Development Of Tropical Fruit Milk Coffee

Coffee is one of the three major beverages of the world, it keeps people energetic,wake up, has the function of diuresis and spleen etc. Pineapple, mango, banana are the main tropical fruits of Hainan,they contain rich vitamin ingredient. This paper mainly studied the baking process of hainan arabica coffee beans, the technology of preparing superfine coffee powder and the processing eligibility of superfine coffee powder,and developed a series of drinks with superfine coffee powder, tropical fruit powder and milk powder as the main materials.The main content of this paper are as follows:(1)The raw coffee beans were baked at different temperatures for different times to obtain the best baking process:the best baking temperatures for coffee beans is 150 ? and the appropriate time is 6 min.(2)Ordinary coffee powder and superfine powder were compared from the aspects of particle characteristics and processing adaptability:compared with the ordinary coffee powder, the size of superfine coffee powder particle is smaller, its specific surface area is bigger, the greater the particle size is more well-distributed.The infrared spectrum of ordinary coffee powder and superfine powder is similar to each other.The main functional groups of components of them are almost same.The dissolving rate, the water binding capacity, the oil binding capacity of Superfine powder coffee is higher than ordinary coffee powder,is more suitable for processing.(3)30 minute was chosen as the best superfine grinding time by investigating the size,microstructure, infrared spectrum, the dissolving-out amount of trigonelline dissolubility,chlorogenic acid, caffeine of different superfine grinding time coffee powder.(4)0.22% propylene glycol alginate,0.10% sucrose fatty acid ester,0.20% Single and double glycerol fatty acid ester,0.23% hydroxypropyl starches was chosen as the best compound emulsifier of the coffee superfine powder drink by Single factor experiment and orthogonal experiment with interfacial tension (IFT), and the absorbance of the lower solution as an index.(5) 0.15% xanthan gum,0.3 5% hydroxypropyl starch,0.20% propylene glycol alginate,0.13% sodium carboxymethyl cellulose was chosen as the best compound emulsifier of the coffee superfine powder drink by Single factor experiment and orthogonal experiment with the coffee beverage thickening stability, and the viscosity index as an index.(6)5.97% pineapple fruit powder, 42% milk powder, 35% superfine coffee powder, 7%glucose was chosen as the best formula of pineapple milk coffee drink;32.03% mango fruit powder, 23.14% milk powder, 17.81% superfine coffee powder, 8.10% glucose was chosen as the best formula of Mango milk coffee drink;42% banana fruit powder, 16%milk powder, 18% superfine coffee powder, 12% glucose was chosen as the best formula of the banana milk coffee drink. The best formula were selected through Box-Benhnken center-united experiment design and Response Surface Methodology with sensory score as the indicator.(The part of less than 100% were filled with dextrin.)(7)Three kinds of tropical fruit milk coffee were determinated by electronic tongue at random in this paper,we found that three kinds of tropical fruit milk coffee were distinguished effectively by the principal component analysis and cluster analysis based on Euclidean distance of the test results.(8)The quality of the three kinds of tropical fruit milk coffee beverages product were evaluated in this paper.It's the first time to combine the superfine grinding technology with the coffee beans in this paper, the ultramicro particle characteristics and processing eligibility were also studied, provide a foundation of theoretical basis for the future study.At the same time, the best composite emulsifying stabilizer and the best Composite thickening stabilizer for the coffee superfine powder drink were selected to replace the traditional vegetable fat powder.We combined the coffee superfine powder with milk powder and tropical fruit,a new type of coffee beverage was developed,and it will also lead to the development of other agricultural industry in hainan.