Room temperature pretreatment of pubescens by soaking in MgCl₂ aqueous solution with different concentrations was studied. The solid residues were analyzed by Van Soest chemical titration, XRD, FT-IR, and XPS, while the filtrates were analyzed by GPC, HPLC, ESI-MS, and 2D HSQC. The soaking by 20 wt% MgCl₂ solution resulted in relatively higher conversion rates of both hemicellulose (8.3 wt%) and lignin (5.3 wt%). Trace amounts of glucose and xylose were obtained in the filtrates, and the amounts were hardly varied by the addition of MgCl₂. However, compared with the filtrate from the sample pretreated by water, different oligomers were detected in the filtrates, indicating that MgCl₂ might be able to change the mechanism of dissolution conversion of pubescens, meanwhile, no LCC was found, indicating that MgCl₂ pretreatment could promote the breakage of ether linkage between carbohydrate part and lignin part in LCCs. A new monophenol (LIG9) might be obtained from LIG1, which might be attributed to the promoted breakage of β-O-4 in lignin by MgCl₂ pretreatment. Compared with the sample pretreated by pure water, GPC analysis revealed that the proportion of larger compounds (M_n > 1700 Da) decreased while those of smaller compounds (M_n = 180-300, 300-800, and 800–1700 Da) all rose.

研究了通过浸泡在不同浓度的MgCl ₂水溶液中对室温下的毛刺进行室温预处理。固体残留物通过Van Soest化学滴定，XRD，FT-IR和XPS分析，而滤液通过GPC，HPLC，ESI-MS和2D HSQC分析。用20wt％的MgCl ₂溶液浸泡 导致半纤维素（8.3wt ％）和木质素（5.3wt  ％）的相对较高的转化率 。在滤液中获得痕量的葡萄糖和木糖，并且通过添加MgCl ₂几乎没有改变这些量。但是，与用水预处理的样品中的滤液相比，在滤液中检测到了不同的低聚物，表明MgCl₂可能能够改变毛刺的溶出转化机制，但未发现LCC，表明MgCl ₂预处理可促进LCC中碳水化合物部分和木质素部分之间的醚键断裂。可以从LIG1中获得一种新的单酚（LIG9），这可能归因于MgCl ₂预处理促进了木质素中β-O-4的断裂。与由纯水预处理的样品相比，GPC分析显示，较大的化合物的比例（M _Ñ  > 1700道尔顿）下降，而那些较小的化合物的（M _Ñ  = 180-300，300-800，和800-1700道尔顿）的所有玫瑰。