| 000 | 02672nam a2200301Ia 4500 | ||
|---|---|---|---|
| 003 | MX-MdCICY | ||
| 005 | 20250625162445.0 | ||
| 040 | _cCICY | ||
| 090 | _aB-20221 | ||
| 245 | 1 | 0 | _aCitrate functionalized gold nanoparticles assisted micro extraction of L-cysteine in milk and water samples using Fourier transform infrared spectroscopy |
| 490 | 0 | _vSpectrochimica Acta Part A: Molecular and BioMolecular Spectroscopy, 267, p.120523, 2022 | |
| 520 | 3 | _aThis paper describes the sensing application of citrate functionalized gold nanoparticles (AuNPs)employing for the determination of L-cysteine in food and water samples. It is established with diffuse reflectance Fourier transform infrared (DRS-FTIR)spectroscopic analysis. The disappearance of the thiol (-SH)band in the FTIR spectra and the shift in the peaks of the amino group (NH3+)and carboxylate group (-COO-)indicated the Au-S interaction and the aggregation of the NPs. The signal intensity of L-cysteine was enhanced due to hot-spots formed by the aggregation of AuNPs producing the effective absorption of electromagnetic radiation in the IR region for molecular vibration. The relationship between AuNPs and L-cysteine was theoretically investigated by the Density Function Theory (DFT)based on LANL2DZ with the aid of the Gaussian 09 (C.01)software. Interaction between AuNPs and L-cysteine molecules resulted to a shift to higher wavelengths in the plasmon bands, further verified by transmission electron microscopes (TEM), which have indicated random aggregated particles. Further dynamic light scattering (DLS)measurements showed a relatively high degree of polydispersity confirming the aggregation of the particles. Under optimized conditions, the calibration curve showed a good linearity range from 20 to 150 ?g mL?1 with a correlation coefficient (R2)0.990. The limit of detection and quantification were 1.04 and 3.44 ?g mL?1, respectively by DRS-FTIR. This modified AuNPs sample was used successfully in milk and water samples with adequate results to determine L-cysteine. | |
| 650 | 1 | 4 | _aL-CYSTEINE |
| 650 | 1 | 4 | _aGOLD NANOPARTICLES |
| 650 | 1 | 4 | _aDIFFUSE REFLECTANCE-FOURIER TRANSFORM |
| 650 | 1 | 4 | _aINFRARED SPECTROSCOPY |
| 650 | 1 | 4 | _aMILK AND WATER SAMPLES |
| 700 | 1 | 2 | _aKhalkho, B. R. |
| 700 | 1 | 2 | _aDeb, M. K. |
| 700 | 1 | 2 | _aKurrey, R. |
| 700 | 1 | 2 | _aSahu, B. |
| 700 | 1 | 2 | _aSaha, A. |
| 700 | 1 | 2 | _aPatle, T. K. |
| 700 | 1 | 2 | _aShrivas, K. |
| 856 | 4 | 0 |
_uhttps://drive.google.com/file/d/1ZYgCUGY-2SiICdfvNeZ3oWBDIsHHXFwO/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
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