神木半焦粉末萃取物的组成特征

依次用石油醚、CS₂、CH₂Cl₂、丙酮和甲醇在索氏萃取器中萃取了神木半焦粉末,得到了五级萃取物(E_1-5)和最终的萃余物,总萃取率为1.76%。分别用气相色谱/质谱联用仪(GC/MS)、大气压固体探针/飞行时间质谱仪(ASAP/TOF-MS)和电喷雾电离/飞行时间质谱仪(ESI/TOF-MS)分析了各级萃取物。用GC/MS分析的结果表明,在E₁中C_15-24的直链烷烃和E₂中3与4环的芳烃比较丰富,在E_3-5中含杂原子有机化合物较丰富,特别是E₄和E₅中含氧有机化合物的含量最高。与用GC/MS分析的结果相比,用ASAP/TOF-MS和ESI/TOF-MS从E_3-5中检测出更多的含杂原子有机化合物。

Compositional features of extracts from Shenmu char powder

Shenmu char powder (SCP) was sequentially extracted with petroleum ether, carbon disulfide, dichloromethane, acetone, and methanol in a Soxhlet extractor to obtain extracts 1-5 (E_1-5) and final residue. The total extract yield of SCP is 1.76%. All the extracts were characterized with gas chromatograph/mass spectrometer (GC/MS), atmospheric solid analysis probe/time-of-flight mass spectrometer (ASAP/TOF-MS), and electrospray ionization/time-of-flight mass spectrometer (ESI/TOF-MS). Normal alkanes with C₁₅ to C₂₄ and arenes with 3 and 4 rings are predominant in E₁ and E₂, respectively, while more heteroatom-containing organic species were identified in E_3-5. Organooxygen compounds are the most abundant in E₄ and E₅ based on analysis with GC/MS. Much more heteroatom-containing organic compounds were detected in E_3-5 with ASAP/TOF-MS and ESI/TOF-MS than with GC/MS.