CN108125209A - 一种具有抗氧化作用的黑米花青素盐及制备方法 - Google Patents
一种具有抗氧化作用的黑米花青素盐及制备方法 Download PDFInfo
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Abstract
本发明涉及一种具有抗氧化作用的黑米花青素盐及制备方法。花青素盐的粒径≤20μm,其中花青素的含量为0.09~0.5 g/100 g、氯化钠的含量为82~89 g/100 g、水不溶物的含量≤0.04 g/100 g、水分含量≤5 g/100 g。制备黑米花青素盐的操作步骤如下:(1)黑米预处理;(2)水提黑米花青素;(3)树脂纯化;(4)离心纳滤;(5)微胶囊溶液制备;(6)喷雾干燥;(7)包装、成品。本发明制备的黑米花青素盐产品,不仅充分利用了原料中生理活性物质的功效,发挥其保健功能,有利于人体的身体健康,还采用了喷雾干燥技术对花青素进行微胶囊化,减少了花青素在产品制备过程中的损耗,提高了其稳定性。花青素盐产品的开发拓宽了花青素和食盐的应用范围。
Description
技术领域
本发明属于食品加工技术领域,具体涉及一种黑米花青素盐及制备方法。
背景技术
花青素是一类广泛存在于自然界植物中的水溶性天然色素,属类黄酮化合物,也是植物呈色的主要物质。近年来,国内外对花青素的生理功能进行了大量的研究,且取得了丰硕的研究成果。研究发现,经常食用花青素可明显改善视力、缓解肝功能障碍、抑制肿瘤活性、减缓老年斑的沉积,而且具有抗氧化延缓衰老的生理功能。同时,花青素还是一种天然色素,相比于人工色素而言,对人体无副作用,大量开发花青素产品,不仅可满足人们对其作为保健品、化妆品及药品等的需求,而且可替代对人体有害的人工合成色素的使用。
食盐是日常生活中不可缺少的调味品,但过量摄取会危害人体健康。我国现有的食盐产品较为单一,主要是普通食盐、低钠钾盐、菇盐、椒盐等几种产品,普遍存在氯化钠含量高(≥90%),长期大量食用易造成高血压、冠心病、动脉硬化及视力下降等多种疾病的发生,严重地影响国人的身体健康。
花青素盐作为一种具有抗氧化功能的新型盐产品,不仅能够满足人体对食盐的日常生理需求,还减少了人体对钠盐的摄入,减少了用盐比例,从而降低了食盐的实际摄取量。该产品的应用,将减少消费者对食盐的摄入量,有效地预防由高钠摄入引起的高血压、动脉硬化及心脏病等疾病的发生,对社会产生积极的影响。
发明内容
为了缓解人们日常生活中过量摄入食盐引起的一系列健康问题,本发明提供一种具有抗氧化作用的黑米花青素盐,同时提供花青素盐的制备方法。
一种具有抗氧化作用的黑米花青素盐由以下质量或体积的物质,即浓度80~90%的黑米花青素浓缩液0.7~0.9 mL、食盐70~80 g、阿拉伯胶5~7 g、β-环糊精3~5 g、水80~90 g混合均匀,,喷雾干燥,制得花青素盐;
所述花青素盐的粒径≤ 20μm;
所述花青素盐中花青素的含量为0.09~0.5 g/100 g、氯化钠的含量为82~89 g/100g、水不溶物的含量≤ 0.04 g/100 g、水分含量≤ 5 g/100 g。
制备上述黑米花青素盐的操作步骤如下:
(1)黑米去杂
除去黑米中肉眼可见的杂质及霉变的黑米颗粒;
(2)黑米粉碎浸提
将除杂后的黑米粉碎,过60~100目筛;按照质量体积比为1:10~20(Kg/L)取黑米和水,用1~3%的柠檬酸溶液调节pH为2.5~6.0,在20~55℃下,浸提2~5 h,得到黑米花青素浸提液;
(3)离心分离
将黑米花青素浸提液通过离心机进行固液分离,除去淀粉、蛋白质、多糖等杂质,得到黑米花青素水提液;
(4)树脂纯化
将黑米花青素水提液通过树脂纯化,收集黑米花青素乙醇洗脱液;
(5)纳滤浓缩
将黑米花青素乙醇洗脱液通过纳滤膜浓缩,得到浓度80~90%的黑米花青素浓缩液;
(6)制备微胶囊溶液
将阿拉伯胶5~7 g和β-环糊精3~5 g溶解于80~90份水中,加浓度80~90%的入黑米花青素浓缩液0.7~0.9 mL和食盐70~80 g,高速搅拌混合均匀,得到花青素盐微胶囊溶液;
