Fabrication of Profenofos Electrochemical Sensor by Bimetal-Organic Framework MOF-808 (Zr/Ce) with Organophosphorus Hydrolase-like Activity

作者：Yang, Guang-Wei; Li, Jian-Ping^*

来源：CHINESE JOURNAL OF ANALYTICAL CHEMISTRY, 2023, 51(7): 1112-1121.

DOI：10.19756/j.issn.0253-3820.221636

• Profenofos
• Nanozyme
• MOF-808(Zr
• Ce)
• Electrochemical sensor
• Potassium ferricyanide

An electrochemical sensor for determination of profenofos (PFF) was prepared. The bimetal-organic framework (MOF-808 (Zr/Ce)) with the organophosphorus hydrolase-like activity was modified on the surface of the glassy carbon electrode. MOF-808 (Zr/Ce) catalyzed the hydrolysis of PFF to form 4-bromo-2-chlorophenol (BCP), and BCP reduced K3 [ Fe(CN)6 ] to K4[Fe(CN)6]. As the amount of PFF in the sample increased, the amount of K4[Fe(CN)6] generated increased, and the electrochemical signal gradually increased, which could realize the indirect determination of PFF. The linear range of the sensor for PFF was 0.5-50 & mu;g/L, and the detection limit was 191 ng/L (3a/K). The sensor was successfully applied to determination of PFF in water samples and soil leachate, with spiking recoveries of 95.0%-105.4% and relative standard deviations of 4.5%-8.7%.

• 单位
  桂林理工大学