Application Of Chlorine Dioxide In Controlling Freshness And Safety Of Spinach During Storage

The vegetables are easily influenced by the factors such as microorganism, chemistry, etc. The factors not only cause vegetables to rot, but also to decline of nutrition quality and safety quality in preservation. Now new technology is used to improve the quality of vegetables. It can improve vegetables industry's efficiency. Chlorine dioxide has very strong effect of oxidation, and is generally acknowledged as the world's ideal and excellent performance food fresh-keeper and bactericide. It can reduce effectively the occurring of eating source disease, and has some remarkable effect in keeping fresh respects. The tests used the stability and slowness desorption chlorine dioxide to deal with spinach. We have studied the regulation of bacterium, mould, nitrate, nitrite, and nitrate reductase in spinach. At the same time we have studied the function of improving freshness quality. Main result and conclusion are as follows:1. Chlorine dioxide can kill the bacterium, mould in the spinach notably, it is obvious to suppress the growing of the bacterium. The experimental result indicates that the best one to deal with spinach is 75mg/L.The-sterilizing rate of bacterium is 98.85%. The sterilizing rate of mould is 80.85%. The fungi, which pollute the spinach, are mainly blue mould.2. Chlorine dioxide can prolong the freshness time of spinach. Chlorine dioxide whose concentration is 75mg/L can keep spinach fresh and green for more than 12 days.3. In vivo nitrate reductase activity of spinach decreased rapidly after store. There is significant difference in vivo nitrate reductase activity between the chlorine dioxide, whose density is 75mg/L and check.4. The change of nitrate and nitrite was not significant in lamina through the whole storage. Midrib nitrite was low at first, but increased after 3 days of storage. The chlorine dioxide whose density is 75mg/L can reduce the inferior content of nitrate notably.5. Slowness desorption chlorine dioxide can reduce in vivo nitrate reductase,...