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Proposed new color retention method for tilapia fillets (O-niloticus female x O-aureus male) by euthanatizing with reduced carbon monoxide

文献类型: 外文期刊

作者: Li, Laihao 1 ; Hao, Shuxian 1 ; Diao, Shiqiang 1 ; Cen, Jianwei 1 ; Yang, Xianqing 1 ; Shi, Hong 1 ; Chen, Shengjun 1 ;

作者机构: 1.Chinese Acad Fishery Sci, S China Sea Fishery Res Inst, Guangzhou 510300, Guangdong, Peoples R China

期刊名称:JOURNAL OF FOOD PROCESSING AND PRESERVATION ( 影响因子:2.19; 五年影响因子:2.271 )

ISSN: 0145-8892

年卷期: 2008 年 32 卷 5 期

页码:

收录情况: SCI

摘要: The conditions of color retention for tilapia fillets (O. niloticus female x O. aureus male) treated by euthanatizing with reduced carbon monoxide (CO) were investigated. Live tilapias were first exposed to water saturated with CO. After a certain amount of CO-saturated water had been pumped through the gills, the tilapias were timely picked out and killed following the industry guidelines. The color value of fillets was measured by colorimeter to evaluate the color retention. The results showed that (1) temperature did not have a significant effect on the color of the fillets; (2) the optimal conditions were a ratio of 3:1, v/w between water and fish, a CO flow rate of 80 mL/min and 10 min CO injection followed by 5 min air exposure. Under these conditions, a higher a* value (redness 19.44) and a better sensory evaluation value (4.8) were obtained; and (3) the proposed method shortened processing time by 30-35 min, reduced the frequency of sterilization to only once, significantly lowered microbial counts from 82.33 x 10(2) to 56.33 x 10(2) and reduced the CO requirement 25-fold, which has significant occupation, health, safety, and environmental implications.

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