CN101035442A - 甜味剂组合物 - Google Patents

甜味剂组合物 Download PDF

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CN101035442A
CN101035442A CNA200580034359XA CN200580034359A CN101035442A CN 101035442 A CN101035442 A CN 101035442A CN A200580034359X A CNA200580034359X A CN A200580034359XA CN 200580034359 A CN200580034359 A CN 200580034359A CN 101035442 A CN101035442 A CN 101035442A
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森健一
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Ajinomoto Co Inc
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Abstract

本发明提供一种含有莫纳甜或其盐的甜味剂组合物(该甜味剂组合物在紫外光照射下或在酸性条件中均不发生分解)、一种该莫纳甜或其盐的保存稳定剂、以及一种用于保存该莫纳甜或其盐的方法。根据本发明,提供一种含有该莫纳甜或其盐和自由基净化剂等的甜味剂组合物。

Description

甜味剂组合物
                                技术领域
本发明涉及一种包含莫纳甜或其盐的甜味剂组合物。更具体地说,本发明涉及一种用于保存莫纳甜或其盐的方法。
                                技术背景
莫纳甜是从南非的北Transvaal中的天然树根(Schlerochiton ilicifolius)中分离出来的天然氨基酸衍生物,根据R.Vleggaar等人的报道可知其结构是(2S,4S)-2-氨基-4-羧基-4-羟基-5-(3-吲哚基)-戊酸((2S,4S)-4-羟基-4-(3-吲哚基甲基)-谷氨酸)(R.Vleggaar等,J.Chem.Soc.Perkin Trans.,3095-3098,(1992))。莫纳甜的合成方法如下所述,例如,ZA 87/4288、ZA 88/4220、美国专利No.5,994,559、WO03/045914、WO03/059865、WO03/056026、WO04/067494、WO04/053125、C.W.Holzapfel等,Synthetic Communications,24(22),3197-3211(1994)、K.Nakamura等,Organic Letters,2,2967-2970(2000)等。莫纳甜是优良的甜味剂,其比糖甜1400倍且不含卡路里。其是热稳定的,可以适用于各种食品。
                           发明内容
本发明人此次首度阐明呈溶液态的莫纳甜在紫外光下易于分解,并且当其处于酸性条件下时(尤其在pH值小于5时),这种趋势变得尤为明显。因而,如上所述,一种不管其处于何种条件下使用呈稳定态的优良的甜味剂莫纳甜的方法成为必需的。
本发明要解决的问题就是要解决上述新颖的问题。本发明的目的是提供一种用于保存即使在紫外光下仍处于稳定态的莫纳甜或其盐的方法,此外,还提供含有稳定的莫纳甜或其盐的甜味剂组合物、饮料、食品、药品等。另外,提供一种用于莫纳甜或其盐的保存稳定剂也是本发明的一个目的。
本发明人对此进行了深入的研究,结果发现在同时有自由基净化剂存在时保存莫纳甜或其盐,可使莫纳甜和其盐保持稳定态,由此完成了本发明。
于是,本发明如下所述。
(1)一种含有莫纳甜或其盐和自由基净化剂的甜味剂组合物。