(7)微胶囊溶液的喷雾干燥
将花青素盐微胶囊溶液喷雾干燥,得到花青素盐;
(8)包装
将花青素盐冷却至室温后,包装。
进一步限定的技术方案如下:
步骤(3)中,离心分离条件为采用碟片式离心机,在7000~11000 r/min下,将黑米浸提液进行固液分离。
步骤(4)中,树脂纯化条件为将水提液通过AB-8树脂纯化,上样量为树脂体积的1~4倍,先用3~9倍柱体积的去离子水洗脱柱子,再用浓度为65~95%的乙醇洗脱,洗脱体积2~5倍柱体积,收集黑米花青素乙醇洗脱液。
步骤(5)中,纳滤浓缩条件为通过截留分子量为200~400 Da的纳滤膜浓缩,操作压力0.4~0.8 MPa,温度20~45 ℃,得到浓度80~90%的黑米花青素浓缩液。
步骤(6)中,高速搅拌混合均匀条件为9000~11000 r/min的转速下搅拌1~5min。
步骤(7)中,喷雾干燥条件为进风温度170~210 ℃,出风温度70~110 ℃,进料速度2.5~3.5 L/h。
本发明的有益技术效果体现在以下方面:
1.黑米花青素资源的产品开发
长期以来,人们对食盐的过量摄入导致了一系列的健康问题,本发明创新性地将黑米花青素和食盐结合起来,产品中不仅减少了食盐的用量,一定程度上降低了由食盐引起的高血压等疾病的发生,还添加了具有抗氧化功能的花青素,减缓衰老过程。
2.丰富了盐产品的开发
长久以来,食盐作为主要烹饪调味品,产品品种单一,精深加工产品很少。本发明利用花青素和食盐相结合的方式,弥补了其深加工产品的空白,开拓了其应用的新领域。
3.提高了花青素稳定性
花青素作为一种生物活性物质,在高温条件下易氧化变质,本发明利用阿拉伯胶和β-环糊精作为壁材,利用微胶囊技术,采用喷雾干燥法对花青素进行包埋,相对于未包埋的花青素,其稳定性提高了20%,解决了花青素在利用过程中被降解的难题。
4. 赋予产品红色、粉红色等新鲜的色泽
花青素在不同pH条件下结构不同,因此会呈现不同的颜色,特别是在酸性条件(pH﹤3.0)下呈现鲜艳的红色,通过条件的控制,可以生产出红色、淡红色等不同的产品,丰富花青素盐产品的多样性,提高盐产品的美感。
具体实施方式
下面结合实施例,对本发明作进一步地说明。
实施例1
(1)黑米去杂:除去黑米中肉眼可见的杂质及霉变的黑米颗粒;
(2)黑米粉碎,浸提:用粉碎机将(1)中除杂后的黑米进行粉碎,至物料的平均颗粒度在60目,按照质量体积比为1:10(Kg/L)取黑米和水,再用1%柠檬酸溶液调节pH为2.5,在20 ℃下,浸提2 h;
(3)离心分离:采用碟片式离心机,在7000 r/min下,将黑米浆液进行固液分离,以除去淀粉、蛋白质、多糖等杂质,得到水提液;
(4)树脂纯化:将水提液通过AB-8树脂纯化,上样量为树脂体积的1倍,先用3倍柱体积的去离子水洗脱柱子,再用浓度为65%的乙醇洗脱,洗脱体积2倍柱体积,收集黑米花青素乙醇洗脱液;
(5)纳滤浓缩:将花青素洗脱液通过截留分子量为200 Da的纳滤膜浓缩,操作压力0.4MPa,温度20 ℃,得到浓度80%的黑米花青素浓缩液;
(6)微胶囊溶液的制备:将阿拉伯胶5 g、β-环糊精3 g溶解于80 mL水中,加入浓度80%的花青素浓缩液0.7 mL、食盐70 g,在9000 r/min的转速下搅拌1 min,得到花青素盐微胶囊溶液;
(7)花青素盐微胶囊溶液的喷雾干燥:步骤(6)中均质好的花青素盐微胶囊溶液的进风温度170 ℃,出风温度70 ℃,进料速度2.5 L/h的喷雾干燥条件下喷雾干燥,得到黑米花青素盐。
黑米花青素盐的理化技术指标数据见上表。
(8)包装:步骤(7)中干燥好的花青素盐产品冷却至室温,包装。
实施例2
(1)黑米去杂:除去黑米中肉眼可见的杂质及霉变的黑米颗粒;
(2)黑米粉碎,浸提:用粉碎机将(1)中除杂后的黑米进行粉碎,至物料的平均颗粒度在100目,按照质量体积比为1: 20(Kg/L)取黑米和水,再用3%柠檬酸溶液调节pH为6.0,在55℃下,浸提5 h;
