In situ colorimetric detection of glyphosate on plant tissues using cysteamine-modified gold nanoparticles
| Autor: | Siyue Gao, Yilei Wang, Qin Tu, Jinyi Wang, Tianxi Yang, Lili He, Qingmiao Zhang, Yanqi Qu, Zhiyun Zhang |
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| Rok vydání: | 2019 |
| Předmět: |
In situ
Cysteamine Glycine Metal Nanoparticles 02 engineering and technology 01 natural sciences Biochemistry Zea mays Analytical Chemistry chemistry.chemical_compound Spinacia oleracea Electrochemistry Environmental Chemistry Spectroscopy Chromatography biology 010401 analytical chemistry food and beverages Substrate (chemistry) Pesticide 021001 nanoscience & nanotechnology biology.organism_classification 0104 chemical sciences Plant Leaves chemistry Colloidal gold Glyphosate Malus Spinach Colorimetry Naked eye Gold 0210 nano-technology |
| Zdroj: | The Analyst. 144(6) |
| ISSN: | 1364-5528 |
| Popis: | Monitoring the levels of pesticides on plant tissues is important for achieving effective protection of crops after application, as well as ensuring low levels of residues during harvest. In this study, a simple, rapid, and fieldable colorimetric method for detecting the pesticide glyphosate (Gly) on the plant tissues in situ using cysteamine-modified gold nanoparticles (AuNPs-Cys) has been developed. The aggregation of AuNPs-Cys in the presence of Gly results in a consequent color change from red to blue (or purple), which could be observed visually on the surface of plant tissues. With the naked eye, we successfully detected Gly spiked on the surface of spinach, apple, and corn leaves in situ. Further verification and quantification were achieved using surface-enhanced Raman spectroscopy (SERS) which uses AuNPs-Cys as the substrate. Moreover, application of this method was demonstrated through the evaluation of the Gly distribution on plant tissues which could greatly facilitate the development of precision agriculture technology. |
| Databáze: | OpenAIRE |
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