(2)如(1)中的组合物,其中自由基净化剂选自由抗坏血酸、维生素C、抗坏血酸酯、异抗坏血酸、异抗坏血酸盐、异抗坏血酸酯、尿酸、胆红素、白蛋白、维生素A、维生素E、泛醌醇、类胡萝卜素、组氨酸、色氨酸、2,6-二叔丁基-4-甲酚、2-叔丁基-4-羟基苯甲醚、3-叔丁基-4-羟基苯甲醚、培酸丙酯和儿茶素构成的组中的至少一种。
(3)如(1)中的组合物,其中自由基净化剂选自由抗坏血酸、维生素C、抗坏血酸酯、异抗坏血酸、异抗坏血酸盐和异抗坏血酸酯构成的组中的至少一种。
(4)如(1)中的组合物,其中自由基净化剂是抗坏血酸。
(5)如(1)~(4)中任一项的组合物,是pH值不低于2且低于7的液相组合物。
(6)如(1)~(5)中任一项的组合物,其中,以100质量份的莫纳甜或其盐为基准,自由基净化剂的含量为1~10000质量份。
(7)一种含有如(1)~(6)中任一项的组合物的饮料、食品、口腔组合物或药品。
(8)一种含有如(1)~(6)中任一项的组合物的饮料。
(9)一种用于莫纳甜或其盐的保存稳定剂,其含有自由基净化剂。
(10)一种莫纳甜或其盐的保存方法,包括在有自由基净化剂存在下对莫纳甜或其盐进行保存。
(11)一种含有莫纳甜或其盐的甜味剂组合物、饮料、食品、口腔组合物或药品的保存方法,包括在有自由基净化剂存在下对莫纳甜或其盐进行保存。
(12)一种含有莫纳甜或其盐的饮料的保存方法,包括在有自由基净化剂存在下对莫纳甜或其盐进行保存。
(13)一种莫纳甜或其盐的保存方法,包括使莫纳甜或其盐处于不暴露在紫外光下的条件下。
(14)一种含有莫纳甜或其盐的甜味剂组合物、饮料、食品、口腔组合物或药品的保存方法,包括使莫纳甜或盐处于不暴露在紫外光下的条件下。
(15)一种含有莫纳甜或其盐的饮料的保存方法,包括使莫纳甜或其盐处于不暴露在紫外光下的条件下。
(16)如(13)~(15)中的保存方法,包括在有自由基净化剂存在下进行保存。
(17)一种莫纳甜或其盐,其被封装入屏蔽紫外光的容器中。
(18)一种含有莫纳甜或其盐的甜味剂组合物、饮料、食品、口腔组合物或药品,其被封装入屏蔽紫外光的容器中。
(19)一种含有莫纳甜或其盐的饮料,其被封装入屏蔽紫外光的容器中。
(20)一种含有莫纳甜或其盐、和自由基净化剂的甜味剂组合物、饮料、食品、口腔组合物或药品,其被封装入屏蔽紫外光的容器中。
(21)一种含有莫纳甜或其盐、和自由基净化剂的饮料,其被封装入屏蔽紫外光的容器中。
根据本发明,提供甜味剂组合物、食品、饮料、口腔组合物和药品,其抑制了由紫外光引起的分解受到,并且含有提供更稳定的甜味的莫纳甜或其盐。此外,根据本发明,还提供了用于莫纳甜或其盐的保存稳定剂和用于莫纳甜或其盐的保存方法。
                            具体实施方式
本发明中的甜味剂组合物含有莫纳甜和自由基净化剂。莫纳甜是由化学式(I)表示的化合物:
Figure A20058003435900061
莫纳甜在2-位置和4-位置处具有不对称的部分并且包括下述4种光学异构体。
在本发明中,对莫纳甜的立体异构体没有特别限定。根据需要,可以使用(2R,4R)莫纳甜、(2R,4S)莫纳甜、(2S,4R)莫纳甜和(2S,4S)莫纳甜、以及它们的任意混合物。除非另作说明,在本说明书中,简单的莫纳甜是指一种对立体异构体没有限定的莫纳甜。此外,本发明中的莫纳甜可以用作碱金属如钠、钾等的盐、或碱土金属如镁等的盐等。在此情况下,优选钾盐,并且进一步优选单钾盐。
根据本发明人的发现可知,4种光学异构体中的(2S,4R)莫纳甜和(2R,4S)莫纳甜在紫外光下比其它异构体更易于分解。莫纳甜为公知物质,并且它的制造方法也是公知的。例如,它能用下述方法制造,即ZA 87/4288、ZA 88/4220、美国专利5,994,559、WO03/045914、WO03/059865、WO03/056026、WO04/067494、WO04/053125、C.W.Holzapfel等,SyntheticCommunications,24(22),3197-3211(1994)、K.Nakamura等,Organic Letters,2,2967-2970(2000)等。
