CN107125299A - 一种用于罗非鱼片保鲜的复合保鲜剂及其应用 - Google Patents
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Abstract
本发明公开了一种用于罗非鱼片保鲜的复合保鲜剂及其应用,属于食品加工技术领域。本发明复合保鲜剂的组分,按重量百分数计,壳聚糖0.5%、甘油0.25%、凉薯淀粉0.1~2%,其余为水。复合保鲜剂覆膜罗非鱼片,能起到抑制微生物生长、降低脂质氧化速率,减少鱼体干耗的作用,与普通冷藏方法相比能更好的保持罗非鱼片的新鲜度、水分和风味,达到更好的保鲜效果,延长其货架期。
Description
技术领域
本发明涉及一种用于罗非鱼片保鲜的复合保鲜剂及其应用,属于食品加工技术领域。
背景技术
罗非鱼是一种中小型鱼,食性广泛,广盐性鱼类,在海水和淡水中皆可生存。蛋白质与脂肪含量分别为20.5%和6.9%左右。并含有维生素与矿物质等营养元素,营养价值高,肉鲜味美,深受消费者的喜爱。我国2014年罗非鱼商业捕捞量高达145万吨,市场上罗非鱼成品,半成品种类很多,其中之一便是罗非鱼片,但由于其易受微生物及酶的作用,产生营养物质流失、持水量不足、感观品质下降、货架期变短等问题。所以一直以来罗非鱼的经营销售面临的最大问题是其保鲜问题。可食性膜材料来源广泛,生物材料如蛋白质、多糖、脂肪或者具有良好成膜特性的两种或者更多的混合物均可作为可食性膜的材料,其中常用的可食性膜材料有壳聚糖、淀粉、海藻酸和纤维素等。
罗非鱼常用的保鲜方法有低温保鲜、化学保鲜和涂膜保鲜。专利201410047415.4公布了一种罗非鱼片的保鲜冷冻加工方法,通过其方法可以有效提高罗非鱼片质量及延长其货架期。张强等人(2011)研究表明采用真空包装和微冻处理罗非鱼片,可以有效降低水分流失及减少挥发性氨基氮(TVB-N)的生成。程晓眠等人(2011)研究表明罗非鱼经壳聚糖或茶多酚涂膜保鲜后,能有效提高质量,细菌总数、硫代巴比妥酸值(TBA)、TVB-N值和K值均显著低于对照组。由以往研究可见可食性膜相对于其他保鲜方式有着一定的优势受到广泛关注,如对水分、氧气和光的屏障作用,以及膜组分自身的一些特性如:抗氧化、抗菌等。
凉薯(Pachyrhizus erosus)属于豆科,其淀粉属性和木薯淀粉特性十分接近(Mélo, Stamford, Silva, Krieger, & Stamford, 2003),这意味着凉薯淀粉作为可食性膜组分具有较大的潜力,然而至今现有凉薯淀粉作为可食性膜组分的报道。
发明内容
本发明的目的是提供一种用于罗非鱼片保鲜的复合保鲜剂,该复合保鲜剂的原料由以下组分制成,按重量百分数计为:壳聚糖0.5%、甘油0.25%、凉薯淀粉0.1~2%,其余为水。
本发明的另一目的是提供所述用于罗非鱼片保鲜的复合保鲜剂的应用方法,具体步骤如下:
(1)按比例配制复合保鲜剂;
(2)将新鲜罗非鱼去头、去鳞、去内脏、去骨、去皮,洗净沥干并切割成片状,再置于步骤(1)所得复合保鲜剂中浸泡10~30s,然后捞出沥干30~60 s得到覆膜鱼片;
(3)将步骤(2)所得覆膜鱼片放入保鲜袋中扎口,然后置于温度不高于4℃的环境中保藏。
