A new pretreatment technique for the sensitive and accurate determination of benzoic and propionic acids in fishery products by HPLC-DAD and GC-MS was established to address the regulatory problem posed by the natural metabolic production of preservatives during food processing. A total of 786 samples (332 raw fish and 454 processed fish products) were investigated. Benzoic acid was detected in 2.4% of raw fish samples, 9.7% of processed product samples, while the corresponding numbers for propionic acid equalled 88.3% and 94.7% respectively. As are result of monitoring the samples obtained from the Korean market, propionic acid was detected in most samples, but benzoic acid was detected in some fish. These results provide fundamental data regarding naturally occurring preservatives in fishery. As a result of these databases in fishery could be used as important data for the judgement that they are naturally originated preservatives.

建立了一种新的预处理技术，用于通过HPLC-DAD和GC-MS灵敏而准确地测定渔业产品中的苯甲酸和丙酸，以解决食品加工过程中防腐剂天然代谢产生的监管问题。共调查了786个样品（332个生鱼和454个加工鱼产品）。生鱼样品中检出苯甲酸的比例为2.4％，加工产品样品中检出的比例为9.7％，而丙酸的相应数量分别为88.3％和94.7％。监测从韩国市场获得的样品的结果，在大多数样品中检测到丙酸，但在某些鱼类中检测到苯甲酸。这些结果提供了有关渔业中天然防腐剂的基础数据。