利用超顺磁化的MIL-53(Al)材料磁固相萃取检测环境水体中多溴联苯醚的应用研究

Extraction of Polybrominated Diphenyl Ethers in Environmental Water by Superparamagnetic MIL-53( Al) for Magnetic Solid-phase

将吸附性能和稳定性良好的MIL-53（A1）材料与包覆有Si02的超顺磁性材料通过超声结合，利用带有磁性的金属有机骨架材料做磁固相萃取，萃取后通过解析、浓缩并联用CC—MS／MS分析水样中的多溴联苯醚。最低检出限在0．98～8．65ng／L，定量限在2．94～28．54ng／L，并得到较好的线性相关系数尺2（0．980～0．999），日间和日内的相对标准偏差分别为3．23％～7．80％和5．30％～14．15％。说明该种检测方法是可行的。

Magnetic solid -phase extraction （MSPE）, which is based on the extraction of target analysis on themagnetized sorbents, is a relative new mode of solid phase extraction （SPE）. MSPE with Fe3 04@ SiO2/MIL -53（A1） nanocomposite as sorbent was used to extract polybrominateddiphenyl ethers （PBDEs） from water sam-ples. The MSPE process involved the dispersion of the Fe304 @ SiO2 and MIL -53 （A1） nanoparticles in watersamples with sonication, followed by magnetic aided retrieval of the sorbent, then solvent desorption of extractedPBDEs for GC - MS/MS analysis. Under the optimized conditions, the method showed good linearity in the range of5- 2000 ng/L, low limits of detection （0. 98 -8.65 ng/L）, and good repeatability of the extractions （relativestandard deviation, 〈 15%, n = 5）. MSPE using water stable MOF materials as sorbent was demonstrated to be afast, simple and effective pretreatment method for the determination of PBDEs from environmental water samples.