常用的防腐剂有：苯甲酸钠、硝酸盐、亚硝酸盐和二氧化硫（SO2)，都是用于食物防腐，苯钾酸钠通常是于饮料的防腐剂，福尔马林是用在鱼的防腐。
综述了各种天然食品防腐剂的研究现状和在食品工业中的应用，展望了其应用前景。
The paper dwells on the research of several natural food preservatives, their application in food industry and predicts their prospects.
真菌溶菌酶作为天然防腐剂，在食品工业中具有广泛的用途。
As natural food antiseptic agents, fungal lysozymes are applied in food industry widely.
抗微生物酶作为天然防腐剂，在食品工业中具有广泛的用途。
As natural food antiseptic agents, antimicrobial enzymes are applied in food industry widely.
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