所述用于罗非鱼片保鲜的复合保鲜剂的制备方法为常规的溶液配制方法,其具体步骤如下:
(1)凉薯淀粉的制备:将新鲜,无病虫害的凉薯块茎用蒸馏水洗净,去皮、称重、粉碎、加入称重5倍体积的蒸馏水混匀,置于40~50℃恒温水域振荡器中8~12 h,在室温、搅拌速度为3000~5000r/min离心处理20 min,弃去上清液,洗涤得到淀粉湿块,将淀粉湿块置于温度为-40℃条件下冷冻干燥24 h,粉碎过100目筛得到凉薯淀粉;
(2)壳聚糖溶液配制:将壳聚糖溶解在醋酸水溶液中,加入甘油并混合均匀得到溶液A;
(3)凉薯淀粉溶液配制:将步骤(1)所得凉薯淀粉溶解于甘油中,得到溶液B;
(4)将步骤(2)所得溶液A与步骤(3)溶液B等体积混合均匀即得用于罗非鱼片保鲜的复合保鲜剂。
本发明的有益效果是:
(1)本发明的用于罗非鱼片保鲜的复合保鲜剂的原料采用天然的壳聚糖及凉薯淀粉,其原料价廉易得,保护环境;
(2)本发明的用于罗非鱼片保鲜的复合保鲜剂安全可靠,无色无异味,不影响鱼片感观;
(3)本发明的用于罗非鱼片保鲜的复合保鲜剂能有效减少水分流失,阻止氧气对鱼片的氧化,抑制微生物的生长繁殖,更好的保持了罗非鱼片的品质,有效延长其货架期,具有良好的保鲜效果。
附图说明
图1是经复合保鲜剂冰鲜罗非鱼片与常规冰鲜罗非鱼片菌落总数的变化趋势图;
图2是经复合保鲜剂冰鲜罗非鱼片与常规冰鲜罗非鱼片挥发性氨基氮(TVB-N)的变化趋势图;
图3是经复合保鲜剂冰鲜罗非鱼片与常规冰鲜罗非鱼片硫代巴比妥酸值(TBA)的变化趋势图;
图4是经复合保鲜剂冰鲜罗非鱼片与常规冰鲜罗非鱼片水分损失的变化趋势图。
其中:CK为常规冰鲜罗非鱼片、T1为实施例1经复合保鲜剂冰鲜罗非鱼片、T2为实施例2经复合保鲜剂冰鲜罗非鱼片、T3为实施例3经复合保鲜剂冰鲜罗非鱼片、T4为实施例4经复合保鲜剂冰鲜罗非鱼片。
具体实施方式
下面结合具体实施方式对本发明作进一步详细说明,但本发明的保护范围并不限于所述内容。
所有实施例中用于罗非鱼片保鲜的复合保鲜剂的制备方法均为常规的溶液配制方法,其具体步骤如下:
(1)凉薯淀粉的制备:将新鲜,无病虫害的凉薯块茎用蒸馏水洗净,去皮、称重、粉碎、加入称重5倍体积的蒸馏水混匀,置于40~50℃恒温水域振荡器中8~12h,在室温、搅拌速度为3000~5000r/min离心处理20 min,弃去上清液,洗涤得到淀粉湿块,将淀粉湿块置于温度为-40℃条件下冷冻干燥24 h,粉碎过100目筛得到凉薯淀粉;
(2)壳聚糖溶液配制:将壳聚糖溶解在醋酸水溶液中,加入甘油并混合均匀得到溶液A;
(3)凉薯淀粉溶液配制:将步骤(1)所得凉薯淀粉溶解于甘油中,得到溶液B;
(4)将步骤(2)所得溶液A与步骤(3)溶液B等体积混合均匀即得用于罗非鱼片保鲜的复合保鲜剂。
实施例1:用于罗非鱼片保鲜的复合保鲜剂,该复合保鲜剂的原料由以下组分制成,按重量百分数计为:
壳聚糖 0.5%
甘油 0.25%
凉薯淀粉 0.1%
其余为水。
所述用于罗非鱼片保鲜的复合保鲜剂的应用方法,具体步骤如下:
(1)按比例配制复合保鲜剂;
(2)将新鲜罗非鱼去头、去鳞、去内脏、去骨、去皮,洗净沥干并切割成片状,再置于步骤(1)所得复合保鲜剂中浸泡10s,然后捞出沥干30s得到覆膜鱼片;
