CN108477603A - 一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法 - Google Patents
一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法 Download PDFInfo
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Abstract
一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法,属于保健食品的加工技术领域。本发明以喷雾干燥所得麦苗粉为原料,通过臭氧协同射频杀菌,添加抗氧化物质并联合惰性气体保护和低温保藏的速溶调理麦苗粉,具体包括除杂、组方、装载、通入臭氧及变速搅拌、两波段射频杀菌、自然冷却、分装、惰性气体保护,密封、避光低温贮藏等步骤。本发明采用臭氧结合射频杀菌技术和两波段射频变频杀菌技术,杀菌时间短,营养素及功能成分损失小;合理添加抗氧化物质杨梅多酚,保持麦苗粉的超氧化物歧化酶和叶绿素、黄酮等的高活性;通入混合惰性气体,避免了超氧化物歧化酶、麦绿素、黄酮等营养组分氧化失活,杀菌后抗氧化活性保存率均在90%上。
Description
技术领域
本发明涉及一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法,具体涉及一种以幼年大麦叶汁喷雾干燥所得麦苗粉为主要原料,通过臭氧协同射频杀菌后,添加抗氧化物质杨梅多酚保护超氧化酶,并通入惰性气体下,避光低温贮藏的速溶调理麦苗粉保健食品的方法,属于保健食品的加工技术领域。
背景技术
麦苗粉是以麦苗嫩茎叶加工而成,富含植物黄铜、活性酶SOD、叶绿素、蛋白质、氨基酸、维生素和矿物质等。这种复合营养产品是能提高免疫功能增强剂,其中SOD、黄酮、叶绿素是麦苗粉关键组分,在抗氧化方面起到主要作用。通过榨汁、喷雾干燥的麦苗粉颗粒小,更容易被人体吸收,口感更加细腻;纳米锌联合射频杀菌,更大程度降低了杀菌的强度,产品SOD及叶绿素黄酮的含量高,更利于提高人体免疫力。
喷雾干燥是传统干燥技术,通过其包埋作用及杨梅多酚发挥了对SOD活力最大程度的保护,提高了SOD的活力的稳定性;臭氧协同射频巴氏杀菌,具有杀菌的高效性和节能型性,大大降低了杀菌的时间及温度,提高麦苗粉的品质,保持超氧歧化酶的活力。除去氧气充入氮气避光低温贮藏,有助于超氧歧化酶及黄酮叶绿素免受破坏、综合稳定了麦苗粉的抗氧化性,所得产品营养均衡。
张慜、高玉静和陈卫平(专利申请号201110395050.0)公开了一种促进鱼粒酱风味保藏的柔性杀菌方法。添加80-100nm的纳米银和55-80nm纳米锌,在90℃下杀菌10min,使得保质期达到12月。纳米锌的添加量为0.1-0.15mg/kg,纳米银添加量为0.10-0.13mg/kg。本发明与其杀菌保留不同之处为采用臭氧协同射频杀菌的柔性杀菌方法,并且利用组合惰性气体对产品贮藏。
陈石良(专利申请号201610749082.9)公开了一种抗氧化SOD口腔喷雾剂及制备方法。通过SOD、维生素C、绿茶提取物和海藻糖相互保护,相互协同,设下粘膜直接吸收,服用方便,大大提高SOD的利用效率。口腔喷剂含SOD1.0-2.0%,维生素C 1.0-5.0%,海藻糖1.0-3.5%,绿茶提取物0.2-1.0%。本发明与其不同之处为采用抗氧化物质和惰性气体对麦苗粉保护。
张慜、徐继承等(专利申请号201610821923.2)公开了一种低场核磁结合电子鼻确定柔性杀菌调理果蔬菜肴保质期的方法。利用射频杀菌技术杀菌,结合核磁水分测量建立动力学模型即果蔬菜肴保质期模型。该专利在4℃-28℃范围内,可以快速预测出货架期,为生产提供便利。射频杀菌条件,极板间距12cm,功率6kW。本发明与其不同之处为射频极板间距为14、13、11cm;使用辅助热气流温度为55℃。
