超高压处理对卤制鹅胗灭菌保鲜与品质的影响

    Effects of ultra-high pressure processing on sterilization and quality attributes of spiced goose gizzard

    • 摘要: 为了揭示超高压处理对卤制鹅胗灭菌保鲜与品质的影响,以100、200、300、400、500、600 MPa的压力对卤制鹅胗进行处理,保压15 min,以未经高压处理的样品为对照,室温(20±5)℃存放至第1、5、9 天测定样品的菌落总数、大肠杆菌及沙门氏菌等微生物指标,同时对样品的pH值、嫩度、色差等理化指标以及感官指标进行分析。结果表明:400 MPa以上压力保压15 min可以有效抑制大肠杆菌和沙门氏菌的生长;200~500 MPa处理对pH值的影响不显著(P>0.05),在9 d存放期中,pH值整体呈下降趋势,鹅胗样品中心点pH值高于边缘部位;超高压处理对嫩度没有显著影响(P>0.05);超高压处理对表面色差有显著影响(P<0.05)。从感官上分析,高压处理对卤制鹅胗的口感、气味及质地等感官品质影响不显著。超高压处理不仅具有较好的杀菌效果,而且最大限度地保证了卤制鹅胗的品质。

       

      Abstract: In order to reveal the effects of ultra-high pressure (UHP) processing on sterilization and quality of spiced goose gizzard, the spiced goose gizzard were treated by UHP at 100, 200, 300, 400, 500 and 600 MPa for 15 minute, and the untreated samples (CK) were used as control group. Samples were stored at room temperature (20±5)℃, then microbiological index of total bacteria, escherichia coli, salmonella were measured 1, 5, 9 days after treatment, meanwhile, the physicochemical index of pH value, tenderness, color and the sensory index were analyzed on the treated and control gizzard. The results showed that total number of bacteria declined with the increase of pressure (100-600 MPa); the growth of escherichia coli and salmonella could be effectively inhibited at more than 400 MPa for 15 minute; 200-500 MPa have no significant effect on pH value (P>0.05), pH value of the treated and control group showed downtrend during 9 days storage period, pH value of center point was higher than which of peripheral position. UHP processing had no significant effect on tenderness (P>0.05); Compared with CK, UHP processing had significant effect (P<0.05) on color of samples’ surface. The result of sensory analysis showed that there was no significant difference on taste, smell and texture between the treated group and CK. It is concluded that UHP processing can effectively inactivate the microbe and maintain the flavor and quality of spiced goose gizzard.

       

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