(3)将步骤(2)所得覆膜鱼片放入保鲜袋中扎口,放入底部覆盖5 cm冰的泡沫箱中,按一层鱼一层冰摆放,覆盖于鱼片上的冰层厚度为3 cm,且鱼层为3层,使鱼片处于冰的包围中,冰与鱼的质量比为2:1。将包装好的泡沫箱放置于3℃冷藏柜中贮藏,每隔24 h排除融冰产生的水分并补充冰,使鱼片始终处于冰的包围中;
每隔3天对罗非鱼片进行菌落总数、TVB-N、TBA、水分损失和感观评分的测定。选择常规冰鲜罗非鱼片为对照组,测试结果如图1~4所示,从图中结果可知,本实施例经复合保鲜剂冰鲜的罗非鱼片,在各项指标上均明显优于对照组,贮藏第15天,罗非鱼片菌落总数为106.95 CFU/g,TVB-N值为18.01 mg/100 g,TBA值为0.83 mg MA/kg,水分损失为7.24%,相比于常规冰鲜处理,复合保鲜剂冰鲜的罗非鱼片货架期延长3天。
实施例2:用于罗非鱼片保鲜的复合保鲜剂,该复合保鲜剂的原料由以下组分制成,按重量百分数计为:
壳聚糖 0.5%
甘油 0.25%
凉薯淀粉 0.5%
其余为水。
所述用于罗非鱼片保鲜的复合保鲜剂的应用方法,具体步骤如下:
(1)按比例配制复合保鲜剂;
(2)将新鲜罗非鱼去头、去鳞、去内脏、去骨、去皮,洗净沥干并切割成片状,再置于步骤(1)所得复合保鲜剂中浸泡30s,然后捞出沥干60 s得到覆膜鱼片;
(3)将步骤(2)所得覆膜鱼片放入保鲜袋中扎口,放入底部覆盖5 cm冰的泡沫箱中,按一层鱼一层冰摆放,覆盖于鱼片上的冰层厚度为3 cm,且鱼层为2层,使鱼片处于冰的包围中,冰与鱼的质量比为2:1。将包装好的泡沫箱放置于4℃冷藏柜中贮藏,每隔24 h排除融冰产生的水分并补充冰,使鱼片始终处于冰的包围中;
每隔3天对罗非鱼片进行菌落总数、TVB-N、TBA、水分损失和感观评分的测定。选择常规冰鲜罗非鱼片为对照组,测试结果如图1~4所示,从图中结果可知,本实施例经复合保鲜剂冰鲜的罗非鱼片,在各项指标上均明显优于对照组,贮藏第15天,罗非鱼片菌落总数为106.93 CFU/g,TVB-N值为18.29 mg/100 g,TBA值为0.71 mg MA/kg,水分损失为7.35%,相比于常规冰鲜处理,复合保鲜剂冰鲜的罗非鱼片货架期延长3天。
实施例3:用于罗非鱼片保鲜的复合保鲜剂,该复合保鲜剂的原料由以下组分制成,按重量百分数计为:
壳聚糖 0.5%
甘油 0.25%
凉薯淀粉 1%
其余为水。
所述用于罗非鱼片保鲜的复合保鲜剂的应用方法,具体步骤如下:
(1)按比例配制复合保鲜剂;
(2)将新鲜罗非鱼去头、去鳞、去内脏、去骨、去皮,洗净沥干并切割成片状,再置于步骤(1)所得复合保鲜剂中浸泡15s,然后捞出沥干40s得到覆膜鱼片;
(3)将步骤(2)所得覆膜鱼片放入保鲜袋中扎口,放入底部覆盖5 cm冰的泡沫箱中,按一层鱼一层冰摆放,覆盖于鱼片上的冰层厚度为3 cm,且鱼层为3层,使鱼片处于冰的包围中,冰与鱼的质量比为2:1。将包装好的泡沫箱放置于4℃冷藏柜中贮藏,每隔24 h排除融冰产生的水分并补充冰,使鱼片始终处于冰的包围中;
