Abstract: GC/MS Analysis of Organic Constituents in Refinery Waste WaterTang Shouyin; Jin Yizhong;Dai Youzhi; Tan Tianen (Department of Chemical Engineering,Zhejiang University, Hangzhou 310027, China)Abstract:The extraction of organic constituents in four kinds of refinery waste water with CH2Cl2 was conducted in alkalic and acidic conditions, respectively. Then these extract phases concentrated were analyzed with GC/MS method. The results show that main organic compounds are phenols which occupy 97. 53%, 92. 95% and 90. 94% in delayed coking, catalytic cracking, and air & decompression distillation process waste water, respectively ; while paraffins take 91. 65% in hydrogenation process waste water.Keywords: refinery waste water, organic constituents, GC/MS analysis