CN108514086A - 一种即食酥脆淡水虾的制备方法 - Google Patents
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Abstract
本发明涉及一种即食酥脆淡水虾的制备方法,包括前处理、漂烫、护色处理、真空浸渍、真空冷冻、热风干燥和真空微波膨化等步骤,解决了现有技术中虾产品普遍存在的口感不好、脂肪含量高、含致癌物等问题,本发明在前处理阶段采用可食用的植酸和茶多酚进行护色处理,从源头进行品质保护,并且采用低温真空冷冻干燥,保留了原料虾的色泽和营养成分,有利于形成酥脆口感,本发明还采用真空微波膨化,受热时间短,生产效率高,避免了油脂含量高,甚至会产生大量致癌物质的弊端,本制备方法中无高温油炸处理,最大程度保护原料虾营养价值的流失,产品具有低脂肪、低热量、高营养等特点,符合当今人们对食品绿色健康、休闲方便的需求。
Description
技术领域
本发明涉及一种即食酥脆淡水虾的制备方法,属于食品加工技术领域。
背景技术
常见的淡水虾有南美白对虾、罗氏沼虾、青虾、河虾、草虾、小龙虾等,其肉嫩鲜美,食之既无鱼腥味,又没有骨刺,老幼皆宜,备受青睐。虾营养极为丰富,所含蛋白质是鱼、蛋、奶的几倍到几十倍;还含有丰富的钾、碘、镁、磷等矿物质及维生素A、氨茶碱等成分,且其肉质和鱼一样松软,易消化,不失为老少皆宜的营养佳品,对身体虚弱以及病后需要调养的人也是极好的食物。
目前大多鲜活销售,但其耗氧性高,极易死亡,虾含水量高,极其容易腐败。目前市场上大都以传统脱水干制为手段来保存产品,这样影响产品的口感,且不易食用和消化;或者通过油炸膨化,产品脂肪含量较高,不适合老年人和儿童食用,其生产过程中还有可能产生大量的致癌物质。本方法通过现代加工技术真空冷冻、真空微波膨化制备的即食酥脆虾,避免了传统加工方法的弊端,产品绿色、方便、健康。
发明内容
本发明的目的在于解决现有技术的不足,提供一种即食酥脆淡水虾的制备方法,方法简单,制得的即食酥脆淡水虾口感好、营养价值高。
技术方案
一种即食酥脆淡水虾的制备方法,包括如下步骤:
(1)前处理:将鲜虾用水温不高于20℃的水洗净,然后去虾头、壳及肠腺,得虾仁;
(2)漂烫:将虾仁浸于1-2wt%的食盐溶液中,在75±5℃下煮制2-5min,然后捞出虾仁,沥干,冷却;
(3)护色处理:将漂烫后的虾仁置于茶多酚和植酸的混合溶液中浸泡5-10min,然后捞出,沥干;
(4)真空浸渍:将经过护色处理的虾仁置于2-4倍虾仁重量的调味液中真空浸渍30-60min,然后过滤;
(5)真空冷冻:将真空浸渍后的虾仁进行真空冷冻,冷冻温度-40℃,冷冻时间25-40h,真空速率4L/s;
(6)热风干燥:将真空冷冻后的虾仁进行热风干燥,干燥温度55-65℃;
(7)真空微波膨化:将热风干燥后的虾仁在真空微波设备中进行真空微波膨化,然后冷却,最后进行定量充氮包装,即得。
步骤(3)中,茶多酚和植酸的混合溶液中,茶多酚的质量浓度为0.1%,植酸的质量浓度为0.15%。
步骤(4)中,真空浸渍的真空度为80-100Pa。
步骤(4)中,所述调味液为调味品加入20倍调味品重量的水煮沸2h熬制而成,所述调味品包括如下重量份组分:食盐1-5份、糖1-5、花椒0-2份、大蒜0-2份、生姜0.5-2份、料酒0.2-1份、八角0-0.5份、桂皮0-0.5份、小茴香0-0.5份、砂仁0-0.5份、海苔0-0.5份、咖喱0-0.5份、辣椒0-0.5份、蜂蜜0-1.5份、红茶0-1份。
步骤(6)中,热风干燥的风速为1-2m/s,时间为1-3h。
