-dimensional Layered MoS2 Biosensors Enable Highly Sensitive Detection of Biomolecules

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Joonhyung Lee ◽  
Piyush Dak ◽  
Yeonsung Lee ◽  
Heekyeong Park ◽  
Woong Choi ◽  
...  
Keyword(s):  
Sensitive Detection ◽  
Two Dimensional ◽  
Highly Sensitive ◽  
Detection Of Biomolecules ◽  
Highly Sensitive Detection ◽  
Layered Mos2
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