本发明中的自由基净化剂是指一种化合物,其用于有效地捕获反应期间产生的自由基(游离基)并且,例如,可以是上述抗坏血酸、维生素C、抗坏血酸酯、异抗坏血酸(异抗坏血酸)、异抗坏血酸盐、异抗坏血酸酯、尿酸、胆红素、白蛋白、维生素A、维生素E、泛醌醇、类胡萝卜素、组氨酸、色氨酸、2,6-二叔丁基-4-甲酚(BHT)、2-叔丁基-4-羟基苯甲醚、3-叔丁基-4-羟基苯甲醚、培酸丙酯、儿茶素等。而本发明中的自由基净化剂,优选是抗坏血酸、维生素C、抗坏血酸酯、异抗坏血酸、异抗坏血酸盐和异抗坏血酸酯。而抗坏血酸的盐或异抗坏血酸盐,可以是上述碱金属盐(例如钠盐、钾盐等)等。具体地说,优选钠盐。而抗坏血酸酯或异抗坏血酸酯,优选脂肪酸酯(例如,棕榈酸酯、硬脂酸酯等)。在本发明中,自由基净化剂尤其优选抗坏血酸。而抗坏血酸,进一步优选L-抗坏血酸(维生素C)。
只要达到本发明的效果,对本发明的甜味剂组合物中自由基净化剂的含量没有特别限定,以100质量份的莫纳甜或其盐为基准,自由基净化剂的量通常不低于1质量份,优选为不低于5质量份,进一步优选为不低于10质量份。其含量的上限没有特别限定,并且根据将使用的自由基净化剂的种类及使用甜味剂组合物的食品的种类确定其合适的量。以100质量份的莫纳甜或其盐为基准,使用的自由基净化剂的量通常不超过10000质量份,优选为不超过5000质量份。
本发明中的甜味剂组合物优选用作甜味剂,此外其可以根据需要还包含其他的任选的组份如载体、增充剂、赋形剂、添加剂、香料等。本发明中的甜味剂组合物可以含有其他的甜味剂比如糖(例如蔗糖、转化糖、异构糖、葡萄糖、果糖、乳糖、麦芽糖、海藻糖、木糖等)、糖醇(例如多糖醇(multitol)、葡糖醇、己六醇、丁四醇、木糖醇、乳糖醇等)、低聚糖、食用纤维、天冬苯丙二肽酯、邻磺酰苯酰亚胺、丁磺氨K、三氯半乳蔗糖等。
本发明中的甜味剂组合物的存在形式没有特别限定,它可以有各种存在形式如冻结干燥的产品、混合磨碎的产品、液体、乳液等。根据需要,通过本技术领域中已知的方法如干法成粒、湿法成粒等,可使作为冻结干燥的产品或混合磨碎的产品的甜味剂组合物粒化,从而制得颗粒。在液体甜味剂中,可以用水、乙醇、甘油、丙二醇等作为溶剂以溶解溶质,可进一步优选使用水和乙醇。为控制各个组份的比重,根据本技术领域中已知的方法调节上述组合物的量和将要添加的溶剂的量。
本发明中的甜味剂组合物可以用于各种产品,包括饮料、食品、药品等。具体地说,各种食品如粉状果汁、粉状可可粉、速溶咖啡、巧克力、口香糖、保健食品、面包、糕点等、以及各种饮料如咖啡饮料、蔬菜汁饮料、日本茶、中国茶、茶叶、奶制饮料、汤饮料、充气饮料、甜味饮料、果汁饮料、酒饮料等。此外,它还可以用于各种需要甜味的产品如牙膏粉、药品等。
此外,本发明还提供一种莫纳甜或其盐的保存稳定剂。保存稳定剂的特征在于,它含有自由基净化剂。该自由基净化剂和如上所述的那些相同。使用该保存稳定剂,可以抑制莫纳甜和其盐的分解,即使在紫外光下也是如此,从而使它们可以用于稳定的甜味剂组合物等。只要能实现本发明的目的,除了莫纳甜外,根据需要,还可以添加任何其他的组份如上述增充剂、赋形剂、添加剂、香料、甜味剂等。
通常,本发明中的保存稳定剂用于使莫纳甜或其盐和自由基净化剂的质量比与上述组合物中的质量比相同。
根据本发明人的发现可知,当莫纳甜以液态如水溶液等存在时,它易于在紫外光下分解,并且该趋势在酸性pH值范围内(pH值为2~7)更为明显。当pH值不超过6时,该分解尤为明显。通常,食品的pH值不低于2,并且本发明的莫纳甜的分解抑制效果和保存稳定性效果在pH值为2~7、进一步为2~6、更进一步为2~5、甚至再进一步为2~4的甜味剂组合物和食品中成为明显。因为在莫纳甜以液态如水溶液等存在时,观察到莫纳甜因紫外光引起分解,故本发明的分解抑制效果和保存稳定性效果在含有莫纳甜的饮料中表现得尤为明显。此外,本发明的分解抑制效果和保存稳定性效果可以显示在含有液态的莫纳甜的食品和药品中、在含有莫纳甜和溶解莫纳甜的溶剂的食品和药品中、以及在其内莫纳甜以液态被使用或保存的食品和药品中。此外,该分解抑制效果和保存稳定性效果可以显示在其生产过程中经由含有呈液态的莫纳甜的工序生产出来的食品和药品中。
