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A double‐layer agar plate (DLAP) method was used to detect Vibrio parahaemolyticus in culture broth and seafood samples, which were added with certain amount of V. parahaemolyticus and then subjected to freezing treatment. The results of DLAP, which were compared with the most probable number (MPN) method and direct‐plating methods such as Bio‐chrome Vibrio medium (BCVM) and thiosulfate–citrate–bile...
The present study established a method to determine 7 hydroxy metabolites of polychlorinated biphenyls (PCBs) in aquatic products.Target compunds were extracted by hexane/ethyl acetate (v/v,1:1). Sulfuric acid and silica column were used to remove the impurities with 50 ml of hexane/ethyl acetate (v/v,1:1) as eluet. Silylation derivatization was effective and stable to make hydroxylated polychlorinated...
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