|
Amakusa, South incense, intrauterine Iyo tangerine, Nova, sweet tangelo hybrid citrus raw materials, its the processing juice adaptability aroma components of solid phase micro extraction conditions determined and aroma analysis, film separation process, juice drinks recipes and so a more comprehensive study provides a theoretical basis for the comprehensive utilization of hybrid citrus and guiding role. The main findings are as follows: five varieties of hybrid citrus fruit quality and juice performance, the results show that: the juice soluble solids content ranged from 12.84% -14.21%, 13.70% on average; titratable acid content range 0.51% -0.84%, average 0.69%; range of juice yield of 46.34% -57.82%, average 52.52%, the order of the juice yield: Amakusa gt; South incense gt; intrauterine Iraq to Kom gt; Nova gt; Sweet Orange. After comprehensive evaluation, the Amakusa South fragrant juice yield, soluble solids and titratable acidity, reducing sugar indicators than higher juice flavor, and tasting juice taste and aroma score higher juice varieties. To intrauterine Iyo tangerine juice as the main raw material of different fiber head, adsorption time, adsorption temperature, NaCl concentration, sample volume, stirring solid phase micro-extraction efficiency. And orthogonal experiment SPME-GC operation optimal parameters: NaCl concentration of 25%, extraction temperature of 40 ° C, extraction time of 40 min, add Sample 1 g Under these conditions, the total peak area extraction works best. Terpenes and alcohols by of hybrid citrus South incense, Nova, intrauterine Iyo tangerine, Amakusa, Sweet Orange juice aromatic substances GC / MS analysis of the main ingredients, different hybrid citrus juice incense gas composition vary widely. Variety of aroma South incense, Amakusa, Sweet Orange juice not only aromatic ingredients and ingredients mostly to various terpenes, and light aroma Nova and intrauterine Iraq to the tangerine juice aroma components less variety . South of fragrant juice as raw materials, were determined by single factor experiment ultrafiltration conditions: 40 ° C and 0.3 MPa, 0.1% NaOH and 0.15% NaClO mixed solution is ideal ultrafiltration membrane cleaning agent, cleaning after membrane flux recovery rate of 90%. After ultrafiltration separation Southern fragrant juice concentrated by reverse osmosis of experimental determination of the reverse osmosis concentration the hybrid citrus juices operation conditions 40 ° C, 1.0MPa, 1.5 m / s, in this condition Southern fragrant juice can be concentrated to 33 ° Bx. Decay to 40% in the membrane flux, compared two methods of cleaning effect, the results show that: 1% H2O2 0.15% NaClO better than the 0.1% NaOH, membrane flux after cleaning to achieve a 96% recovery rate. By orthogonal design, the South fragrant juice drink recipe. The results show that the best recipe: fruit juice containing 15% and 8% of the sugar content, 0.16% Hansuan, composite stabilizer sodium alginate 0.04% and 0.08% CMC-Na.
|