材料期刊网

以四甲基乙二胺和1，3-二溴丙烷为原料，合成了聚电解质阳离子功能基———2，3-聚季铵盐功能基。以聚苯乙烯为种子，通过种子溶胀法制备了多孔型聚（苯乙烯-二乙烯基苯）微球（ PS-DVB），并对其进行磺化。以附聚的方式在磺化的 PS-DVB微球上附聚2，3-聚季铵盐功能基，得到附聚型离子交换固定相，通过匀浆法装入色谱柱，并将其用于 SO2-4的分离分析。SO2-4能与其他常见的6种阴离子在8 min 内完成分离，实现 SO2-4的快速测定。其中， SO2-4的线性范围为0.5～50 mg／L，线性相关系数 r为0.9992；加标回收率在99.2％～101.8％之间；峰面积和保留时间的相对标准偏差分别为2.4％和3.1％；根据信噪比（ S／N＝3）计算出检出限为0.04 mg／L。结果表明该自制色谱柱适用于复杂基质中 SO2-4的快速测定。

The poly-electrolyte cation functional group of 2,3-ionene was synthesized with tet-ramethyl ethylenediamine and 1,3-dibromopropane as the raw materials. Multiporous polysty-rene-divinylbenzene microsphere particles( PS-DVB)were produced by swelling method with polystyrene as seeds and sulfonated. Then the 2,3-ionene was bonded on the sulfonated multi-porous polystyrene-divinylbenzene microsphere particles by agglomeration to get the agglomera-tive ion-exchange stationary phase. After optimizing the synthetic conditions, the new stationary phase was characterized by the techniques including scanning electron microscopy ( SEM),Fourier transform infrared spectroscopy( FTIR)and elemental analysis. The chroma-tographic column was packed by slurry method and applied in the analysis of SO 2-4 with a con-ductivity detector. SO 2-4 and other six common anions including F-,Cl-,NO-2 ,Br-,NO-3 ,PO 3-4 , were separated and analyzed rapidly on the self-regulating chromatographic column within 8 min. The linear range was from 0. 5 to 50 mg/L with correlation coefficient( r)of 0. 999 2. The LOD was 0. 04 mg/L with S/N of 3. The relative standard deviations( RSDs,n=6)were 2. 4%and 3. 1% for the peak area and retention time,respectively. The recoveries were between 99. 2% and 101. 8%. The retention times of SO 2-4 did not change significantly after long time use of the self-regulating chromatographic column. The self-regulating chromatographic column is suitable for the detection of SO2-4 in complex matrix samples.