(3)离心分离:采用碟片式离心机,在11000 r/min下,将黑米浆液进行固液分离,以除去淀粉、蛋白质、多糖等杂质,得到水提液;
(4)树脂纯化:将水提液通过AB-8树脂纯化,上样量为树脂体积的4倍,先用9倍柱体积的去离子水洗脱柱子,再用浓度为95%的乙醇洗脱,洗脱体积5倍柱体积,收集黑米花青素乙醇洗脱液;
(5)纳滤浓缩:将黑米花青素乙醇洗脱液通过截留分子量为400Da的纳滤膜浓缩,操作压力0.8 MPa,温度45 ℃,得到浓度90%的花青素浓缩液;
(6)微胶囊溶液的制备:将阿拉伯胶7 g、β-环糊精5 g溶解于90 mL水中,加入浓度90%的黑米花青素浓缩液0.9 mL、食盐80 g,在11000 r/min的转速下搅拌5 min,得到花青素盐微胶囊溶液;
(7)花青素盐微胶囊溶液的喷雾干燥:步骤(6)中均质好的花青素盐微胶囊溶液的进风温度210 ℃,出风温度110 ℃,进料速度3.5 L/h的喷雾干燥条件下喷雾干燥,得到黑米花青素盐。
黑米花青素盐的理化技术指标数据见上表。
(8)包装:步骤(7)中干燥好的花青素盐产品冷却至室温,包装。
Claims (7)
1.一种具有抗氧化作用的黑米花青素盐,其特征在于:将以下质量或体积的物质,即浓度80~90%的黑米花青素浓缩液0.7~0.9 mL、食盐70~80 g、阿拉伯胶5~7 g、β-环糊精3~5 g、水80~90 g混合均匀,喷雾干燥,制得花青素盐;
所述花青素盐的粒径≤ 20μm;
所述花青素盐中花青素的含量为0.09~0.5 g/100 g、氯化钠的含量为82~89 g/100g、水不溶物的含量≤ 0.04 g/100 g、水分含量≤ 5 g/100 g。
2. 制备权利要求1所述的黑米花青素盐的方法,其特征在于操作步骤如下:
(1)黑米去杂
除去黑米中肉眼可见的杂质及霉变的黑米颗粒;
(2)黑米粉碎浸提
将除杂后的黑米粉碎,过60~100目筛;按照质量体积比为1:10~20(Kg/L)取黑米和水,用1~3%的柠檬酸溶液调节pH为2.5~6.0,在20~55℃下,浸提2~5 h,得到黑米花青素浸提液;
(3)离心分离
将黑米花青素浸提液通过离心机进行固液分离,除去淀粉、蛋白质、多糖等杂质,得到黑米花青素水提液;
(4)树脂纯化
将黑米花青素水提液通过树脂纯化,收集黑米花青素乙醇洗脱液;
(5)纳滤浓缩
将黑米花青素乙醇洗脱液通过纳滤膜浓缩,得到浓度80~90%的黑米花青素浓缩液;
(6)制备微胶囊溶液
将阿拉伯胶5~7 g和β-环糊精3~5 g溶解于80~90 g水中,加浓度80~90%的入黑米花青素浓缩液0.7~0.9 mL和食盐70~80 g,高速搅拌混合均匀,得到花青素盐微胶囊溶液;
(7)微胶囊溶液的喷雾干燥
将花青素盐微胶囊溶液喷雾干燥,得到花青素盐;
(8)包装
将花青素盐冷却至室温后,包装。
3.根据权利要求2所述的花青素盐的制备方法,其特征在于:步骤(3)中,离心分离条件为采用碟片式离心机,在7000~11000 r/min下,将黑米浸提液进行固液分离。
4.根据权利要求2所述的花青素盐的制备方法,其特征在于:步骤(4)中,树脂纯化条件为将水提液通过AB-8树脂纯化,上样量为树脂体积的1~4倍,先用3~9倍柱体积的去离子水洗脱柱子,再用浓度为65~95%的乙醇洗脱,洗脱体积2~5倍柱体积,收集黑米花青素乙醇洗脱液。
5.根据权利要求2所述的花青素盐的制备方法,其特征在于:步骤(5)中,纳滤浓缩条件为通过截留分子量为200~400 Da的纳滤膜浓缩,操作压力0.4~0.8 MPa,温度20~45 ℃,得到浓度80~90%的黑米花青素浓缩液。
6.根据权利要求2所述的花青素盐的制备方法,其特征在于:步骤(6)中,高速搅拌混合均匀条件为9000~11000 r/min的转速下搅拌1~5 min。
7.根据权利要求2所述的花青素盐的制备方法,其特征在于:步骤(7)中,喷雾干燥条件为进风温度170~210 ℃,出风温度70~110 ℃,进料速度2.5~3.5 L/h。
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