每隔3天对罗非鱼片进行菌落总数、TVB-N、TBA、水分损失和感观评分的测定。选择常规冰鲜罗非鱼片为对照组,测试结果如图1~4所示,从图中结果可知,本实施例经复合保鲜剂冰鲜的罗非鱼片,在各项指标上均明显优于对照组,贮藏第15天,罗非鱼片菌落总数为106.77 CFU/g,TVB-N值为19.97 mg/100 g,TBA值为0.69 mg MA/kg,水分损失为6.75%,相比于常规冰鲜处理,复合保鲜剂冰鲜的罗非鱼片货架期延长3天。
实施例4:用于罗非鱼片保鲜的复合保鲜剂,该复合保鲜剂的原料由以下组分制成,按重量百分数计为:
壳聚糖 0.5%
甘油 0.25%
凉薯淀粉 2%
其余为水。
所述用于罗非鱼片保鲜的复合保鲜剂的应用方法,具体步骤如下:
(1)按比例配制复合保鲜剂;
(2)将新鲜罗非鱼去头、去鳞、去内脏、去骨、去皮,洗净沥干并切割成片状,再置于步骤(1)所得复合保鲜剂中浸泡25s,然后捞出沥干50 s得到覆膜鱼片;
(3)将步骤(2)所得覆膜鱼片放入保鲜袋中扎口,放入底部覆盖5 cm冰的泡沫箱中,按一层鱼一层冰摆放,覆盖于鱼片上的冰层厚度为3 cm,且鱼层为3层,使鱼片处于冰的包围中,冰与鱼的质量比为2:1。将包装好的泡沫箱放置于4℃冷藏柜中贮藏,每隔24 h排除融冰产生的水分并补充冰,使鱼片始终处于冰的包围中;
每隔3天对罗非鱼片进行菌落总数、TVB-N、TBA、水分损失和感观评分的测定。选择常规冰鲜罗非鱼片为对照组,测试结果如图1~4所示,从图中结果可知,本实施例经复合保鲜剂冰鲜的罗非鱼片,在各项指标上均明显优于对照组,贮藏第15天,罗非鱼片菌落总数为107.03 CFU/g,TVB-N值为19.69 mg/100 g,TBA值为0.66 mg MA/kg,水分损失为7.41%,相比于常规冰鲜处理,复合保鲜剂冰鲜的罗非鱼片货架期延长3天。
Claims (2)
1.一种用于罗非鱼片保鲜的复合保鲜剂,其特征在于,该复合保鲜剂的原料由以下组分制成,按重量百分数计为:壳聚糖0.5%、甘油0.25%、凉薯淀粉0.1~2%,其余为水。
2.权利要求1所述用于罗非鱼片保鲜的复合保鲜剂的应用方法,其特征在于,具体步骤如下:
(1)按比例配制复合保鲜剂;
(2)将新鲜罗非鱼去头、去鳞、去内脏、去骨、去皮,洗净沥干并切割成片状,再置于步骤(1)所得复合保鲜剂中浸泡10~30s,然后捞出沥干30~60 s得到覆膜鱼片;
(3)将步骤(2)所得覆膜鱼片放入保鲜袋中扎口,然后置于温度不高于4℃的环境中保藏。
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CN106465744A (zh) * | 2016-09-27 | 2017-03-01 | 江南大学 | 一种用于生鲜罗非鱼片保鲜的保鲜膜液及其制备方法 |
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CN106465744A (zh) * | 2016-09-27 | 2017-03-01 | 江南大学 | 一种用于生鲜罗非鱼片保鲜的保鲜膜液及其制备方法 |
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