酸性or碱性沥青质的提取?能不能给一些相关的文献。。。十分感激啊... 不知道怎么贴附件参考1.j chromatogr a. 2004 feb 20;1027(1-2):171-7.ion-exchange resins in the isolation of nitrogen compounds from petroleum residues.concei??o oliveira e, vaz de campos mc, sant'ana lopes a, rodrigues vale mg, bastos caram?o e.2.j chromatogr a. 2004 feb 20;1027(1-2):171-7.ion-exchange resins in the isolation of nitrogen compounds from petroleum residues.concei??o oliveira e, vaz de campos mc, sant'ana lopes a, rodrigues vale mg, bastos caram?o e,查看更多