野生蕨菜护色工艺及干燥方式研究

Research of Color Preservation Technology and Drying Process of Wild Pteridium aquilinum

对野生蕨菜进行护色及干燥方式研究。确定亚硫酸钠作为护色液,通过响应曲面试验得出最佳护色条件为:护色液浓度30.21 mg/100 g,护色温度100℃,护色时间2.0 min。从失水率、复水率、感官指标、黄酮含量和铁含量方面考虑,热风干燥、真空干燥和远红外干燥这3种干燥方式各有优点,就生产效率而言,真空干燥和远红外干燥技术较好;就感官评价来说,远红外干燥和热风干燥较好;就黄酮和铁的保留量来说,热风干燥和真空干燥较好。

Study the color preservation technology and drying process of wild Pteridium aquilinum. The sodium sulfite as color protection solution, through the response surface experiments, the best color preservation condition was that the concentration of color protection solution of 30.21 mg/100 g, the color protection temperature of 100 ℃ and the color protection time of 2.0 min. Hot air drying, vacuum drying and far infrared drying had their own advantages, considering the water loss rate, the rehydration rate, the sensory index, the flavonoid content and the iron content, hot air drying. Vacuum drying and far infrared drying were better in terms of production efficiency; far infrared drying and hot air drying were better in terms of sensory evaluation; hot air drying and vacuum drying were better in terms of the reserve quantity of flavonoid and iron.