Rapid and Nondestructive Detection of Pesticide Residues by Depth-Profiling Fourier Transform Infrared Photoacoustic Spectroscopy
| Autor: | Gaoqiang Lv, Yazhen Shen, Fei Ma, Changwen Du, Jianmin Zhou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
In situ
Materials science Pesticide residue Infrared General Chemical Engineering 010401 analytical chemistry Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper Spectral line Article 0104 chemical sciences lcsh:Chemistry symbols.namesake Fourier transform lcsh:QD1-999 chemistry Absorption band symbols 0210 nano-technology Photoacoustic spectroscopy |
| Zdroj: | ACS Omega ACS Omega, Vol 3, Iss 3, Pp 3548-3553 (2018) |
| ISSN: | 2470-1343 |
| Popis: | Detection of pesticide residues is important for ensuring food safety, and it has assumed increased significance. Traditional analytical methods are known for being destructive and cost- and time-intensive. In this study, depth-profiling Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS) was successfully used as an in situ, nondestructive, and rapid method for detecting tricyclazole residues on three metal surfaces (copper, aluminum, and iron) and subsequently, on the surfaces of fresh rice leaves and ripe husks. Four moving mirror velocities, that is, 0.32, 0.63, 0.95, and 1.90 cm s-1 were used for recording the spectra. The results indicated that the moving mirror velocity of 0.95 cm s-1 was optimal for depth profiling, and the obtained spectra showed a strong absorption band at around 1200 cm-1, corresponding to the C-N bond in tricyclazole. This band could be used for monitoring tricyclazole residues on plant surfaces. Principal component analysis confirmed the detection of tricyclazole on the basis of its spectral information. Considering the scanning depth and the thickness of the plant cuticle, FTIR-PAS can be an effective means for detecting and monitoring similar organonitrogen pesticide residues. |
| Databáze: | OpenAIRE |
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