步骤(7)中,真空微波膨化的真空度80-100Pa,功率600w,微波时间2-5min。
本发明的有益效果:本发明提供了一种即食酥脆淡水虾的制备方法,与现有技术相比,具有以下优点:
1.本发明在前处理阶段采用可食用的植酸和茶多酚进行护色处理,从源头进行因氧化而变褐色的品质保护;
2.真空冷冻干燥在低温真空状态下进行,保留了原料虾的色泽和营养成分,虾体内的水分不经液态直接升华成气态,保持虾体原有的形状,虾肉组织形成空洞,有利于形成真空微波膨化后的酥脆口感;
3.真空微波膨化由于其加热速度快,食品受热时间短,生产效率高,相对于传统的油炸工艺是一种革命性的取代,避免了油脂含量高,甚至会产生大量致癌物质的弊端;
4.本制备方法中无高温油炸处理,最大程度保护原料虾营养价值的流失,产品具有低脂肪、低热量、高营养等特点,符合当今人们对食品绿色健康、休闲方便的需求。
具体实施方式
下面结合具体实施例对本发明作进一步说明。
实施例1
一种即食酥脆淡水虾的制备方法,包括如下步骤:
(1)前处理:将鲜虾(南美白对虾)用水温不高于20℃的水洗净,然后去虾头、壳及肠腺,得虾仁;
(2)漂烫:将虾仁浸于1wt%的食盐溶液中,在75℃下煮制3min,然后捞出虾仁,沥干,冷却;
(3)护色处理:将漂烫后的虾仁置于茶多酚和植酸的混合溶液中浸泡6min,然后捞出,沥干;所述茶多酚和植酸的混合溶液中,茶多酚的质量浓度为0.1%,植酸的质量浓度为0.15%。
(4)真空浸渍:将经过护色处理的虾仁置于2倍虾仁重量的调味液中真空浸渍30-60min,真空浸渍的真空度为90Pa,然后过滤;
所述调味液为调味品加入20倍调味品重量的水煮沸2h熬制而成,所述调味品包括如下重量份组分:食盐5份,糖1份,花椒1份,大蒜1份,生姜0.5份,料酒0.3份,八角0.2份,桂皮0.2份,小茴香0.2份,砂仁0.2份,海苔0.4份。
(5)真空冷冻:将真空浸渍后的虾仁进行真空冷冻,冷冻温度-40℃,冷冻时间30h,真空速率4L/s;
(6)热风干燥:将真空冷冻后的虾仁进行热风干燥,热风干燥的风速为1-2m/s,时间为1,干燥温度60℃;
(7)真空微波膨化:将热风干燥后的虾仁在真空微波设备中进行真空微波膨化(真空度90Pa,功率600w,微波时间2min),然后冷却,最后进行定量充氮包装,即得海苔风味的酥脆淡水虾。
实施例2
一种即食酥脆淡水虾的制备方法,包括如下步骤:
(1)前处理:将鲜虾(罗氏沼虾)用水温不高于20℃的水洗净,然后去虾头、壳及肠腺,得虾仁;
(2)漂烫:将虾仁浸于1.5wt%的食盐溶液中,在75℃下煮制4min,然后捞出虾仁,沥干,冷却;
(3)护色处理:将漂烫后的虾仁置于茶多酚和植酸的混合溶液中浸泡8min,然后捞出,沥干;所述茶多酚和植酸的混合溶液中,茶多酚的质量浓度为0.1%,植酸的质量浓度为0.15%。
(4)真空浸渍:将经过护色处理的虾仁置于4倍虾仁重量的调味液中真空浸渍45min,真空浸渍的真空度为90Pa,然后过滤;
所述调味液为调味品加入20倍调味品重量的水煮沸2h熬制而成,所述调味品包括如下重量份组分:食盐5份,糖1份,花椒1份,大蒜1份,生姜0.5份,料酒0.3份,八角0.2份,桂皮0.2份,小茴香0.2份,砂仁0.2份,咖喱0.4份。
(5)真空冷冻:将真空浸渍后的虾仁进行真空冷冻,冷冻温度-40℃,冷冻时间35h,真空速率4L/s;
(6)热风干燥:将真空冷冻后的虾仁进行热风干燥,热风干燥的风速为1-2m/s,时间为1h,干燥温度60℃;
