Freshness preservation method of passion fruits

Abstract

A purpose of the invention is to provide a freshness preservation method of passion fruits. The freshness preservation method of the passion fruits is used for preserving fresh passion fruits; in the method, no chemical additives or preservatives, mildew proof agents and the like are added, no artificial fruit wax is used, and the preserved passion fruits are mellow in fragrances. A passion fruit preservative agent used in the freshness preservation method is composed of the following ingredients in percentage by weight: 80-100% of passion fruit peel extract, 0-15% of passion fruit seed extract and 0-5% of sodium alginate. The freshness preservation method of the passion fruits is characterized by comprising the following steps: (1), picking passion fruits which are 70-80 percent mature; (2), washing off impurities and dirt on surfaces of the passion fruits by using running water; (3), air-drying moistures on the surfaces of the washed passion fruits at normal temperature until no wet feeling exist by touching with the hands, wherein the moistures of the air-dried passion fruits are 100-105% of the moistures of the unwashed fresh passion fruits; (4), irradiating the fresh passion fruits by gamma rays or 10MeV electron beams; (5), directly soaking the irradiated fresh passion fruits in the preservative agent which is prepared from passion fruit extracts for 3-10 seconds, wherein the passion fruits are covered by the preservative agent; and (6), air-drying the soaked fresh passion fruits at normal temperature until no wet feeling exist by touching with the hands, wherein the moistures of the air-dried passion fruits are 102-110% of the moistures of the unwashed fresh passion fruits.

Description

technical field [0001] The invention relates to a passion fruit fresh-keeping method, in particular to a passion fruit fresh-keeping method which is safe, effective, low in cost and capable of increasing the passion fruit fragrance. Background technique [0002] Passion fruit is an evergreen herbaceous vine of the Passiflora edulis family, commonly known as egg fruit and passion fruit. It is native to Brazil, Paraguay and other places in South America, and is now widely planted in tropical and subtropical regions of the world. The passion fruit plant has slender branches, huge flowers, peculiar shape, bright colors, high yield, and strong fragrance of juice. It is not only a good garden ornamental plant, but also a good fruit. In recent years, it has been planted in large quantities in Hainan, Fujian, and Guangdong and Guangxi in my country. Passion fruit has purple fruit, yellow fruit, yellow-purple hybrid fruit, etc. At present, yellow fruit varieties and hybrid varieties...

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