Employing a fluorescent and colorimetric picolyl-functionalized rhodamine for the detection of glyphosate pesticide

The ongoing poisoning of agricultural products has pushed the security problem to become an important issue. Among them, exceeding the standard rate of pesticide residues is the main factor influencing the quality and security of agricultural products. Monitoring pesticide residues and developing si...

Full description

Saved in:
Bibliographic Details
Published in:Talanta (Oxford) 2021-03, Vol.224, p.121834, Article 121834
Main Authors: Guan, Jianping, Yang, Jiao, Zhang, Yue, Zhang, Xiaoxue, Deng, Huajuan, Xu, Juan, Wang, Jinyi, Yuan, Mao-Sen
Format: Article
Language:English
Subjects:
Chemosensor
Glyphosate
Pesticide residue
Rhodamine
Ultrasensitive detection
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The ongoing poisoning of agricultural products has pushed the security problem to become an important issue. Among them, exceeding the standard rate of pesticide residues is the main factor influencing the quality and security of agricultural products. Monitoring pesticide residues and developing simple, yet ultrasensitive detection systems for pesticide residues are urgently needed. In this study, we successfully developed a novel rhodamine derivative as fluorescent and colorimetric chemosensor R-G for the rapid, selective and ultrasensitive detection of glyphosate pesticide residue in aqueous solution. Through a Cu2+-indicator displacement strategy, glyphosate can displace an indicator (R-G) from a Cu2+-indicator complex due to its strong affinity to bind with Cu2+ to give a turn-on fluorescence and distinct color change. Moreover, a test strip was also fabricated to achieve a facile detection of glyphosate pesticide. To demonstrate the possibility of practical applications, glyphosate was detected on the surface of cabbage and in a spiked soil sample. The detection limit of 4.1 nM and the response time of 2 min indicate that the method is enough sensitive and rapid to detect the glyphosate residue at or below levels that pose a health risk. [Display omitted] •A new rhodamine derivative was synthesized as glyphosate sensor.•It exhibited obvious fluorescence enhancement and chromogenic change for glyphosate.•It can rapidly and super-sensitively detect glyphosate residue.•The test strip was fabricated to achieve a facile detection of glyphosate.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2020.121834