(7)真空微波膨化:将热风干燥后的虾仁在真空微波设备中进行真空微波膨化(真空度90Pa,功率600w,微波时间2min),然后冷却,最后进行定量充氮包装,即得咖喱风味的酥脆淡水虾。
实施例3
一种即食酥脆淡水虾的制备方法,包括如下步骤:
(1)前处理:将鲜虾(南美白对虾)用水温不高于20℃的水洗净,然后去虾头、壳及肠腺,得虾仁;
(2)漂烫:将虾仁浸于2wt%的食盐溶液中,在75℃下煮制5min,然后捞出虾仁,沥干,冷却;
(3)护色处理:将漂烫后的虾仁置于茶多酚和植酸的混合溶液中浸泡10min,然后捞出,沥干;所述茶多酚和植酸的混合溶液中,茶多酚的质量浓度为0.1%,植酸的质量浓度为0.15%。
(4)真空浸渍:将经过护色处理的虾仁置于3倍虾仁重量的调味液中真空浸渍30-60min,真空浸渍的真空度为90Pa,然后过滤;
所述调味液为调味品加入20倍调味品重量的水煮沸2h熬制而成,所述调味品包括如下重量份组分:食盐5份,糖1份,花椒1份,大蒜1份,生姜0.5份,料酒0.3份,八角0.2份,桂皮0.2份,小茴香0.2份,砂仁0.2份,辣椒0.4份。
(5)真空冷冻:将真空浸渍后的虾仁进行真空冷冻,冷冻温度-40℃,冷冻时间30h,真空速率4L/s;
(6)热风干燥:将真空冷冻后的虾仁进行热风干燥,热风干燥的风速为1-2m/s,时间为1h,干燥温度60℃;
(7)真空微波膨化:将热风干燥后的虾仁在真空微波设备中进行真空微波膨化(真空度90Pa,功率600w,微波时间2min),然后冷却,最后进行定量充氮包装,即得香辣风味的酥脆淡水虾。
实施例4
一种即食酥脆淡水虾的制备方法,包括如下步骤:
(1)前处理:将鲜虾(罗氏沼虾)用水温不高于20℃的水洗净,然后去虾头、壳及肠腺,得虾仁;
(2)漂烫:将虾仁浸于1wt%的食盐溶液中,在75℃下煮制3min,然后捞出虾仁,沥干,冷却;
(3)护色处理:将漂烫后的虾仁置于茶多酚和植酸的混合溶液中浸泡6min,然后捞出,沥干;所述茶多酚和植酸的混合溶液中,茶多酚的质量浓度为0.1%,植酸的质量浓度为0.15%。
(4)真空浸渍:将经过护色处理的虾仁置于3倍虾仁重量的调味液中真空浸渍40min,真空浸渍的真空度为90Pa,然后过滤;
所述调味液为调味品加入20倍调味品重量的水煮沸2h熬制而成,所述调味品包括如下重量份组分:蜂蜜1份,糖5份,食盐1.5份,生姜1份,料酒0.5份,桂皮0.5份,红茶0.5份。
(5)真空冷冻:将真空浸渍后的虾仁进行真空冷冻,冷冻温度-40℃,冷冻时间30h,真空速率4L/s;
(6)热风干燥:将真空冷冻后的虾仁进行热风干燥,热风干燥的风速为1-2m/s,时间为1h,干燥温度60℃;
(7)真空微波膨化:将热风干燥后的虾仁在真空微波设备中进行真空微波膨化(真空度90Pa,功率600w,微波时间2min),然后冷却,最后进行定量充氮包装,即得蜂蜜风味的酥脆淡水虾。
经理化检测,本发明的虾仁产品,水分6.17%,色泽亮红,光泽度好,虾体完整,口感酥脆,感官评分7.81;蛋白质51.2%,灰分2.02%,粗脂肪0.45%。
对比例1
一种风味即食虾干的制备方法,包括如下步骤:
(1)前处理:青虾去头、壳后抽去肠线,洗净沥干;
(2)腌制:将虾仁与腌制辅料按比例混合均匀,置于4℃条件下腌制24h,每4h翻动一次;
(3)熟制:将腌制好的虾仁放在80℃水浴锅中熟制12min,待虾仁变为鲜亮的虾红色时取出;
(4)烘干:将熟制后的虾仁放置在在55±1℃烘箱内烘制4h,指水分含量约30%以下;
(5)包装:采用真空封口包装,真空度为0.1MPa。
步骤(2)中腌制辅料有五香型和麻辣型两种:
