MSPE-GC/MS在造纸废水苯系污染物检测中的应用研究

Determination of Benzenes Pollutants in Papermaking Wastewater by MSPE-GC/MS

采用化学共沉淀法合成了磁性多壁碳纳米管材料(Fe3O4@MWSNTs),对该材料进行扫描电子显微镜、X射线衍射、红外光谱、元素分析等表征,并将其作为磁性固相萃取(MSPE)的吸附剂,建立了磁性固相萃取结合气相色谱质谱联用(MSPE-GC/MS)检测造纸废水中苯系污染物的分析方法。结果显示,Fe3O4纳米颗粒较好地附着在多壁碳纳米管的表面,材料C含量为37.45%,Fe3O4纳米颗粒的尺寸在50~200 nm左右,亲水性适中。将该材料用于造纸废水气质联用分析检测的前处理中,能够排除基质干扰并吸附痕量苯系污染物,此外,与普通液液萃取相比具有简单、快速、易于操作、有机溶剂用量少等优点。气质检测结果显示,建立的方法对痕量苯系污染物有很好的检出效果。

A multi-walled carbon nanotubes magnetic nanoparticles(Fe3O4@MWSNTs)were successfully synthesized and exploited as sorbent for extraction of benzenes pollutants.The novel nanocomposites were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD),Fourier-transform infrared spectroscopy(FT-IR),elemental analysis(EA)methods.A analysis method of combining magnetic solid-phase extraction procedure with gas chromatography-mass spectrometry(MSPE-GC/MS)was developed for determination of benzenes pollutants in paper making wastewater.The results demonstrated that Fe3O4 nanoparticles were well attached to MWCNTs,when the content of C was 37.45%,the size of Fe3O4 was between 50~200 nm,and the hydrophilic was moderate.Compared to liquid-liquid extraction,the established method had the advantages including simple,rapid,easy to operate and less organic solvent consumed for the trace analysis of the benzenes pollutants with little matrix interference and better adsorption capacity.