The composite mesoporous materials C2H5-MCM-41 are synthesized by multistep method,and its structure is characerized and evaluated.A solid-phase microextraction(SPME) method coupled to HPLC is proposed for the determi...The composite mesoporous materials C2H5-MCM-41 are synthesized by multistep method,and its structure is characerized and evaluated.A solid-phase microextraction(SPME) method coupled to HPLC is proposed for the determination of trace pyrene with C2H5-MCM-41 mesporous materials as the coating of extractor.Extraction time,extraction temperation,stirring rate,ionic strength,and desorption time had been optimized.The liner range is 0.15～150μg·L-1,detection limit is 0.062μg.L-1(S/N=3),whereas the RSD(n=5) range is 0.035%,which suggests that the sample pretreatment method of SPME is fast,convenient,recise,sensitive and solvent-free.展开更多
文摘The composite mesoporous materials C2H5-MCM-41 are synthesized by multistep method,and its structure is characerized and evaluated.A solid-phase microextraction(SPME) method coupled to HPLC is proposed for the determination of trace pyrene with C2H5-MCM-41 mesporous materials as the coating of extractor.Extraction time,extraction temperation,stirring rate,ionic strength,and desorption time had been optimized.The liner range is 0.15～150μg·L-1,detection limit is 0.062μg.L-1(S/N=3),whereas the RSD(n=5) range is 0.035%,which suggests that the sample pretreatment method of SPME is fast,convenient,recise,sensitive and solvent-free.
