Comparative study on the determination of petroleum oil in drainage by gravimetric method and infrared photometric method were engaged because of data differences dispute.

• 针对锦州市环保监测站分析锦州石化公司外排水中石油类物质采用重量法,而公司环保监测站采用红外光度法引起的数据差异争端,对两种分析方法进行了对比。