Fast sensing of imidacloprid residue in tea using surface-enhanced Raman scattering by comparative multivariate calibration
| Autor: | Huanhuan Li, Mehedi Hassan, Pingyue Wang, Akwasi Akomeah Agyekum, Yi Xu, Annavaram Viswadevarayalu, Quansheng Chen, Muhammad Zareef, Felix Y.H. Kutsanedzie, Jing Xu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Silver
Correlation coefficient Analytical chemistry Food Contamination 02 engineering and technology 010402 general chemistry Spectrum Analysis Raman 01 natural sciences Analytical Chemistry law.invention Chemometrics chemistry.chemical_compound symbols.namesake Neonicotinoids Adsorption X-Ray Diffraction Imidacloprid law Limit of Detection Least-Squares Analysis Instrumentation Spectroscopy Residue (complex analysis) Tea Substrate (chemistry) 021001 nanoscience & nanotechnology Laser Nitro Compounds Atomic and Molecular Physics and Optics 0104 chemical sciences Nanostructures chemistry Calibration symbols Microscopy Electron Scanning 0210 nano-technology Raman scattering Algorithms |
| Zdroj: | Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 211 |
| ISSN: | 1873-3557 |
| Popis: | This study focused on the fabrication of a rapid, highly sensitive and inexpensive technique for the quantification of imidacloprid residue in green tea, based on surface-enhanced Raman scattering (SERS) using highly roughned surface flower shaped silver nanostructure (as SERS substrate) coupled with the chemometrics algorithm. The basic principle of this method is imidacloprid yielded SERS signal after adsorption on Ag-NF under laser excitation by the electromagnetic enhancement and the intensity of the peak is proportional to the concentration ranging from 1.0 × 103 to 1.0 × 10−4 μg/mL. Among the models used, the GA-PLS (Genetic algorithm-partial least square) exhibited superiority to quantify imidacloprid residue in green tea. The model achieved Rp (correlation coefficient) of 0.9702 with RPD of 4.95% in the test set and RSD for precision recorded up to 4.50%. Therefore, the proposed sensor could be employed to quantify imidacloprid residue in green tea for the safeguarding of quality and human health. |
| Databáze: | OpenAIRE |
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