A simple approach for the ultrasensitive detection of paraquat residue in adzuki beans by surface-enhanced Raman scattering

Paraquat (PQ), a broad-spectrum contact herbicide, has been used in many countries for controlling weed growth in agriculture because of its quick-acting and nonselective contact with green plant tissue. PQ is also toxic to humans, and even contributes to the development of neurodegenerative disease...

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Bibliographic Details
Published in:Analyst (London) 2019-01, Vol.144 (2), p.426-438
Main Authors: Tsen, Chao-Ming, Yu, Ching-Wei, Chuang, Wei-Chen, Chen, Ming-Jun, Lin, Shao-Kai, Shyu, Tsyr-Horng, Wang, Yung-Hsiang, Li, Cheng-Chien, Chao, Wei-Chung, Chuang, Chun-Yu
Format: Article
Language:English
Subjects:
Beans
Formic acid
Legumes
Nanoparticles
Neurological diseases
Paraquat
Pesticides
Raman spectra
Raman spectroscopy
Shaking
Silver
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Summary:Paraquat (PQ), a broad-spectrum contact herbicide, has been used in many countries for controlling weed growth in agriculture because of its quick-acting and nonselective contact with green plant tissue. PQ is also toxic to humans, and even contributes to the development of neurodegenerative diseases. However, PQ is generally excluded from pesticide residue monitoring programs due to the lack of suitable determination methods. Thus, this study developed a detection method combined with simple extraction and surface-enhanced Raman spectroscopy (SERS) to rapidly determine and quantify the PQ residue on legumes without destructive procedures and high-cost instruments. Following the extraction procedure of the QuPPe-method, however, we took whole adzuki beans ( Vigna angularis ) extracted via a mixture of methanol and 1% formic acid at room temperature and followed by a 1 min cleanup by SPE. The PQ values for adzuki beans determined by LC/MSMS showed that regardless of whether extraction was followed by the QuPPe-method or the method we proposed, a consistent and low relative standard deviation (RSD) below
ISSN:0003-2654
1364-5528
DOI:10.1039/c8an01845f