The composition of coal-derived light oil (IBP-220 ℃) was separated into 5 fractions by atmospheric distillation and an......

通过对甲基二乙醇胺脱硫剂样品的蒸馏浓缩预分离，得到样品的预浓缩液。然后利用制备液相色谱技术在反相Ｃ１８液相色谱柱上对样品预浓缩液......