中文摘要：

为目的：采用正交试验法,优选了茭白鞘叶木质素提取的最佳工艺条件。方法：采用乙酰溴分光光度法测定木质素含量作为考察指标,对影响木质素提取的因素进行了研究。首先,通过单因素试验研究了萃取溶剂、料液比、温度、微波功率、处理时间对脱取效果的影响,然后,利用正交试验法优化最佳提取条件。结果：正交试验结果表明最佳工艺参数为以乙醇硝酸液为萃取液,料液比1：10、微波功率600w、温度90℃下处理20min,在此试验条件下茭白鞘叶木质素一次提取率为66%。

英文摘要：

Objective：The optimal conditions for extraction of lignin from sheathing Leaf of Zizania latifolia were investigated by array design. Methods： The content of lignin was determined by the method of Acetyl bromide Spectrophotometry. The effects of extraction solvent, material/liquid ratio, extraction temperature, microwave power, extraction time on the content of lignin in extracts were investigated by one-factor-at-a-time, and the extraction conditions were optimized by orthogonal array design. Results： The optimal extraction conditions were obtained as follows： using ethanol nitric acid solution as extraction solvent, material/liquid ratio 1：10,microwave power 600 W, extraction temperature 90℃, and extraction time is 20 mins, under which the z-latifolia sheathing leaves lignin extraction rate was 66%.