Abstract：The enriching and isolation methods of nitrogen compounds in heavy petroleum were introduced.Acid nitrogen compounds from heavy petroleum (bp:335～500 ℃) were directly isolated by column chromatograph and basic nitrogen compounds were extracted with 1 mo
周密; 林峰; 龚惠红; 朱明华. 重质石油中含氮化合物的形态及分布分析VI[J]. 南昌大学学报（工科版）, 1999, 21(03): 1-.
Zhou Mi Lin Feng Gong Huihong (Nanchang University,Nanchang 330029) Zhu Minghua (East China University of Science and Technology,Shanghai 200237). . , 1999, 21(03): 1-.
1999, Vol. 21 