摘要：本课题是以红薯为原料，以白砂糖、蜂蜜为辅料调配出一种具有保健功效的功能性饮料。试验中将清洗好的红薯进行护色再打浆分离，并对其进行酶解、过滤、离心等加工，得到澄清的红薯提取液；再加白砂糖、甜蜜素、柠檬酸和蜂蜜进行调配；最后高压灭菌得到红薯膳食纤维饮料的成品。本实验采用单因素以及正交实验的方法研究出红薯膳食纤维饮料的最佳加工工艺条件。最佳的护色方案：抗坏血酸0.3%，柠檬酸0.6%，浸泡时间15min；最佳酶解工艺方案：α-淀粉酶0.08%，酶解温度40℃，反应时间1h；研究了饮料的稳定性，添加了CMC-Na0.2%、黄原胶0.12%和海藻酸钠0.15%。综合分析结果可知，最佳的饮料配方为：原料与水配比为1:4，白砂糖4%，甜蜜素0.1%，柠檬酸0.25%，蜂蜜1%。红薯饮料的杀菌温度为121℃，处理时间10min~15min。通过酶重量法测得，该红薯饮料中可溶性膳食纤维量为8.26g/100mL。使用阿贝折光仪测得可溶性固形物为10.0%。通过蒽酮比色法可以测得总糖的含量为9.57g/100mL。

关键词 红薯；膳食纤维；保健饮料；加工工艺

Abstract：This topic is based on sweet potato as raw material, with white granulated sugar and honey as supplementary material mix out a kind of health care efficacy of functional beverage. Test will be cleaned, sweet potato beating again for color separation, and carries on the enzymolysis, filtration, centrifugation and so on processing, clear sweet potato extract; Add sugar, sweet, prepared in the citric acid and honey; Finally autoclave get sweet potato dietary fiber beverage product.This experiment adopts the method of single factor and orthogonal experiment research of sweet potato dietary fiber drink the best processing technological conditions.The best color scheme: 0.3% ascorbic acid, citric acid 0.6%, the soaking time of 15 min; The best digestion process: alpha amylase 0.08%, enzymolysis temperature 40 ℃, 1 h reaction time; The stability of the beverage were studied, added CMC - Na0.2%0.12%, xanthan gum and sodium alginate 0.15%. Comprehensive analysis result, the best formula is: raw material and the water ratio of 1:4, granulated sugar 4%, honey 0.1%, citric acid 0.25% and honey 1%. Sweet potato beverage sterilization temperature is 121 ℃, the processing time is 10 min ~ 15 min. Measured by enzyme weight method, the soluble dietary fiber content in sweet potato beverage is 8.26 g/100mL. Using abbe refractometer measurement soluble solids 10.0%. By anthrone colorimetry can be measured the content of total sugar was 9.57 g / 100 mL

Keywords  Sweet potato; Dietary fiber; Health beverage; Processing technology