紫外光是指波长小于可见光但大于X-射线的电磁波,其波长范围可以落在约400nm~1nm的范围内。紫外光根据其波长范围分为近紫外光400~300nm、远紫外光300~200nm和真空紫外光200~1nm。因为在不超过195nm的波长范围内观察到氧的吸收,故用于该波长范围的分光镜需要特殊的设计如真空光路等。高空大气层中的臭氧吸收波长不超过约290nm的太阳光(Tokyo Kagaku Dozin有限公司,化学百科全书,第一版第4次印刷,1998)。由随后提及的实施例中可清楚看到,具有紫外吸收薄膜的灯的光辐照几乎不分解莫纳甜,但太阳光的辐照、D65灯和近紫外灯(其波长均在紫外光区域内)均分解莫纳甜。显而易见,莫纳甜的分解可归因于波长在紫外光区域内的电磁波(假定主要为约290~400nm的波长)。
根据本发明人的发现可知,当莫纳甜以液态存在时,它在紫外光下分解,即被波长在紫外光范围内的电磁波分解,还被如太阳光的辐照分解。例如,当将其保存在紫外线屏蔽物中时,几乎观察不到分解。根据该发现,本发明还提供莫纳甜或其盐的保存方法、含有莫纳甜或其盐的甜味剂组合物的保存方法、以及含有莫纳甜或其盐的饮料、食品、口腔组合物或药品的保存方法。
第一保存方法包括在有自由基净化剂存在时对莫纳甜或其盐进行保存。通常,当莫纳甜或其盐以液态存在时,可观察到莫纳甜的分解。然而,因为莫纳甜在其以固态(如粉体等)存在时也会因吸湿等而部分变成液体从而发生分解,故本发明的保存方法可用于保持其品质。此外,任何其他的组份比如上述增充剂、赋形剂、添加剂、香料、甜味剂(不是莫纳甜)等可以同时存在。通常,本发明的保存方法应这样实施以使莫纳甜或其盐和自由基净化剂的质量比类似于上述组合物中它们的质量比。
第二保存方法包括将莫纳甜或其盐处于不暴露在紫外光的条件下。具体地说,只要不使莫纳甜和其盐暴露于紫外光下,可以采用任何方式,例如,上述提及的将它们放置于由紫外光屏蔽材料如铝等制成的容器中、用屏蔽紫外光的薄膜等裹住它们等。因此,本发明还包括使莫纳甜或其盐不暴露于紫外光下的方法,例如,在容器中的莫纳甜或其盐,其中莫纳甜或其盐封装入屏蔽紫外光的容器中;在容器中的甜味剂组合物、饮料、食品、口腔组合物或药品,其中莫纳甜或其盐封装入屏蔽紫外光的容器中。
即使在紫外光被屏蔽下保存莫纳甜等或将莫纳甜封装入屏蔽紫外光的容器中时,仍优选在有自由基净化剂存在时对莫纳甜进行保存,这是因为用户等可以在紫外光条件下使用或保存莫纳甜等。
实施例
下面参照实施例对本发明进行详细地说明。下列实施例用于说明本发明,但不能限定本发明。
下述为用于下列实施例、对照例和参照例的各种条件、光辐照条件和HPLC分析条件。
<各种条件>
使用的莫纳甜:(2R,4R)莫纳甜钾盐、(2S,4S)莫纳甜钾盐和(2S,4R)莫纳甜钾盐
保存用PET容器:Toyo Seikan Kaisha有限公司,PET瓶(型号:STHH350SA,最大容积:376ml,高度:157mm,最大直径:60mm,充液:370ml)。
<光辐照条件>
光照度:
2900-3100LUX
UV-A:0.06mW/cm2
UV-B:0.006mW/cm2
                            表1
放置条件   UV-A(360nm)   UV-B(305nm)   光照度
  mW/cm2   lux
  室外9:10   1.102   0.376   44,000
  室外13:40   1.790   0.696   72,300
  室外15:40   1.007   0.399   48,000
