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Detection of glyphosate with a copper(II)-pyrocatechol violet based GlyPKit.

Prerna Yadav¹, Felix Zelder¹

¹Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland. felix.zelder@chem.uzh.ch.

Analytical Methods : Advancing Methods and Applications

|September 27, 2021

Summary

A new test kit enables visual and smartphone-based detection of glyphosate (GlyP). This method utilizes a copper(II)-pyrocatechol violet complex for selective glyphosate identification in water samples.

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Area of Science:

Environmental Chemistry
Analytical Chemistry
Sensor Development

Background:

Glyphosate (GlyP) is a widely used herbicide.
Selective and sensitive detection methods for GlyP are crucial for environmental monitoring.
Existing detection methods can be complex and require specialized equipment.

Purpose of the Study:

To develop a simple, selective, and portable test kit for glyphosate detection.
To utilize a copper(II)-pyrocatechol violet complex for GlyP sensing.
To enable both visual and instrumental quantification of GlyP in water.

Main Methods:

Screening of 96 metal ion-indicator combinations to identify a selective complex.
Incorporation of the selected copper(II)-pyrocatechol violet complex into a C18 solid support.
Development of a test kit for visual detection and smartphone-based quantification.

Main Results:

The developed test kit allows for naked-eye detection of 20 μM GlyP in tap water.
Smartphone analysis achieved a limit of detection as low as 2.66 μM (450 μg L^-1) for GlyP.
The method demonstrates proof-of-principle for selective glyphosate detection.

Conclusions:

A novel test kit for selective glyphosate detection has been successfully developed.
The kit offers a simple and accessible method for on-site GlyP monitoring.
The technology holds potential for widespread environmental and agricultural applications.