【摘要】 采用正交实验设计,以木质素的提取率为指标,通过对提取时间、超声功率、料液比和提取温度4个因素进行探讨,优选云南松松塔中木质素的提取工艺。优选出的最佳超声提取工艺为:提取时间40min,料液比1∶10(g/m L),超声功率200W,提取温度45℃,加入7滴浓硫酸量。验证试验表明,云南松松塔中木质素的提取率为39.83%(RSD=0.83%,n=5)。该实验优选的云南松松塔中木质素的提取工艺稳定、可行。更多还原

【Abstract】 To optimize extraction technology of Ligin from pinecone of Pinus yunnanensis.Taken the extraction rate of lignin as index,the optimal extraction conditions of lignin(including extraction time,ultrasonic power,and ratio of material-liquid,extraction temperature) were investigated with orthogonal experimental design.The optimal parameters were as follows:extraction time of 40 min,ratio of material-liquid of 1:10(g/m L),ultrasonic power for 200 W,extraction temperature of 45℃,sulfuric acid as catalyst.Verification test showed the extraction rate of lignin in ponecone of Pinus yunnanensis was 39.83%(RSD = 0.25%,n = 5).The optimal method was stable and feasible.更多还原