邵承斌等(中国专利申请号200410040600.7)公开了一种用于防治胰岛素抵抗综合症的麦苗粉及其制备工艺。将洗净消毒的麦苗榨汁过滤后,在滤液中添加茶多酚和稻草灰提取液,滤渣用乙醇萃取两次获得萃取滤液,再将所有滤液合并,在低温下静置沉降分离制得麦绿素膏,最后添加黄氏浸、甘草浸膏、β-环糊精和葛根粉,经过真空干燥、喷雾干燥或冷冻干燥,再研磨获得产品。
李季(专利申请号201611084065.4)公开了一种越冬大麦益生元复合粉剂的制备工艺。将越冬大麦嫩叶粉碎后加入奶粉浸泡,然后加入白芷浸泡后打浆,打浆后的汁液喷雾干燥,所得产品与益生元、麦芽糖等组方。本益生元复合粉具有抑制有害菌,天界肠道菌落平衡,调节血脂等功效。
顾守智等(中国专利申请号200810060880.6)公开了一种麦绿素配方及其制剂工艺。将82%~95%麦绿素粉,5%~18%食用仙人掌提取物混合再经压片制成片剂,其中麦绿素粉是新鲜大麦嫩叶提取物。
顾振新等(中国专利申请号201110446292.8)公开了一种复配型麦绿素固体饮料及其生产工艺。以金针菇提取液进行生物护绿的新鲜麦苗汁液,经真空冷冻干燥制得的麦绿素粉为主要原料,添加麦苗渣粉、螺旋藻粉、黄原胶、山梨糖醇、海藻酸钠、麦芽糊精、羧甲基纤维素钠,经灭菌和包装工序后制得。
张慜和徐继承等(201610824919.5)公开了一种延长葛仙米低温优质货架期的柔性杀菌方法。本发明采用低酸保鲜液和射频-热风联合杀菌,真空封装后,可延长货架期9个月以上,硬度在350g以上,色泽b*在2以上。成品总菌落数≤1000CFU/g,沙门氏菌等致病菌未检出。本发明与其不同之处为在射频-热风联合的基础上增加了臭氧处理的杀菌协同效应。
张秋英等人(2009)研究了麦苗营养对人体健康方面的作用,结果显示,麦苗粉能有效的改善睡眠,提高免疫力,修复记忆力,促进伤口愈合,增强体力,缓解人体各种不适反应,增进机体排毒,延缓人体衰老。尤其对于年龄较大、亚健康体质或身体健康出现问题的人群,效果更加明显。并且长期坚持每天口服少量麦苗粉,发现其对人体产生毒副作用。
张慜和徐继承等(专利申请号20160010015.5)公开了一种小包装根茎类鲜切蔬菜的柔性杀菌方法。蔬菜在100mg/L次氯酸钠浸泡3-5min,加入纳米锌,通过射频联合热风处理,货架期达到9个月。纳米锌质量浓度0.1%,SO6B型射频杀菌设备,极板16cm,功率6kW。本发明与其不同之处为产品在干燥状态下进行臭氧协同射频杀菌;射频的极板间距为11-14cm之间。
周建贺等(中国专利申请号201210397017)公开了一种麦苗粉与食用菌粉复合的咀嚼片制备及中短波红外干燥的方法。以大麦苗粗粉经超微粉碎得麦苗微粉,以麦苗微粉和食用菌细粉为主要原料,经湿法制粒、脱模、中短波红外干燥、被膜、再中短波红外干燥,包装制得麦苗粉与食用菌粉复合的咀嚼片。
张慜和王琳等(专利申请号201610009458.2)公开了一种射频热风联合对食鱼糜制品的柔性杀菌方法。将鱼糜放置射频工作腔内的聚醚亚胺介质块上,直接射频-热风联合杀菌。所得鱼糜能够较好的保持风味、质构、色泽和营养,常温保质期可达9个月以上,市场前景广阔。
张慜、杨帆里、杨朝晖(申请号:201710028400.7)公开一种利用联合柔性杀菌延长调理八宝鸭货架期的方法,本发明在八宝鸭馅心制作过程中添加含丁香/肉桂/洋葱复合提取物的纳米防腐剂,熟制后再使用蒸煮袋真空包装八宝鸭,将包装八宝鸭置于射频工作腔内加热杀菌,然后进行短时高温高压杀菌,快速冷却。经柔性杀菌后八宝鸭鸭体及馅心的色香味形的品质保存率分别达到90%、88%,并在不添加人工防腐剂的前提下,达到了商业无菌,显著延长了产品的优质货架期,夏季室温(25-35℃)优质货架期可达到60d,低温(4℃)优质货架期可达到180d。本发明与上述发明区别是采用臭氧协同射频杀菌,和惰性气体贮藏。
