Study on preservative effect of stable ClO2 on shelled penaeus shrimp

Objective To investigate the effect of stable chlorine dioxide(ClO₂)on the preservation of shelled penaeus shrine (Penacus VannameiBoone).Methods Samples of shelled penaeus shrine were dipped in the solution containing 25,50,100mg/kg of stable ClO₂ respectively,and the sensory,microbiological and physio-themical properties of samples were assessed to evaluate the preservative effect.Results Additive of stable ClO₂ significantly reduced the rate of head- browning,total microbial counts and total volatile basic nitrogen (TVB-N)contents Totalmicrobial counts were reduced with the increase of stable ClO₂ concentration(P<0.01),and reachecd the lowest when the dipping time was 30 min The TVB-N in samples after treahn entw as within the lin it of national hygiene standard.Conclusion The proper conditions of stable ClO₂ application for the preservation of shelled penaeus shrine were: a concentration of 50 mg/kg,treahnent time of 30 min,and solution temperature 10℃.