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以苯乙烯,甲基丙烯醛等为原料,采用分散聚合法制备聚苯乙烯-丙烯醛。将该聚合物与氨基硫脲反应,制备聚苯乙烯-丙烯醛-氨基硫脲。以钛酸丁酯为原料合成的纳米二氧化钛,采用溶液共混法制备聚合物/纳米二氧化钛复合固相萃取填料。采用红外光谱法、扫描电镜、热重分析、X射线光电子能谱、X射线衍射分析仪对该复合材料进行了表征和分析。考察了合成的固相萃取填料对Cr,As,Cd和Pb离子的吸附性能,其吸附容量分别为15.42,11.20,16.21和16.42 mg/g。将SPE与ICP-M S联用,测定了猪肉中Cr,As,Cd和Pb含量,检出限分别为0.046,0.21,0.012和0.057μg/kg,相对标准偏差分别为3.6%,2.0%,3.2%和1.4%。
Styrene, methacrolein and other raw materials, the use of dispersion polymerization of polystyrene - acrolein. This polymer was reacted with thiosemicarbazide to prepare polystyrene-acrolein-thiosemicarbazide. Nano titanium dioxide synthesized from butyl titanate was prepared by solution blending method. The polymer / nano-titanium dioxide composite solid phase extraction packing was prepared. The composite was characterized and analyzed by infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy and X-ray diffraction analyzer. The adsorption properties of Cr, As, Cd and Pb ions were investigated. The adsorption capacities of the adsorbents were 15.42, 11.20, 16.21 and 16.42 mg / g, respectively. The contents of Cr, As, Cd and Pb in pork were determined by SPE and ICP-MS. The detection limits were 0.046,0.21,0.012 and 0.057μg / kg respectively, with relative standard deviations of 3.6% and 2.0%, respectively. 3.2% and 1.4%.