剑麻渣果胶提取与测定

从剑麻的麻渣、纤维中提取果胶，测定果胶的含量、纯度和酯化度。将湿麻渣在密封与敞开空气中自然发酵后提取果胶，探讨湿麻渣在发酵后对果胶品质的影响。结果表明，果胶得率最高的是湿麻渣（13．342％），最低的是直纤维（0．450％），干麻渣的果胶得率（1．662％）略高于湿纤维（1．326％）与乱纤维（1．264％）的；果胶纯度最高的是直纤维（73．360％），最低的是干麻渣（32．567％）。直纤维果胶的酯化度（45．452％）略大于麻渣和乱纤维的（32％～35％）；湿麻渣经过自然发酵后，果胶得率与纯度均降低，但湿麻渣完全发酵后的果胶酯化度（33．432％）接近于干麻渣的（33．156％）。

Extraction and Determination of Pectin from Sisal Residue

To extract pectin from sisal residue and fiber, the content, purity and esterification de- gree of pectin were determined. Pectin was extracted from fresh sisal residue after fermentation in the air- proof and ample air, and the effects on the quality of pectin were investigated. The results showed that fresh sisal residue yields the most pectin （ 13.342% ）, and the fiber yields the least （0. 450% ） . The yield of pectin extracted from dry sisal residue （ 1. 662% ） was higher than these extracted from wet kinky fiber （ 1. 326% ） and dry kinky fiber （ 1. 264% ） slightly. The highest purity of pectin was from fiber （73.360%）, and the lowest was from dry sisal residue （32. 567% ） . The esterification degree of pec- tin extracted from fiber （45.452%） was higher than these of dry sisal residue and the kinky fiber （32% ~ 35 % ） . The yield and purity of pectin decreased while the fresh sisal residue was fermented in nature condition. But the result of esterification degree of pectin extracted from sisal residue （33. 432% ） fer- mented completely was close to the one of dry sisal residue （33. 156% ） .