Simultaneous colorimetric determination of dopamine and ascorbic acid based on the surface plasmon resonance band of colloidal silver nanoparticles using artificial neural networks

2010 ◽  
Vol 2 (9) ◽  
pp. 1263 ◽  
Author(s):  
M. Reza Hormozi Nezhad ◽  
J. Tashkhourian ◽  
J. Khodaveisi ◽  
M. Reza Khoshi
Keyword(s):  
Neural Networks ◽  
Silver Nanoparticles ◽  
Ascorbic Acid ◽  
Artificial Neural Networks ◽  
Surface Plasmon Resonance ◽  
Colloidal Silver ◽  
Colorimetric Determination ◽  
Plasmon Resonance Band ◽  
Resonance Band

scholarly journals Determination of finasteride, indapamide and tiemonium methyl sulphate using surface plasmon resonance band of silver nanoparticles

2020 ◽  
Vol 2 (1) ◽  
pp. 5-18
Author(s):  
Magda Mohamed Ayad Ayad ◽  
Hisham Ezzat Abdellatef ◽  
Mervat Mohamed Hosny ◽  
Naglaa Abdel-Sattar Kabil
Keyword(s):  
Silver Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Surface Plasmon Resonance Band ◽  
Plasmon Resonance Band ◽  
Resonance Band

Simple and Cost Effective Polymer Modified Gold Nanoparticles Based on Colorimetric Determination of L-Cysteine in Food Samples

2021 ◽  
Vol 34 (1) ◽  
pp. 41-57
Author(s):  
Beeta Rani Khalkho ◽  
Anushree Saha ◽  
Bhuneshwari Sahu ◽  
Manas Kanti Deb
Keyword(s):  
Gold Nanoparticles ◽  
High Sensitivity ◽  
Cost Effective ◽  
Food Samples ◽  
Colorimetric Determination ◽  
Plasmon Resonance Band ◽  
Transmission Electron ◽  
Resonance Band ◽  
Absorbance Band

Abstract. The purpose of the present research was to design a method for the colorimetric determination of L-cysteine. We have employed PVA capped gold nanoparticles (GNPs) as a probe. The as-synthesized GNPs were further characterized by UV-vis absorption spectroscopy, transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and Zeta potential analyser. The results show that the presence of L-cysteine caused the quenching of the surface plasmon resonance band of the GNPs at 524 nm. It was accompanied by the appearance of a new absorbance of a new absorbance band at 670 nm. The color of the colloidal GNPs changed from wine red to blue. The change in color of the GNPs was due to their aggregation induced by the presence of L-cysteine. Based on these observations, the as-synthesized GNPs were utilized to develop a novel colorimetric sensor for L-cysteine detection in food samples. Significantly, other biomolecules such as alanine, proline, phenylalanine, tryptophane, valine, arginine, glutamic acid, lysine and histidine did not cause any change in the color of the GNPs solutions. This colorimetric probe showed excellent selectivity and high sensitivity for L-cysteine with a detection limit of 2.0 μg mL-1.

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