WANG De-xiang,DUAN Yu,KONG Da-bin,et al.Detection of 4-Iodophenoxyacetic Acid Using a Graphene-loaded Tin Dioxide Electrochemical Sensor[J].Journal of Instrumental Analysis,2023,42(06):729-735.
WANG De-xiang,DUAN Yu,KONG Da-bin,et al.Detection of 4-Iodophenoxyacetic Acid Using a Graphene-loaded Tin Dioxide Electrochemical Sensor[J].Journal of Instrumental Analysis,2023,42(06):729-735. DOI: 10.19969/j.fxcsxb.22122502.
Detection of 4-Iodophenoxyacetic Acid Using a Graphene-loaded Tin Dioxide Electrochemical Sensor
A graphene-loaded tin dioxide electrochemical sensor for the electrochemical detection of exogenous plant hormone 4-iodophenoxyacetic acid(4-IPOAA) was fabricated in this paper.The graphene-loaded tin dioxide was constructed by synthesizing coral-like tin dioxide nanoparticles using hydrothermal method and homogeneously immobilizing them on graphene.The results showed that there was a good linearity for 4-IPOAA in the range of 0.5-20 µmol/L and 20-100 µmol/L by square wave voltammetry,and the limit of detection(LOD,,S,/,N ,= 3) was 9.86 × 10,-2, µmol/L.The electrochemical oxidation process of 4-IPOAA was controlled by mixing with the participation of 2 electrons.The prepared sensors showed good reproducibility with relative standard deviations(RSDs) not more than 3.8%.The spiked recoveries were in the range of 91.3%-106% and 91.4%-116% for 4-IPOAA in cabbage and cucumber,with RSDs of 1.1%-5.2% and 3.8%-8.0%,respectively,which indicated that the the sensor has a promising application prospect in the practical analysis of 4-IPOAA.
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