Aquatic vegetable anti-staling agent

The invention relates to an aquatic vegetable preservative, which comprises citric acid, calcium chloride, sodium tripolyphosphate and vitamin C solution; the quality percentage concentration of the components are that: citric acid accounts for 0.15 percent to 0.2 percent; calcium chloride accounts for 0.5 percent; sodium tripolyphosphate accounts for 0.3 percent to 0.5 percent ; and vitamin C occupies 0.15 percent to 0.2 percent. The invention can be used in the refreshment of fresh lotus seeds, fresh water bamboo and fresh lotus root. The preservation methods are that: firstly, after the processing of sterilization, the fresh lotus seeds, fresh water bamboo and fresh lotus root are soaked for 15 minutes by the chlorine dioxide in a certain concentration; secondly, the dried fresh lotus seeds, fresh water bamboo and fresh lotus root are soaked and sterilized for 2 hours by the preservative in a certain percentage, and then the free water on which is drained; thirdly, a vacuum packaging or modified atmosphere packaging can be implemented for the materials, and then is arranged in the environment under 0 DEG C to 5 DEG C for storage; the shelf life for the aquatic vegetable is more than or equal to 60 days. After the toxicity test, the preservative is in a relative non-toxic level. The invention has the advantages of safety and high efficiency without sulfite components.