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摘要
Molecularly imprinted polymer (MIP) was synthesized by precipitation polymerization using ribavirin as the template molecule and methacrylic acid as the functional monomer. The sensitive film of ribavirin electrode was constructed by molecularly imprinted polymer doped with graphene oxide as the ionophore, poly(vinylchloride) (PVC) as matrix and dioctyl sebacate for plasticizer. The results showed that the best performance of the electrode was obtained when the sensitive film compositions were 100. 8 mg of MIP, 14. 7 mg of GO, 450. 8 mg of PVC and 901. 6 mg of dioctyl sebacate, and the inner filling solution composition was 0. 1 mol/L NaCl + 0. 05 mol/L NaAc-0. 05 mol/L HAc + 1. 0x10(-5) mol/L ribavirin solution. The electrode showed a near-Nernstian slope of 45. 565 mV/decade for ribavirin over the range of 1. 0x10(6) - 1. 0x10(-4) mol/L and a detection limit of 1. 0x10(-7) mol/L. The electrode could be used in the pH range of 3 to 5 with response time of less than 3 min. The developed electrode exhibited high selectivity for ribavirin and was successfully applied to the determination of ribavirin in feed and injection with recoveries of 90%-110% and RSD of 3. 0%-7. 9%.
- 出版日期2017-7
- 单位广东食品药品职业学院; 肇庆学院
