Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (12): 20230390.doi: 10.7503/cjcu20230390

• Analytical Chemistry • Previous Articles    

Electrochemical Sensor for Ammonium Nitrogen in Soil Based on Platinum Modified Screen-printed Electrodes

CHEN Shan1, CHEN Jinhu2, XU Guohailin3, LIU Jun1, Qian Mingyan1, CHEN Jingwen1(), FANG Yimin2   

  1. 1.Institute of Agricultural Facilities and Equipment,Jiangsu Academy of Agricultural Sciences,Jiangsu Engineering Technology Research Center of Biomass Composites and Addictive Manufacturing,Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of the Yangtze River,Ministry of Agriculture and Rural Affairs,Nanjing 210014,China
    2.School of Pharmacy,Nanjing Medical University,Nanjing 211166,China
    3.Jiangsu University,School of Agricultural Engineering,Zhenjiang 212013
  • Received:2023-09-01 Online:2023-12-10 Published:2023-10-20
  • Contact: CHEN Jingwen E-mail:chenjingwen@jaas.ac.cn
  • Supported by:
    the Jiangsu Agricultural Science and Technology Innovation Fund, China(No.CX(21)3064)

Abstract:

Rapid detection of ammonium nitrogen(NH4+) in soil is quit important for precise agriculture as it can significantly increase the utilization of soil fertility and reduce the environmental pollution. Compared with the traditional detection methods for NH4+ which are time-consuming and expensive, here we developed a rapid and sensitive electrochemical sensor by platinum deposited screen printed electrodes(Pt-SPEs) as sensing components. Owing to the specific catalysis to NH4+, using the carbonate to precipitate the metal ions, coupling with the ammonium extraction syringe, NH4+ in soil can be detected in 5 min for the first time, with a detection range of 0.1—5 mmol/L(R2=0.997)and a detection limit of 13 μmol/L(S/N=3). This sensors can be applied for on-site detection of NH4+ in soil due to its rapidity, simplicity, high selectivity and stability without large equipment, providing an important data support for precise agriculture.

Key words: Soil, Ammonium nitrogen, Electrochemistry, Screen printed electrode

CLC Number: 

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