建立了固相萃取-离子色谱(IC)/气相色谱-质谱(GC-MS)联合检测高矿化度油田水中低相对分子质量的有机酸和酚类化合物的方法.在中性pH条件下,样品经Waters Oasis HLB柱萃取后,萃取液经稀释、Ag2O沉淀和Ag-H柱处理除去大部分氯离子,再用IC测定有机酸;将萃取柱真空冷冻干燥,然后经甲基叔丁基醚/甲醇(9∶1,v/v)脱附并用无水硫酸钠除水,再用GC-MS检测酚类化合物.在优化的实验条件下,4种低相对分子质量的有机酸以及5种酚类化合物的平均加标回收率达到80%以上,相对标准偏差(RSD,n=6)为2.38% ～9.45% ,定量限均低于88.9 μg/L.该方法测定结果准确可靠,适用于氯离子含量高达150 g/L 左右水样中低相对分子质量的有机酸和酚类化合物的检测.
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