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用OCMA－220监测炼油污水含油量，在样品采集，萃取方式，溶剂应用等方面进行试验分析；找出了监测结果可比性差和误差过大等问题的原因，并采取了相应的改进措施。
OCMA-220 was used to monitor the oil content of refinery wastewater, and the experimental analysis was carried out on sample collection, extraction method and solvent application. The reasons for the poor comparability and over-error of monitoring results were found, and corresponding improvement measures were taken.