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All-solid-state potentiometric salicylic acid sensor for in-situ measurement of plant

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Abstract

Using PEDOT as the conductive polymer, an innovative small-scale sensor for directly measuring salicylate ions in plants was developed, which avoided the complicated sample pretreatment of traditional analytical methods and realized the rapid detection of salicylic acid. The results demonstrate that this all-solid-state potentiometric salicylic acid sensor is easy to miniaturize, has a longer lifetime (≥1 month), is more robust, and can be directly used for the detection of salicylate ions in real samples without any additional pretreatment. The developed sensor has a good Nernst slope (63.6 ± 0.7 mV/decade), the linear range is 10−2 ~ 10−6 M, and the detection limit can reach (2.8 × 10−7 M). The selectivity, reproducibility, and stability of the sensor were evaluated. The sensor can perform stable, sensitive, and accurate in situ measurement of salicylic acid in plants, and it is an excellent tool for determining salicylic acid ions in plants in vivo.

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Funding

This work was supported by National Key Research and Development Program of China (No.2022YFD2002301). The project was supported by the National Natural Science Foundation of China (Grant No. 61571443).

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Authors and Affiliations

  1. College of Information and Electrical Engineering, China Agricultural University, Beijing, China

    Cheng-Xiao Fan, Jie-Peng Yao, Jing-Jing Liu, Nan Wang, Lan Huang & Zhong-Yi Wang

  2. School of Mechanical Engineering, Ningxia University, Yinchuan, China

    Jin-Hai Li

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  1. Cheng-Xiao Fan
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Fan, CX., Li, JH., Yao, JP. et al. All-solid-state potentiometric salicylic acid sensor for in-situ measurement of plant. Anal Bioanal Chem 415, 1979–1989 (2023). https://doi.org/10.1007/s00216-023-04616-8

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