In this work,the nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite was prepared by one-step solvothermal method.The as-prepared composite was characterized by scanning electron microscopy,Brunner-Emmet-Teller measurement,ener...In this work,the nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite was prepared by one-step solvothermal method.The as-prepared composite was characterized by scanning electron microscopy,Brunner-Emmet-Teller measurement,energy dispersive spectrometer,X-ray diffraction,and Fourier transform infrared spectroscopy.By using nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite as sorbent,a dispersive solid-phase extraction coupled with high-performance liquid chromatography was developed to sensitive analysis of food colorants including tartrazine,amaranth,carmine,sunset yellow,allura red and bright blue.The experiment parameters including the amount of sorbent,adsorption time,the p H of adsorption solution,desorption time,desorption solvent,the p H of desorption solution as well as the proportion between desorption solvent and buffer solvent were investigated.Under the optimized conditions,the limits of detection(S/N=3) and limits of quantitation (S/N=10) were determined in the ranges of 0.08-0.8 and 0.2-2.0 ng/m L,respectively.With the developed sample pretreatment method,carmine and brilliant blue were determined from blueberry juice by HPLC-DAD.The contents were calculated as 1.53μg/m L and0.17μg/mL,respectively.展开更多
In view of widespread existence and toxicity,removal and detection of bisphenols is imperative to asses environmental risks and reduce harm to human health.Although many techniques have been reported constructing fast...In view of widespread existence and toxicity,removal and detection of bisphenols is imperative to asses environmental risks and reduce harm to human health.Although many techniques have been reported constructing fast and sensitive method remains a challenge.Herein,porous poly(divinylbenzene)polyme was synthesized in-situ on the Fe_(3)O_(4)particles by means of distillation-precipitation polymerization and functioned as sorbents to extract bisphenols.Employing Fe_(3)O_(4)@poly(divinylbenzene)as sorbent,a mag netic solid-phase extraction coupling with liquid chromatography was developed to detect trace bisphe nols in water.This method presented low detection limits(0.01–0.03 ng/m L),high enrichment ability(en richment factor,327–343),and good reproducibility.Moreover,the method showed satisfactory recoverie in the detection of lake water(80.60%-116.2%)and egg sample(75.17%-120.0%).Impressively,Fe_(3)O_(4)@PDVB has excellent adsorption capacity,which can realize rapid kinetic adsorption of bisphenols with equi librium time all less than 10 s.The maximum adsorption capacities reached 1074.8,1049.7,1299.1 and 1329.5 mg/g for bisphenol F,bisphenol A,bisphenol B and bisphenol AF with Langmuir isotherm model The adsorption mechanism of Fe_(3)O_(4)@PDVB to bisphenols was investigated and demonstrated that hy drophobic interactions played a key role,together with assistance ofπ-πstacking interactions and hy drogen interactions.Overall,this work provides a promising sorbent material with ultra-fast and large adsorption capacities for extraction of bisphenols from water.展开更多
基金sponsored by the National Nature Science Foundation of China (No.22076038)Natural Science Foundation of Henan (No.202300410044)。
文摘In this work,the nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite was prepared by one-step solvothermal method.The as-prepared composite was characterized by scanning electron microscopy,Brunner-Emmet-Teller measurement,energy dispersive spectrometer,X-ray diffraction,and Fourier transform infrared spectroscopy.By using nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite as sorbent,a dispersive solid-phase extraction coupled with high-performance liquid chromatography was developed to sensitive analysis of food colorants including tartrazine,amaranth,carmine,sunset yellow,allura red and bright blue.The experiment parameters including the amount of sorbent,adsorption time,the p H of adsorption solution,desorption time,desorption solvent,the p H of desorption solution as well as the proportion between desorption solvent and buffer solvent were investigated.Under the optimized conditions,the limits of detection(S/N=3) and limits of quantitation (S/N=10) were determined in the ranges of 0.08-0.8 and 0.2-2.0 ng/m L,respectively.With the developed sample pretreatment method,carmine and brilliant blue were determined from blueberry juice by HPLC-DAD.The contents were calculated as 1.53μg/m L and0.17μg/mL,respectively.
基金sponsored by the National Natural Science Foundation of China(Nos.22076038 and 22376053)Henan key scientific research programs to Universities and Colleges(No.22ZX003)。
文摘In view of widespread existence and toxicity,removal and detection of bisphenols is imperative to asses environmental risks and reduce harm to human health.Although many techniques have been reported constructing fast and sensitive method remains a challenge.Herein,porous poly(divinylbenzene)polyme was synthesized in-situ on the Fe_(3)O_(4)particles by means of distillation-precipitation polymerization and functioned as sorbents to extract bisphenols.Employing Fe_(3)O_(4)@poly(divinylbenzene)as sorbent,a mag netic solid-phase extraction coupling with liquid chromatography was developed to detect trace bisphe nols in water.This method presented low detection limits(0.01–0.03 ng/m L),high enrichment ability(en richment factor,327–343),and good reproducibility.Moreover,the method showed satisfactory recoverie in the detection of lake water(80.60%-116.2%)and egg sample(75.17%-120.0%).Impressively,Fe_(3)O_(4)@PDVB has excellent adsorption capacity,which can realize rapid kinetic adsorption of bisphenols with equi librium time all less than 10 s.The maximum adsorption capacities reached 1074.8,1049.7,1299.1 and 1329.5 mg/g for bisphenol F,bisphenol A,bisphenol B and bisphenol AF with Langmuir isotherm model The adsorption mechanism of Fe_(3)O_(4)@PDVB to bisphenols was investigated and demonstrated that hy drophobic interactions played a key role,together with assistance ofπ-πstacking interactions and hy drogen interactions.Overall,this work provides a promising sorbent material with ultra-fast and large adsorption capacities for extraction of bisphenols from water.
