Polyethyleneimine-functionalized Silver Nanoparticles as SERS Substrates for the Detection of Chrysoidine

In this study, a mixture of silver nanoparticles (AgNPs) and polyethyleneimine (PEI) was used as the SERS substrate at room temperature for the rapid and sensitive detection of Chrysoidine in mirinda soft drink, and PEI could attract Chrysoidine to the hot spot region of the AgNPs and enhance its Raman signal. The characteristic peak of the SERS spectrum of Chrysoidine showed obvious SERS enhancement at 1180  cm− 1, and there was a good linear relationship between the SERS intensity and the concentration of Chrysoidine. The limits of detection (LOD) in both water and mirinda soft drink were determined to be 1.32  µg/L and 5.11 µg/L, respectively. In addition, the average recoveries ranged from 95.65 to 102.08% with the RSDs of 3.41-5.02%. The method can be successfully used for the rapid and sensitive detection of Chrysoidine in mirinda soft drink, which provides a new idea for the detection of Chrysoid ine in other different samples.
Source: Plasmonics - Category: Biomedical Science Source Type: research