  近紫外光灯   0.597   0.053   23
  D65灯   0.06   0.006   2,900
  具有紫外吸收薄膜的灯   0.001   0.001   2,700
(注:室内试验台的光照度约700~1000lux)
温度:25℃的恒温室(强制循环)
设备:
光度计:Tokyo Koden有限公司的数字式光度计ANA-F11
紫外线辐射计:Topcon公司的紫外线辐射计UVR-3036/S(光接收器:UV-A(365nm)、UV-B(305nm))
灯:东芝公司制造,管直径32.5mm,管长580mm,20W(通用型)
D65荧光灯型号:FL20S.D-EDL-D65
近紫外光灯型号:FL20S.BLB
具有紫外吸收薄膜的荧光灯型号:FL20S.N-SDL-NU
(由D65荧光灯发出的光具有类似于太阳光的光谱)
<HPLC分析条件>
使用的仪器:
泵:Shimadzu公司制造的LC-9A
柱式加热炉:Shimadzu公司制造的CTO-10A
检测器:Shimadzu公司制造的SPD-10A
自动取样器:Shimadzu公司制造的SIL-9A
梯度计:Tokyo Rikakikai有限公司制造的LPG-1000
色谱柱:Shiseido有限公司制造的CAPCELL PAK C18型MG 5μm(4.6mm×250mm)
柱温:40℃
检测波长:210nm
低粘度液相组合物:
溶液A20mm KH2PO4/乙腈=100/5
溶液B仅含乙腈
梯度模式:(如表2所示)
                表2
  时间(min)   溶液A(%)   溶液B(%)
  0   100.   0
  15   100   0
  40   63   37
  45   63   37
注射体积:10μL
分析周期:70min/l个样品
<pH值测定条件>
pH计:型号HM-30G,DKK Toa公司制造
pH标准溶液:
磷酸盐pH标准溶液(JIS Z 8802)pH=7,Junsei化学有限公司制造
邻苯二甲酸酯pH标准等摩尔溶液(JIS Z 8802)pH=4,Junsei化学有限公司制造
测量方法:用自动温度校正法进行两点校正法,从而对低粘度饮料样品的pH值进行测量。
<添加自由基净化剂时莫纳甜的保存>
实施例1~9、对照例1~5及参照例1
用8N氢氧化钠调节低粘度饮料样品溶液的pH值[(柠檬酸2g,苯甲酸钠0.045g)/L溶液]。(2R,4R)莫纳甜钾盐(25mg)和各种添加剂溶于经调节的低粘度饮料样品溶液(500ml)中并充满PET容器。在参照例1中,添加L-色氨酸(25mg)而不是添加莫纳甜。在室温控制为25℃的恒温室内,将容器放在光照度调节至约3000Lux的D65荧光灯下静置约165小时。溶液同时充满20ml的螺帽状管形瓶,并放于相同的恒温室中在光屏蔽下静置同样的时间。对这些光照溶液和光屏蔽溶液进行HPLC分析,并用下述公式计算其光分解率。
光分解率(%)=[1-(光照溶液中的莫纳甜的质量百分比浓度/光屏蔽溶液中的莫纳甜的质量百分比浓度)]×100
pH值、用于各个溶液中的莫纳甜及添加剂如表3所示。结果见表3。在表3中,显而易见,莫纳甜在D65灯的包括紫外光的光辐照下的分解明显因自由基净化剂的存在而受到抑制。
如ZA 87/4288和ZA 88/4220中所描述的,莫纳甜的存在起到平衡水溶液中具有化学式(II)的内酯式和具有化学式(III)的内酰胺式的作用,并且溶液的pH值越低,内酯式与内酰胺式的含量比越易于增加。
Figure A20058003435900131
在下表中,莫纳甜的残留率(%)表示在行中的上部,内酯的保有率(%)表示在行中的左下部并且内酰胺的保有率(%)表示在行中的右下部,所有测试均在光照及光屏蔽下进行。
莫纳甜的残留率根据下列公式计算。
莫纳甜的残留率(%)=[(光照后或光屏蔽保存后莫纳甜的质量百分比浓度/(光照前或光屏蔽保存前莫纳甜的质量百分比浓度)]×100
内酯和内酰胺的保有率根据下列公式计算。
