富硒绞股蓝功能性茶冻的研制

Development of Selenium-rich Functional Tea Jelly of Gynostemma pentaphyllum

绞股蓝是一种药食同源的草本植物,兼具较高的营养价值与药用价值。目前,绞股蓝相关产品以绞股蓝茶为主,存在味苦、浮沫多的弊端,制约了绞股蓝茶推广销售。本文以富硒超微绞股蓝茶粉为主要原料,以黄原胶、甜菊糖苷(甜味剂)、水等为辅料,以感官评分为主要指标,利用正交试验与Box-Behnken设计-响应面法筛选出最优的富硒绞股蓝功能性茶冻配方工艺,即富硒超微绞股蓝茶粉0.65 g、水1.00 L、甜菊糖苷0.10 g、黄原胶0.20 g,同时添加魔芋葡甘聚糖60 g。相较于传统绞股蓝茶,所得产品克服了绞股蓝茶味苦、浮沫多的弊端,丰富了绞股蓝茶产品形式;茶冻状态突破了传统茶冲泡形式下功能成分利用率低的限制,极大地提高了硒等功能活性物质的摄取率;以膳食纤维魔芋葡甘聚糖为成胶成分,既使产品具有细腻弹爽的口感、透明均匀的色泽,又赋予其调节肠道菌群、缓解便秘的功能特性,增强了产品的功能活性;以甜菊糖苷甜味剂代替传统茶冻中的蔗糖,更适宜控糖人群食用。该研究结果为绞股蓝基功能性产品的研制与推广提供了技术和理论借鉴。

Gynostemma pentaphyllum(Thunb.)Makino is a medicinal and food herb,and has high nutritional and medicinal value.At present,G.pentaphyllum-related products are still dominated by G.pentaphyllum tea,it has a bitter taste and a lot of froth,which restricts the promotion and sales of G.pentaphyllum tea.In this paper,selenium-rich superfine G.pentaphyllum tea powder was used as the main raw material,and xanthan gum,steviol glycoside(sweetener),water were used as auxiliary ingredients.The Box-Behnken Design-response surface method was used to screen the optimal formulation process of selenium-rich functional tea jelly of G.pentaphyllum with sensory evaluation as the main index.The optimal formulation was selenium-rich superfine G.pentaphyllum tea powder 0.65 g,water 1.00 L,steviol glycoside 0.10 g,xanthan gum 0.20 g and konjac glucomannan 60 g.Compared with traditional G.pentaphyllum tea,selenium-rich functional tea jelly of G.pentaphyllum overcame the disadvantages of bitter taste and frothiness,and enriched the form of G.pentaphyllum tea products.The tea jelly state broke through the limitations of low utilization of functional components in the traditional tea brewing form and greatly improved the extraction rate of functional active substances such as selenium.The use of konjac glucomannan(dietary fibre),as a gum-forming component,not only gave the product a fine,springy texture and a transparent even colour,but also endowed it the functional properties of regulating intestinal flora and relieving constipation,significantly enhancing the functional activity of the product.The sweetener steviol glycoside replaced the sucrose in traditional tea jellies,making it more suitable for people with sugar control.The results of this study provided a technical and theoretical reference for the development and promotion of G.pentaphyllum-based functional products.