玉米秆超临界醇解产物高效液相分析

采用高效液相色谱法(HPLC)对玉米秆超临界醇解产物作了初步尝试性分析.结果表明:玉米秆超临界醇解产物中可能含有大量极性强于苯酚的化合物,其中芳烃类物质以单环为主.进行HPLC紫外检测分析时最好采用双波长检测:在0～30 min采用220 nm检测,在30 min后采用210 nm检测.示差检测表明:液化产物中存在烷烃类物质.挥发除去溶剂的样品与直接进样的色谱图对比表明:液化产物在溶剂挥发过程中可能损失了一些挥发性较好的小分子物质.对生物质液化产物的HPLC分析从侧面反映了该液化方法是可行的,生物质在超临界甲醇条件下解聚得较为彻底.

Liquid chromatography analysis on the products from supercritical alcoholysis of cornstalk

The main alcoholysis products of cornstalk under supercritical conditions was analyzed primarily by liquid chromatograph(HPLC).The results showed that there were many compounds among the products,which exhibited higher polarities than phenol,and there were many monocyclic aromatic hydrocarbons in it.And dual wavelength determination was suitable with HPLC: the wave number was respectively 220 and 210 nm before and after 30 min.The differences of ultraviolet chromatograms between direct analysis and analysis after solvent volatilization showed that there were possibly some small volatile molecular substances loss in the course of solvent volatilization.The product could be analyzed by HPLC,but the intensive analysis needs more advanced and more effective analysis technics to discover the products and to study the mechanism of depolymerization of cornstalk biomass.