张慜、王婧宇、孙磊、王向连、刘春泉(申请号:201710098334.0)公开一种采用巴氏杀菌结合纳米氧化锌抑菌和射频杀菌延长盐水鹅保质期的方法,本发明鹅肉经过低温巴氏杀菌,在真空包装前,先添加纳米氧化锌抑菌,真空包装后再进行射频杀菌。该方法又避免了使用高温高压杀菌对鹅肉品质破坏较大的问题,可以延长盐水鹅的25℃室温保质期至5-6个月,4℃低温保质期至11-12个月,同时最大限度的保证了鹅肉的品质,使风味、色泽、味道、质地的保存率分别达到93%左右。本发明与该发明的区别在于臭氧协同杀菌,辅助热气流及惰性气体低温贮藏。
以上主要是利用联合协同柔性杀菌技术处理麦苗粉,而本专利通过臭氧协同杀菌和惰性气体保护等方法,保护了麦苗粉的品质及超氧崎化酶(SOD)的活性。
发明内容
本发明的目的是降低麦苗粉杀菌的强度,提高其品质营养价值,保持SOD的活性,利用臭氧协同射频杀菌技术,添加SOD活性保护剂杨梅多酚,采用组方惰性气体保护,避光低温贮藏保持超氧化物歧化酶活性的速溶调理麦绿粉产品。
本发明的技术方案:
一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法,其特征在于,该方法包括除杂、组方、装载、通入臭氧及变速搅拌、两波段射频杀菌、自然冷却、分装、惰性气体保护、密封和避光低温贮藏,具体步骤如下:
(1)除杂:将幼年大麦茎叶汁进行喷雾干燥处理得到麦苗粉,将10-20μm的麦苗粉除去金属杂质;
具体过程如下:将麦苗粉平铺在振筛的进料托盘上;麦苗粉通过直径为3cm的磁力吸附通道进入筛网,筛网在振动频率为30Hz下,震动1-2min,吸附除去麦苗粉中的金属杂质,随后收集;振筛呈直径2m的圆形,振筛上钢网的开孔率为0.8,孔径为1mm;
(2)组方:向步骤(1)收集的麦苗粉中加入抗氧化物质杨梅多酚及营养物质,抗氧化物质杨梅多酚的含量为0.5-1.5%;加入后用搅拌机混合均匀,先在转速100rpm下搅拌1-2min,然后在300rpm下搅拌10-20s;其中,搅拌机功率为700W,转速为10-500rpm;
(3)装载:将步骤(2)所得麦苗粉装入容器中,容器口塞上双孔聚氟乙烯塞子;其中,容器直径为30cm,高度为8cm;
(4)通入臭氧及变速搅拌:连接好臭氧发生器和塞子,向步骤(3)容器中通入臭氧并同时搅拌,在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s;然后以30-50rpm的搅拌速度搅拌20-60s;其中,臭氧浓度为10-20ppm,充气速度为1-3ml/s;
(5)两波段射频杀菌:对步骤(4)臭氧处理的麦苗粉进行两波段射频杀菌处理,先在27.12MHz下杀菌3-10min,然后在40.68MHz下杀菌2-15min;其中,射频极板间距为12-14cm,辅助气流热温度为45-55℃;
(6)自然冷却:将步骤(5)杀菌过的麦苗粉自然冷却至室温;
(7)分装:在无菌条件下,将冷却后的麦苗粉称量后分装于锡箔袋中;(8)惰性气体保护:从锡箔袋底部缓慢充入复合惰性气体,用复合惰性气体置换出袋中氧气;
(9)密封:经复合惰性气体置换后,立即热塑封装密封;
(10)避光低温贮藏:将步骤(7)所得麦苗粉,在0-15℃下避光贮藏。
步骤(4)和步骤(5)组合处理的方式分为三种情况,具体为:
大距离臭氧协助射频杀菌:步骤(5)中,当射频极板间距为14cm时,先在27.12MHz下杀菌5min,然后在48.68MHz下杀菌10min,辅助气流热温度为55℃;步骤(4)中,麦苗粉在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s,然后以20-50rpm的搅拌速度搅拌20-60s,臭氧浓度为20ppm,充气流速度为1-3ml/s;
中距离臭氧协助射频杀菌:步骤(5)中,当射频极板间距为13cm时,先在27.12MHz下杀菌5min,然后在48.68MHz下杀菌8min,辅助气流热温度为55℃;步骤(4)中,麦苗粉在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s,然后以20-50rpm的搅拌速度搅拌20-60s,臭氧浓度为15ppm,充气速度为1-3ml/s;
