Gutter oil,which poses a serious threat to human health and has generated widespread attention in recent years,is misused as cooking oil,creating a major food safety concern.Capsaicin has been identified as a promisin...Gutter oil,which poses a serious threat to human health and has generated widespread attention in recent years,is misused as cooking oil,creating a major food safety concern.Capsaicin has been identified as a promising indicator for the detection of gutter oil.Hence,in this study,we introduce a novel hybrid approach for capsaicin detection that combines magnetic molecular imprinting(MMIP)with surface-enhanced Raman scattering(SERS)technology to rapidly and accurately identify gutter oil.A magnetic molecularly imprinted polymer is developed with the incorporation of purified halloysite nanotubes,which provide a large specific surface area.The resulting product,magnetic halloysite molecularly imprinted polymers(MHNTs@MIPs),serves as a specific isolation material for the enrichment of capsaicin from complex matrices.The Ag NPs@Si(silver nanoparticles deposited on a silicon wafer surface)and Au NPs(gold nanoparticles),known for their excellent signal enhancement capabilities,work synergistically as the SERS substrate.Substantially enhanced SERS peaks are observed at 1173 cm^(-1),indicating the potential of this method for capsaicin detection and gutter oil identification.A strong loglinear relationship between SERS intensity and the logarithm of capsaicin concentration is established across a wide range of 0.05–100μM,with a detection limit of 67.7 nM.Furthermore,for both simulated and real gutter oil samples,capsaicin recovery rates of 95.5%–110.3%and 96.3%–104.9% were achieved using the SERS sensor,demonstrating good consistency with certified high-performance liquid chromatography(HPLC)results.Therefore,this SERS sensor can be served as efficient method for detecting capsaicin and monitoring oil quality.展开更多
基金supported by the Agricultural Science and Technology Independent Innovation Project of Jiangsu Province(CX(23)3041)The Natural Science Foundation of Jiangsu Province(BK20241924)+1 种基金The Key Research and Development Program of Zhenjiang City(NY2023002,SH2024112)Research&Practice Innovation Program of Jiangsu Province(KYCX23_3638).
文摘Gutter oil,which poses a serious threat to human health and has generated widespread attention in recent years,is misused as cooking oil,creating a major food safety concern.Capsaicin has been identified as a promising indicator for the detection of gutter oil.Hence,in this study,we introduce a novel hybrid approach for capsaicin detection that combines magnetic molecular imprinting(MMIP)with surface-enhanced Raman scattering(SERS)technology to rapidly and accurately identify gutter oil.A magnetic molecularly imprinted polymer is developed with the incorporation of purified halloysite nanotubes,which provide a large specific surface area.The resulting product,magnetic halloysite molecularly imprinted polymers(MHNTs@MIPs),serves as a specific isolation material for the enrichment of capsaicin from complex matrices.The Ag NPs@Si(silver nanoparticles deposited on a silicon wafer surface)and Au NPs(gold nanoparticles),known for their excellent signal enhancement capabilities,work synergistically as the SERS substrate.Substantially enhanced SERS peaks are observed at 1173 cm^(-1),indicating the potential of this method for capsaicin detection and gutter oil identification.A strong loglinear relationship between SERS intensity and the logarithm of capsaicin concentration is established across a wide range of 0.05–100μM,with a detection limit of 67.7 nM.Furthermore,for both simulated and real gutter oil samples,capsaicin recovery rates of 95.5%–110.3%and 96.3%–104.9% were achieved using the SERS sensor,demonstrating good consistency with certified high-performance liquid chromatography(HPLC)results.Therefore,this SERS sensor can be served as efficient method for detecting capsaicin and monitoring oil quality.