内酯和内酰胺的保有率(%)=[(光照后或光屏蔽保存后内酰胺或内酯的HPLC的峰面积)/(在样品制备后立即测得的莫纳甜的HPLC峰面积)×100。
(在样品制备后不立即观察内酯和内酰胺的HPLC峰面积)
<因pH值差异而导致的莫纳甜的光分解率的差异>
对照例6~11
按照实施例1相同的方法,所不同的只是没有添加添加剂,在此条件下测定莫纳甜的光分解率。pH值和用于各个溶液的莫纳甜如表4所示。结果见表4。在表4中,显而易见,pH值越低,莫纳甜由紫外光引起的分解越易于增加。
<具有紫外光屏蔽的莫纳甜的分解率>
实施例10~12
按照实施例1相同的方法,所不同的只是使用具有紫外吸收薄膜的荧光灯(光照时间73小时)而不是使用D65灯,在此条件下测定莫纳甜的光分解率。pH值和用于各个溶液的莫纳甜和添加剂如表5所示。结果见表5。在表5中,显而易见,当紫外光被屏蔽时,莫纳甜的分解明显受到抑制。
实施例13、对照例12~13
按照实施例1相同的方法,所不同的只是使用太阳光(光照时间14小时)而不是使用D65灯,在此条件下测定莫纳甜的光分解率。pH值和用于各个溶液的莫纳甜和添加剂如表6所示。结果见表6。在表6中,显而易见,当存在自由基净化剂时,莫纳甜由包括紫外光的太阳光引起的分解明显受到抑制。
实施例14、对照例14~15
按照实施例1相同的方法,所不同的只是使用近紫外光灯(光照时间73小时)而不是使用D65灯,在此条件下测定莫纳甜的光分解率。pH值和用于各个溶液的莫纳甜和添加剂如表7所示。结果见表7。在表7中,显而易见,当存在自由基净化剂时,莫纳甜由紫外光引起的分解明显受到抑制。
<色氨酸和莫纳甜的光分解行为对pH值的依赖性>
示例性的实施例
测试色氨酸(Trp)和莫纳甜的光分解行为对pH值的相关性。
对色氨酸,制备浓度为50ppm的溶液(25℃)。用柠檬酸缓冲液将测试的溶液调节到给定的pH值,按照与实施例1相同的方法,在此条件下对Trp和莫纳甜的光分解率进行测量。测试条件和结果如表8所示。由表8中明显看出,与在酸性区相比,Trp在中性区更易于光分解,而具有如同Trp的吲哚结构的莫纳甜的光分解行为明显不同于Trp的光分解行为,这可从莫纳甜在酸性区比中性区更易于光分解等得到证实。因此,根本不能从得知Trp的光分解特性来预测莫纳甜的光分解特性。
此外,还意外地发现,在莫纳甜中添加抗坏血酸可在很宽的pH值范围内产生相当于屏蔽的效果。
                    表3光源D65灯光照度3000lux光照时间165小时
  pH   莫纳甜   添加剂   光照   光屏蔽   光分解率
实施例1 3.1 (2R,4R)   抗坏血酸25mg(50ppm)   71.3%(25.7%,1.2%)   64.0%(23.2%,1.7%) -11.5%
实施例2 3.1 (2R,4R)   抗坏血酸0.25mg(0.5ppm)   54.6%(16.6%,0.1%)   76.9%(20.8%,1.0%) 29.1%
实施例3 3.1 (2R,4R)   抗坏血酸2.5mg(5ppm)   75.0%(21.2%,0.9%)   74.4%(25.1%,1.8%) -0.9%
实施例4 3.1 (2R,4R)   抗坏血酸250mg(500ppm)   72.8%(26.2%,1.7%)   68.8%(25.1%,1.8%) -5.7%
实施例5 3.1 (2R,4R)   BHT 25mg(50ppm)   67.4%(19.4%,0.9%)   76.6%(21.3%,1.0%) 12.0%
实施例6 3.1 (2R,4R)   儿茶素25mg(50ppm)   74.9%(21.2%,0.5%)   77.3%(21.6%,1.0%) 3.1%
实施例7 3.1 (2S,4S)   抗坏血酸25mg(50ppm)   75.5%(12.2%,0.7%)   73.1%(19.9%,0.9%) -3.3%
