Molecularly imprinted electrochemical sensor for selective detection of vitamin B1 based on poly-l-arginine electroreduced graphene oxide composite film loaded with Au nanoparticles
摘要
A molecularly imprinted electrochemical sensor based on poly-l-arginine (L-Arg) electroreduced graphene oxide (rGO) was constructed for the detection of vitamin B1. The composite film with its abundant hydrophilic groups loaded with the excellent electrical conductivity of Au nanoparticles (AuNPs) provides an efficient platform for the formation of molecular-imprinted polymer films. The linear fitting curve between the current response of the sensor and the concentration of vitamin B1 was obtained by analyzing and optimizing the experimental conditions. The linear range was 10−12 to 10−7 mol/L, and the detection limit was 1.4 × 10−13 mol/L. The recovery experiment showed that the sensor could be used for the detection of VB1 in peanut samples.