Abstract: To study the composition of reverse osmosis concentrate is of great significance to develop waste water processing technique. The organic matters were enriched by using solid phase extraction and solid phase micro-extraction respectively,and then analyzed by GC-MS. The results showed that organic matters in the reverse osmosis concentrate mainly consists of aromatic compounds. Combined with the MS spectrum database and external standard method, several kinds of organic matters are determined. The content of benzene and methyl substituted naphthalenes are higher.

Key words: reverse osmosis concentrate, analysis, COD, solid phase extraction, solid phase micro-extraction