实施例8 3.1 (2S,4R)   抗坏血酸25mg(50ppm)   63.3%(13.2%,1.4%)   62.6%(36.3%,1.6%) -1.1%
实施例9 3.1   (2S,4S)(2R,4R)   抗坏血酸25mg(50ppm)   75.3%(13.2%,1.4%)   72.3%(20.9%,0.9%) -4.1%
对照例1 3.1 (2R,4R)   42.4%(12.5%,0.6%)   77.3%(21.6%,0.9%) 45.1%
对照例2 3.1 (2S,4S)   41.0%(12.2%,0.7%)   77.9%(21.1%,1.1%) 47.4%
对照例3 3.1 (2S,4R)   7.9%(5.5%,0.0%)   63.6%(39.5%,1.7%) 87.6%
对照例4 3.1   (2S,4S)(2R,4R)   46.6%(14.1%,0.8%)   80.8%(22.2%,0.1%) 42.3%
对照例5 3.1 (2R,4R) 海藻糖25mg   42.1%(12.3%,0.8%)   77.0%(21.3%,1.0%) 45.3%
  参照例1   3.1   L-Trp   无   94.0%   100.0%   6.0%
                    表4光源D65灯光照度3000lux光照时间165小时
  pH   莫纳甜   添加剂   光照   光屏蔽   光分解率
对照例6 2.8 (2R,4R)   36.8%(13.0%,0.9%)   77.4%(25.5%,13%) 52.5%
对照例7 3.5 (2R,4R)   63.4%(11.5%,0.5%)   87.6%(14.7%,0.5%) 27.6%
对照例8 4.0 (2R,4R)   79.8%(6.5%,0.0%)   94.8%(7.1%,0.0%) 15.9%
对照例9 4.5 (2R,4R)   89.8%(2.6%,0.0%)   100.0%(2.7%,0.0%) 10.2%
  对照例10 5.5 (2R,4R)   96.9%(0.0%,0.0%)   101.8%(0.0%,0.0%) 4.8%
对照例11 6.5 (2R,4R)   97.3%(0.0%,0.0%)   101.7%(0.0%,0.0%) 4.3%
                    表5光源具有紫外吸收薄膜的荧光灯73小时
  pH   莫纳甜   添加剂   光照   光屏蔽   光分解率
实施例10 3.1 (2R,4R)   抗坏血酸25mg(50ppm) 76.7%(21.1%,0.6%) 74.2%(20.0%,0.5%) -3.4%
实施例11 3.1 (2R,4R)   K2SO325mg(50ppm) 74.4%(20.0%,0.5%) 76.0%(20.0%,0.5%) 2.1%
实施例12 3.1 (2R,4R) none   75.2%(20.9%,1.4%)   76.8%(20.9%,0.5%) 2.1%
                              表6光源太阳光14小时
  pH   莫纳甜   添加剂   光照   光屏蔽   光分解率
实施例13 3.1 (2R,4R)   抗坏血酸25mg(50ppm) 77.3%(22.2%,0.6%) 74.2%(20.1%,0.5%) -4.2%
对照例12 3.1 (2R,4R)   K2SO325mg(50ppm)   2.2%(0.7%,0.0%)   76.0%(20.0%,0.5%) 97.2%
对照例13 3.1 (2R,4R)   41.9%(13.3%,0.9%)   76.8%(20.9%,0.5%) 45.4%
                              表7光源近紫外光的灯73小时
  pH   莫纳甜   添加剂   光照   光屏蔽   光分解率
