柑橘果胶和纤维连续提取工艺研究及其理化检测

Continuous Extraction Technology and Detection of Physical-Chemical Indexes of Citrus Pectin and Fiber

为了充分开发柑橘加工废弃资源的价值,同时更加准确地描述所得纤维的应用性质,采用柑橘果胶和纤维连续提取工艺,并利用质构分析仪对所得纤维的应用性质进行检测。通过单因素实验和正交实验探究果胶提取pH值、纤维提取pH值、H_(2)O_(2)体积比、CMC百分比对果胶、纤维提取率、纤维色泽和质构的影响,确定连续提取应用性能良好的果胶和纤维的最佳条件。结果显示,在果胶提取pH2.0、纤维提取pH8.5、H_(2)O_(2)体积比1.0%、CMC百分比10%的条件下,所得果胶得率为23.54%、纤维得率为31.57%,其中,果胶酯化度为69.57%,黏度31.50 cp,应用性质较好;纤维质构特性与市场其他产品相比,黏度、黏力、硬度、坚实度均较高,应用性质良好。研究结果为连续提取柑橘果胶和纤维的工艺条件及纤维的理化检测提供了技术依据。

In order to fully exploit the value of citrus processing waste resources and describe the application properties of the obtained fiber more accurately at the same time,the continuous extraction process was adopted to get citrus pectin and fiber,and the application properties of the obtained fiber were detected by texture analyzer.Single factor and orthogonal experiments were conducted to study the effects of pectin extraction pH,fiber extraction pH,H2O2 volume ratio,CMC percentage on pectin and fiber extraction ratio,fiber color and texture,and to determine the optimal conditions for continuous extraction of pectin and fiber with good application performance.Results showed that under the pectin extraction pH2.0,fiber extraction pH8.5,H2O2 volume ratio 1.0%,CMC percentage of 10%,pectin yield was got 23.54%,fiber yield was got 31.57%.Among them,the pectin esterification degree was 69.57% with the viscosity of 31.50 cp of pectin,and compared with others in the market,the fiber product had better fiber quality and structure characteristics,such as higher viscosity,stronger viscous force,higher hardness and strengther,in a word it has good application properties.This experiment provided a technical basis for the technological conditions of continuous extraction of citrus pectin and fiber and the physical-chemical detection of fiber.