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  • On-spot quantitative analysis of dicamba in field waters using a lateral flow immunochromatographic strip with smartphone imaging.

On-spot quantitative analysis of dicamba in field waters using a lateral flow immunochromatographic strip with smartphone imaging.

Analytical and bioanalytical chemistry (2020-08-02)
Meng Qi, Jingqian Huo, Zhenfeng Li, Cong He, Dongyang Li, Yuxin Wang, Natalia Vasylieva, Jinlin Zhang, Bruce D Hammock
ABSTRACT

Dicamba herbicide is increasingly used in the world, in particular' with the widespread cultivation of genetically modified dicamba-resistant crops. However, the drift problem in the field has caused phytotoxicity against naive, sensitive crops, raising legal concerns. Thus, it is particularly timely to develop a method that can be used for on-the-spot rapid detection of dicamba in the field. In this paper, a lateral flow immunochromatographic strip (LFIC) was developed. The quantitative detection can be conducted by an app on a smartphone, named "Color Snap." The tool reported here provides results in 10 min and can detect dicamba in water with a LOD (detection limit) value of 0.1 mg/L. The developed LFIC shows excellent stability and sensitivity appropriate for field analysis. Our sensor is portable and excellent tool for on-site detection with smartphone imaging for better accuracy and precision of the results. Graphical abstract.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
2,3,5-Trichlorobenzoic acid, 97%
Supelco
Clopyralid, PESTANAL®, analytical standard