小距离臭氧协助射频杀菌:步骤(5)中,当射频极板间距为12cm时,先在27.12MHz下杀菌5min,然后在48.68Mhz下杀菌5min,辅助热气流热温度为55℃;步骤(4)中,,麦苗粉在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s,然后以20-50rpm的搅拌速度搅拌20-60s,臭氧浓度为10ppm,气流速度为1-3ml/s;
制得的麦苗粉中叶绿素含量、总黄酮含量和SOD活力具体为:采用大距离臭氧协助射频杀菌时制得的麦苗粉中:叶绿素含量范围500~550mg/100g,总黄酮含量范围450~480mg/100g,SOD活力300-380U/mg,维生素C 0.5%,与杀菌前相比,保存率均高于93%。
采用中距离臭氧协助射频杀菌时制得的麦苗粉中:叶绿素含量范围500~540mg/100g,总黄酮含量范围470~510mg/100g,SOD活力290-380U/mg,维生素C 1%,与杀菌前相比,保存率均高于90%。
采用小距离臭氧协助射频杀菌时制得的麦苗粉中:叶绿素含量范围500~530mg/100g,黄酮含量范围450~510mg/100g,SOD活力250-380U/mg,维生素C 2%,与杀菌前相比,保存率均高于90%。
以体积比计,步骤(7)的复合惰性气体配方为:
高氮气惰性气体配方:氮气:氩气=9:1,氮气、氩气纯度均≥99.5%。
中氮气惰性气体配方:氮气:氩气=8:2,氮气、氩气纯度均≥99.5%。
低氮气惰性气体配方:氮气:氩气=6:4,氮气、氩气纯度均≥99.5%。
本发明的有益效果:
(1)与传统提取方法相比,采用喷雾干燥制造麦苗粉,干燥时间短,营养素高、功能成分损失小。
(2)与传统的热杀菌相比,采用了射频杀菌和抑菌纳米锌物质方法,其对营养成分和SOD的活力破坏降低,保持好的品质。
(3)根据不同人群的需求,添加一些辅料,不仅提高了麦苗粉的品质,还使产品更加具有针对性,提高产品的附加值。
(3)添加了抗氧化物质杨梅多酚,保持了SOD活力,提高了产品的功能效果,更能提高人体的免疫力。
具体实施方式
以下结合具体实施方式对本发明做进一步说明。
实施例1大距离臭氧协助射频杀菌及高氮气惰性气体保护的杀菌保藏方法
取1kg喷雾干燥麦苗粉,平铺磁选振筛机上,在30Hz震动频率下,震动2min,收集麦苗粉。添加抗氧化物质杨梅多酚的含量为0.5%;组方后用搅拌机混合均匀,100rpm搅拌时间1.5min,300rpm搅拌20s。在25℃室温下,装入杀菌玻璃容器,塞上聚氟乙烯塞子。用皮管连接好臭氧发生器和杀菌塞子,皮管直径0.5cm,长度1m;搅拌且同时通入臭氧;臭氧浓度20ppm,进气速度3ml/s,搅拌速度20rpm,搅拌时间30s,然后搅拌速度40rpm,搅拌时间30s。搅拌后用塞子密封玻璃容器,设置辅助热气流温度55℃,在27.12MHz射频杀菌7min,然后在40.78MHz射频杀菌8min;射频极板间距14cm,功率6kW;干燥腔中自然冷却后,分装于锡箔袋子中;从锡箔密封袋的底部缓慢配方惰性气体,并迅速热塑密封;气体气流量1ml/s,时间10s;气体组方:氮气:氩气=90:10(体积比),氮气、氩气纯度均≥99.5%。杀菌后,每袋100g的产品避光低温贮藏,保质期12月以上。
叶绿素含量范围500~550mg/100g,总黄酮含量范围450~480mg/100g,SOD活力370U/mg,维生素C 0.5%,与杀菌前相比,叶绿素、黄酮和超氧崎化酶的抗氧化活性保存率均高于93%。此产品颜色翠绿,有浓烈的麦清香,颗粒均匀,在30℃水中,20s内快速溶解,无任何沉淀,麦汁汤有光泽。
实施例2中距离臭氧协助射频杀菌及高氮气惰性气体保护的杀菌保藏方法
