对水中苯酚、氯代酚、甲基酚和硝基酚等酚类化合物的固相萃取过程进行了研究,从不同类型固相萃取柱中选择HLB柱用于水中多种酚类化合物的提取,并对水样酸化、固相萃取上样流量和淋洗流量及洗脱溶剂等萃取条件进行了优化.试验选择二氯甲烷/乙酸乙酯混合溶液(体积比为1∶1)作为固相萃取洗脱溶剂,确定10 mL/min～ 20 mL/min和1 mL/min～3 mL/min为适用的上样流量和淋洗流量范围,实现了14种不同类型酚类化合物的同步最优萃取,提取效率为69.8％～120％.%Solid phase extraction process of the phenol, chlorinated phenol, methyl phenol, nitro phenol and other phenolic compounds were studied. HLB column was selected from the different types of solid phase extrac-tion column to use for a variety of phenolic compounds in water extraction. Test selected dichloromethane / ethyl acetate mixed solution ( volume ratio; 1:1 ) as solid phase extraction solvent, identified 10 mL/min～ 20 mL/min applicable sample flow and 1 mL/min～3 mL/min eluent flow range. Then we achieved the satisfac-tory extraction recovery of 69. 8%～120% in the synchronous determination of 14 different phenols in water,in-cluding the low boiling point of phenol, chlorinated phenols, and more difficultly extracted methyl and nitro phe-nols.
展开▼
