Magnetic polymer Fe_(3)O_(4)@P(MMA-AA-DVB)full of carboxylate-functionalized groups was prepared via suspension polymerization method with nano Fe_(3)O_(4)as a core,methyl methacrylate(MMA)and methacrylic acid(AA)as m...Magnetic polymer Fe_(3)O_(4)@P(MMA-AA-DVB)full of carboxylate-functionalized groups was prepared via suspension polymerization method with nano Fe_(3)O_(4)as a core,methyl methacrylate(MMA)and methacrylic acid(AA)as monomers,divinylbenzene(DVB)as a crosslinker.The Fe_(3)O_(4)@P(MMA-AA-DVB)was characterized by elementary analysis(EA),powder X-ray diffraction(XRD),Fourier-transformed infrared spectrometry(FTIR),transmission electron microscopy(TEM),vibrating sample magnetometer(VSM)and thermogravimetric-differential thermal gravity(TG-DTG).The application for its adsorption and enrichment properties for parabens in aqueous solution was investigated.Furthermore,a rapid,sensitive and accurate method for the simultaneous determination of 4 kinds of parabens,i.e.,methylparaben(MPB),ethylparaben(EPB),propylparaben(PPB)and butylparaben(BPB),in water and cosmetics by magnetic solid-phase extraction(MSPE)liquid chromatography(MSPE-HPLC)was reported.The effects for MSPE,e.g.sample pH values,enrichment time,type and amount of elution solutions were investigated.The results showed that the average particle size of Fe_(3)O_(4)@P(MMA-AA-DVB)was around 20 nm,with the saturation magnetization intensity of 10.66 emu·g^(-1).The enrichment factor of the target parabens reached 250.Under the optimal condition,linearities were obtained ranging from 2-2000μg·L^(-1)with correlation coefficients(R)higher than 0.9998 for the target parabens.The average recoveries were at 93.6%-101.2%with the relative standard deviations(RSDs)in the range of 0.8%-8.5%.The limits of detection(LODs)were in the range of 0.22-1.60 ng·L^(-1)and the limits of quantification(LOQs)were between 0.8 ng·L^(-1)and 5.0 ng·L^(-1).The developed method can be applied to the routine analyses for the determination of the parabens in water and cosmetics samples.The present method has been applied in the determination of the parabens in 15 real samples.The result showed that 13 of them were found to contain MPB or PPB at concentration of1.26-347.8μg·kg^(-1)for MPB and 44.89-224.8μg·kg^(-1)for PPB,respectively.展开更多
文摘Magnetic polymer Fe_(3)O_(4)@P(MMA-AA-DVB)full of carboxylate-functionalized groups was prepared via suspension polymerization method with nano Fe_(3)O_(4)as a core,methyl methacrylate(MMA)and methacrylic acid(AA)as monomers,divinylbenzene(DVB)as a crosslinker.The Fe_(3)O_(4)@P(MMA-AA-DVB)was characterized by elementary analysis(EA),powder X-ray diffraction(XRD),Fourier-transformed infrared spectrometry(FTIR),transmission electron microscopy(TEM),vibrating sample magnetometer(VSM)and thermogravimetric-differential thermal gravity(TG-DTG).The application for its adsorption and enrichment properties for parabens in aqueous solution was investigated.Furthermore,a rapid,sensitive and accurate method for the simultaneous determination of 4 kinds of parabens,i.e.,methylparaben(MPB),ethylparaben(EPB),propylparaben(PPB)and butylparaben(BPB),in water and cosmetics by magnetic solid-phase extraction(MSPE)liquid chromatography(MSPE-HPLC)was reported.The effects for MSPE,e.g.sample pH values,enrichment time,type and amount of elution solutions were investigated.The results showed that the average particle size of Fe_(3)O_(4)@P(MMA-AA-DVB)was around 20 nm,with the saturation magnetization intensity of 10.66 emu·g^(-1).The enrichment factor of the target parabens reached 250.Under the optimal condition,linearities were obtained ranging from 2-2000μg·L^(-1)with correlation coefficients(R)higher than 0.9998 for the target parabens.The average recoveries were at 93.6%-101.2%with the relative standard deviations(RSDs)in the range of 0.8%-8.5%.The limits of detection(LODs)were in the range of 0.22-1.60 ng·L^(-1)and the limits of quantification(LOQs)were between 0.8 ng·L^(-1)and 5.0 ng·L^(-1).The developed method can be applied to the routine analyses for the determination of the parabens in water and cosmetics samples.The present method has been applied in the determination of the parabens in 15 real samples.The result showed that 13 of them were found to contain MPB or PPB at concentration of1.26-347.8μg·kg^(-1)for MPB and 44.89-224.8μg·kg^(-1)for PPB,respectively.