五香型:食盐2.7%,味精0.6%,酱油1%,白砂糖1.5%,白酒0.5%,五香粉1%,老姜1%。
麻辣型:食盐3%,味精0.5%,酱油2%,白砂糖0.5%,花雕酒1%,五香粉0.2%,老姜1%,辣椒粉1.5%,花椒粉0.2%,芝麻油0.5%,月桂0.2%,大蒜粉0.5%,豆蔻0.1%,草果0.1%。
以此方法加工即食虾仁干,水分28.47%,色泽暗红,组织紧密,有嚼劲,感官评分4.53。产品理化检测结果为,蛋白质41.07%,灰分2.92%,粗脂肪0.45%。
对比例2
一种油炸虾仁的制备方法,包括如下步骤:
(1)前处理:青虾去头、壳后抽去肠线,洗净沥干;
(2)腌制:将虾仁与腌制辅料按比例混合均匀,置于4℃条件下腌制24h,每4h翻动一次;
(3)预风干:将腌制后的虾仁进行热风干燥,温度55-65℃,时间1h;
(4)油炸:将预风干后的虾仁放入油锅进行油炸,时间90s;虾仁与大豆油质量比为1:10,油炸温度约180℃;
(5)二次调味:1kg油炸虾仁中拌入10g麻辣粉。
步骤(2)中:腌制液配方为2.5%白砂糖,0.25%味精,5%葱,2.5%姜,2%花椒,1.5%八角,1.5%桂皮,2%辣椒,0.02%茶多酚。
实施例及对比例的虾仁产品的感官评价结果见下表:
实施例及对比例的虾仁产品的感官评价
由上表的评价结果可以看出,与传统的虾仁产品相比,本发明的虾仁产品保留了原料虾的色泽,并且口感酥脆,无腥味,健康营养。
Claims (6)
1.一种即食酥脆淡水虾的制备方法,其特征在于,包括如下步骤:
(1)前处理:将鲜虾用水温不高于20℃的水洗净,然后去虾头、壳及肠腺,得虾仁;
(2)漂烫:将虾仁浸于1-2wt%的食盐溶液中,在75±5℃下煮制2-5min,然后捞出虾仁,沥干,冷却;
(3)护色处理:将漂烫后的虾仁置于茶多酚和植酸的混合溶液中浸泡5-10min,然后捞出,沥干;
(4)真空浸渍:将经过护色处理的虾仁置于2-4倍虾仁重量的调味液中真空浸渍30-60min,然后过滤;
(5)真空冷冻:将真空浸渍后的虾仁进行真空冷冻,冷冻温度-40℃,冷冻时间25-40h,真空速率4L/s;
(6)热风干燥:将真空冷冻后的虾仁进行热风干燥,干燥温度55-65℃;
(7)真空微波膨化:将热风干燥后的虾仁在真空微波设备中进行真空微波膨化,然后冷却,最后进行定量充氮包装,即得。
2.如权利要求1所述的即食酥脆淡水虾的制备方法,其特征在于,步骤(3)中,茶多酚和植酸的混合溶液中,茶多酚的质量浓度为0.1%,植酸的质量浓度为0.15%。
3.如权利要求1所述的即食酥脆淡水虾的制备方法,其特征在于,步骤(4)中,真空浸渍的真空度为80-100Pa。
4.如权利要求1所述的即食酥脆淡水虾的制备方法,其特征在于,步骤(4)中,所述调味液为调味品加入20倍调味品重量的水煮沸2h熬制而成,所述调味品包括如下重量份组分:食盐1-5份、糖1-5、花椒0-2份、大蒜0-2份、生姜0.5-2份、料酒0.2-1份、八角0-0.5份、桂皮0-0.5份、小茴香0-0.5份、砂仁0-0.5份、海苔0-0.5份、咖喱0-0.5份、辣椒0-0.5份、蜂蜜0-1.5份、红茶0-1份。
5.如权利要求1所述的即食酥脆淡水虾的制备方法,其特征在于,步骤(6)中,热风干燥的风速为1-2m/s,时间为1-3h。
6.如权利要求1至5任一项所述的即食酥脆淡水虾的制备方法,其特征在于,步骤(7)中,真空微波膨化的真空度80-100Pa,功率600w,微波时间2-5min。
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