实施例14 3.1 (2R,4R)   抗坏血酸25mg(50ppm) 76.2%(21.0%,0.6%) 74.2%(20.1%,0.5%) -2.7%
对照例14 3.1 (2R,4R)   K2SO325mg(50ppm)   3.9%(0.8%,0.0%)   76.0%(20.0%,0.5%) 94.8%
对照例15 3.1 (2R,4R)   16.3%(6.3%,1.4%)   76.8%(20.9%,0.5%) 78.8%
               表8光源D65灯光照度3000lux光照时间165小时
  光分解率
pH   Trp(50ppm)   莫纳甜(50ppm) 莫纳甜(50ppm)+抗坏血酸(50ppm)
  2.8   7.3%   52.5%   未测定
  3.1   6.0%   45.1%   -2%
  3.5   6.2%   27.6%   未测定
  4   5.5%   15.9%   未测定
  4.5   5.4%   10.2%   -1%
  5.5   12.5%   4.8%   未测定
  6.5   55.1%   4.3%   0%
本申请基于2004年10月15日在日本提交的专利申请No.2004-302120,其内容合并在此作为参考。

Claims (21)

1.一种包含莫纳甜或其盐、和自由基净化剂的甜味剂组合物。
2-如权利要求1所述的组合物,其特征在于,所述自由基净化剂选自由抗坏血酸、维生素C、抗坏血酸酯、异抗坏血酸、异抗坏血酸盐、异抗坏血酸酯、尿酸、胆红素、白蛋白、维生素A、维生素E、泛醌醇、类胡萝卜素、组氨酸、色氨酸、2,6-二叔丁基-4-甲酚、2-叔丁基-4-羟基苯甲醚、3-叔丁基-4-羟基苯甲醚、培酸丙酯和儿茶素构成的组中的至少一种。
3.如权利要求1所述的组合物,其特征在于,所述自由基净化剂选自由抗坏血酸、维生素C、抗坏血酸酯、异抗坏血酸、异抗坏血酸盐和异抗坏血酸酯构成的组中的至少一种。
4.如权利要求1所述的组合物,其特征在于,所述自由基净化剂是抗坏血酸。
5.如权利要求1所述的组合物,其特征在于,所述组合物是pH值不低于2且低于7的液相组合物。
6.如权利要求1所述的组合物,其特征在于,以100质量份的所述莫纳甜或其盐为基准,所述自由基净化剂的含量是1-10000质量份。
7.一种含有如权利要求1所述的组合物的饮料、食品、口腔组合物或药品。
8.一种含有如权利要求1所述的组合物的饮料。
9.一种用于莫纳甜或其盐的保存稳定剂,其含有自由基净化剂。
10.一种莫纳甜或其盐的保存方法,包括在有自由基净化剂存在下对所述莫纳甜或其盐进行保存。
11.一种含有莫纳甜或其盐的甜味剂组合物、饮料、食品、口腔组合物或药品的保存方法,包括在有自由基净化剂存在下对所述莫纳甜或其盐进行保存。
12.一种含有莫纳甜或其盐的饮料的保存方法,包括在有自由基净化剂存在下对所述莫纳甜或其盐进行保存。
13.一种莫纳甜或其盐的保存方法,包括使所述莫纳甜或其盐处于不暴露在紫外光的条件下。
14.一种含有莫纳甜或其盐的甜味剂组合物、饮料、食品、口腔组合物或药品的保存方法,包括使所述莫纳甜或其盐处于不暴露在紫外光的条件下。
15.一种含有莫纳甜或其盐的饮料的保存方法,其包括使所述莫纳甜或所述其盐处于不暴露在紫外光的条件下。
16.一种如权利要求13所述的保存方法,包括在有自由基净化剂存在下进行保存。
17.一种莫纳甜或其盐,其被封装入屏蔽紫外光的容器中。
18.一种含有莫纳甜或其盐的甜味剂组合物、饮料、食品、口腔组合物或药品,其被封装入屏蔽紫外光的容器中。
19.一种含有莫纳甜或其盐的饮料,其被封装入屏蔽紫外光的容器中。
20.一种含有莫纳甜或其盐、和自由基净化剂的甜味剂组合物、饮料、食品、口腔组合物或药品,其被封装入屏蔽紫外光的容器中。
21.一种含有所述莫纳甜或其盐、和自由基净化剂的饮料,其被封装入屏蔽紫外光的容器中。
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