取2kg喷雾干燥麦苗粉,平铺磁选振筛机上,在30Hz震动频率下,震动2min,收集麦苗粉。添加抗氧化物质杨梅多酚的含量为1.0%;组方后用搅拌机混合均匀,100rpm搅拌时间2min,300rpm搅拌15s。在25℃室温下,装入杀菌玻璃容器,塞上聚氟乙烯塞子。用皮管连接好臭氧发生器和杀菌塞子,皮管直径0.5cm,长度1m;搅拌且同时通入臭氧;臭氧浓度15ppm,进气速度3ml/s,搅拌速度10rpm,搅拌时间30s,50rpm搅拌30s。然后拔掉搅拌辅助及通气管用胶塞密封样品于玻璃容器中。然后设置辅助热气流温度50℃,在27.12MHz射频杀菌5min,然后在40.78MHz射频杀菌5min;射频极板间距13cm,功率6kW;干燥腔中自然冷却后,分装于锡箔袋中;从锡箔密封袋的底部缓慢配方惰性气体,并迅速热塑密封;气体气流量1ml/s,时间10s;气体组方:氮气:氩气=90:10(体积比),氮气、氩气纯度均≥99.5%。杀菌后,每袋100g的产品避光低温贮藏,保质期12月以上。
叶绿素含量范围500~540mg/100g,总黄酮含量范围470~510mg/100g,SOD活力350U/mg,维生素C 1%。与杀菌前相比,叶绿素、黄酮和超氧崎化酶的抗氧化活性保存率均高于90%;产品可快速(10s)溶解分散在50℃的温水中,无结块,无明显沉底现象。
实施例3:小距离臭氧协助射频杀菌及高氮气惰性气体保护的杀菌保藏方法
取1.5千克喷雾干燥麦苗粉,平铺于磁选振筛机上,在30Hz震动频率下,振筛2min,收集麦苗粉。添加抗氧化物质杨梅多酚的含量为1.5%;组方后用搅拌机混合均匀;100rpm搅拌时间1.5min,300rpm搅拌20s。在25℃室温下,装入杀菌玻璃容器,塞上聚氟乙烯塞子。用皮管连接好臭氧发生器和杀菌塞子,皮管直径0.5cm,长度1m;搅拌同时通入臭氧;臭氧浓度10ppm,进气速度3ml/s,搅拌速度20rpm,搅拌时间30s,然后搅拌速度40rpm,搅拌30s。变速搅拌后封口射频杀菌,设置辅助热气流温度55℃,在27.12MHz射频杀菌4min,然后在40.78MHz射频杀菌4min;射频极板间距12cm,功率6kW;自然冷却后,分装于锡箔袋中;从锡箔密封袋的底部缓慢配方惰性气体,并迅速热塑密封;气体气流量1ml/s,时间10s;气体组方:氮气:氩气=90:10(体积比),氮气、氩气纯度均≥99.5%。杀菌后,每袋100g的产品避光低温贮藏,保质期12月以上。
叶绿素含量范围500~530mg/100g,黄酮含量范围490~510mg/100g,SOD活力330U/mg,维生素C 2%,与杀菌前相比,叶绿素、黄酮和超氧崎化酶的抗氧化活性保存率均高于90%;产品颜色翠绿,麦苗香气浓烈,口感润滑清凉,在30℃温度下,10s能全部溶解,无沉淀。
Claims (6)
1.一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法,其特征在于,具体步骤如下:
(1)除杂:将幼年大麦茎叶汁进行喷雾干燥处理得到麦苗粉,将10-20μm的麦苗粉除去金属杂质;
(2)组方:向步骤(1)收集的麦苗粉中加入抗氧化物质杨梅多酚及营养物质,抗氧化物质杨梅多酚的含量为0.5-1.5%;加入后用搅拌机混合均匀,先在转速100rpm下搅拌1-2min,然后在300rpm下搅拌10-20s;其中,搅拌机功率为700W,转速为10-500rpm;
(3)装载:将步骤(2)所得麦苗粉装入容器中,容器口塞上双孔聚氟乙烯塞子;其中,容器直径为30cm,高度为8cm;
(4)通入臭氧及变速搅拌:连接好臭氧发生器和塞子,向步骤(3)容器中通入臭氧并同时搅拌,在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s;然后以30-50rpm的搅拌速度搅拌20-60s;其中,臭氧浓度为10-20ppm,充气速度为1-3ml/s;
(5)两波段射频杀菌:对步骤(4)臭氧处理的麦苗粉进行两波段射频杀菌处理,先在27.12MHz下杀菌3-10min,然后在40.68MHz下杀菌2-15min;其中,射频极板间距为12-14cm,辅助气流热温度为45-55℃;
(6)自然冷却:将步骤(5)杀菌过的麦苗粉自然冷却至室温;
