Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (6): 20240106.doi: 10.7503/cjcu20240106

• Analytical Chemistry • Previous Articles     Next Articles

Detection of Perfluorooctane Sulfonate in Aqueous Environment Based on Molecular Imprinting Coupled Bipolar Electrochemiluminescence Sensor

HUANG Shengxiu, LIU Liyang, YANG Weiqiang, WANG Qingxiang, NI Jiancong()   

  1. School of Chemistry and Chemical Engineering,Environment and Minnan Normal University,Zhangzhou 363000,China
  • Received:2024-03-05 Online:2024-06-10 Published:2024-04-17
  • Contact: NI Jiancong E-mail:nijiancong@foxmail.com
  • Supported by:
    the National Natural Science Foundation of China(22376089);the Fujian Provincial Natural Foundation, China(2021J01991)

Abstract:

Combining the specific recognition ability of molecular imprinting polymer(MIP) and the high sensitivity and anti-interference characteristics of bipolar electrochemical luminescence sensing(BPECL), an MIP/BPECL sensor was constructed for the detection of perfluorooctane sulfonate(PFOS) in sewage. Using PFOS as the template molecule and o-phenylenediamine(o-PD) as the functional monomer, the molecular-imprinted polymer was specifically identified by negative extreme electropolymerization of bipolar electrodes. The electrodes were characterized by means of scanning electron microscopy(SEM) and cyclic voltammetry(CV). The MIP/BPECL sensing system was constructed with ruthenium bipyridine/tri-n-propylamine[Ru(bpy)32+/TPrA] as the output signal at the positive extremity of the bipolar electrode. Under optimized conditions, the electrochemical sensor displayed a wide linear range from 1 nmol/L to 1000 nmol/L with a low limit of detection of 0.43 nmol/L(S/N=3). The sensor is applied to the actual sample of the environmental water labeling recovery test, and the result is good. The constructed MIP/BPECL sensor has the advantages of high sensitivity, good specificity and strong anti-interference ability. By changing the template molecule of molecular imprinting, it is expected to realize the application of this sensor in the detection of other environmental pollutants.

Key words: Perfluorooctane sulfonate, Molecular imprinting, Bipolar electrode, Electrochemiluminescence

CLC Number: 

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