(7)分装:在无菌条件下,将冷却后的麦苗粉称量后分装于锡箔袋中;
(8)惰性气体保护:从锡箔袋底部缓慢充入复合惰性气体,用复合惰性气体置换出袋中氧气;
(9)密封:经复合惰性气体置换后,立即热塑封装密封;
(10)避光低温贮藏:将步骤(7)所得麦苗粉,在0-15℃下避光贮藏。
2.根据权利要求1所述的一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法,其特征在于,步骤(4)和步骤(5)组合处理的方式分为三种情况,具体为:
大距离臭氧协助射频杀菌:步骤(5)中,当射频极板间距为14cm时,先在27.12MHz下杀菌5min,然后在48.68MHz下杀菌10min,辅助气流热温度为55℃;步骤(4)中,麦苗粉在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s,然后以20-50rpm的搅拌速度搅拌20-60s,臭氧浓度为20ppm,充气速度为1-3ml/s;
中距离臭氧协助射频杀菌:步骤(5)中,当射频极板间距为13cm时,先在27.12MHz下杀菌5min,然后在48.68MHz下杀菌8min,辅助气流热温度为55℃;步骤(4)中,麦苗粉在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s,然后以20-50rpm的搅拌速度搅拌20-60s,臭氧浓度为15ppm,充气速度为1-3ml/s;
小距离臭氧协助射频杀菌:步骤(5)中,当射频极板间距为12cm时,先在27.12MHz下杀菌5min,然后在48.68MHz下杀菌5min,辅助热气流热温度为55℃;步骤(4)中,麦苗粉在充臭氧条件下,先以10-30rpm的搅拌速度搅拌20-60s,然后以20-50rpm的搅拌速度搅拌20-60s,臭氧浓度为10ppm气流速度为1-3ml/s。
3.根据权利要求2所述的方法,其特征在于,制得的麦苗粉中叶绿素含量、总黄酮含量和SOD活力具体为:
采用大距离臭氧协助射频杀菌时制得的麦苗粉中:叶绿素含量范围500~550mg/100g,总黄酮含量范围450~480mg/100g,SOD活力300-380U/mg,维生素C 0.5%,与杀菌前相比,保存率均高于93%;
采用中距离臭氧协助射频杀菌时制得的麦苗粉中:叶绿素含量范围500~540mg/100g,总黄酮含量范围470~510mg/100g,SOD活力290-380U/mg,维生素C 1%与杀菌前相比,保存率均高于90%;
采用小距离臭氧协助射频杀菌时制得的麦苗粉中:叶绿素含量范围500~530mg/100g,黄酮含量范围450~510mg/100g,SOD活力250-380U/mg,维生素C 2%,与杀菌前相比,保存率均高于90%。
4.根据权利要求1-3任一所述的方法,其特征在于,以体积比计,步骤(7)的复合惰性气体配方为:
高氮气惰性气体配方:氮气:氩气=9:1,氮气、氩气纯度均≥99.5%;
中氮气惰性气体配方:氮气:氩气=8:2,氮气、氩气纯度均≥99.5%;
低氮气惰性气体配方:氮气:氩气=6:4,氮气、氩气纯度均≥99.5%。
5.根据权利要求1-3任一所述的方法,其特征在于,所述的除杂具体过程如下:
将10-20μm的麦苗粉平铺在振筛的进料托盘上;麦苗粉通过直径为3cm的磁力吸附通道进入筛网,筛网在振动频率为30Hz下,震动1-2min,吸附除去麦苗粉中的金属杂质,随后收集;振筛呈直径2m的圆形,振筛上钢网的开孔率为0.8,孔径为1mm。
6.根据权利要求4所述的方法,其特征在于,所述的除杂具体过程如下:将10-20μm的麦苗粉平铺在振筛的进料托盘上;麦苗粉通过直径为3cm的磁力吸附通道进入筛网,筛网在振动频率为30Hz下,震动1-2min,吸附除去麦苗粉中的金属杂质,随后收集;振筛呈直径2m的圆形,振筛上钢网的开孔率为0.8,孔径为1mm。
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