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从楮树果中提取一种天然橙红色素,研究了常用食品添加剂和常见的几种金属离子对楮果中天然色素稳定性的影响,并对其耐酸碱性,耐氧化性,耐还原性以及耐热耐光性进行了探讨。 相似文献
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研究了常用的几种食品添加剂对隐黄素稳定性的影响,探讨了隐黄素的耐热性、耐光性和耐氧化性、耐还原性。结果表明,隐黄素具有较强的耐氧化性和耐还原性,可与各种常见的食品添加剂共同使用,但其耐热、耐光性较差。 相似文献
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从短梗霉中提取黑色素,并对黑色素的酸碱、热、光、耐氧化还原性以及常用食品添加剂对色素稳定性的影响进行了探讨。结果表明:黑色素的最大吸收峰为225nm;碱性条件下呈黑褐色,酸性下呈棕红或棕黄色;除还原剂以外,热、光、氧化剂及常用食品添加剂对其无影响,说明该色素稳定性良好,作为天然色素具有广阔的开发应用前景。 相似文献
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桅子黄色素的提取工艺及稳定性的研究 总被引:7,自引:0,他引:7
以栀子为原料,用蒸馏水浸泡提取天然桔黄色素,研究了食品中常用的几种添加剂对栀子黄色素稳定性的研究,并对色素的耐氧性、耐光性、耐酸性等性质进行了研究。 相似文献
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叶绿素铬钠盐的制备及理化性质 总被引:2,自引:0,他引:2
由菠菜叶提取叶绿素并经皂化、酸化、铬代及成盐反应制备叶绿素铬钠,测定了它的紫外可见光谱,并与叶绿素铜(II)钠盐的紫外可见光谱进行比较,同时测定了叶绿素铬钠盐理化性质。实验结果表明:叶绿素铬钠盐在360.8、401.6、655.1nm处有特征吸收峰,紫外可见光谱与叶绿素锰(III)叶绿素镧(III)相似,证明铬离子已经配位到叶绿素卟啉环上,形成了叶绿素铬钠盐。叶绿素铬钠盐能溶于水,在中性溶液中稳定,有一定的抗氧化还原性,热稳定性好,光稳定性较差。其中食盐这种食品添加剂对叶绿素铬钠盐的稳定性影响不大。 相似文献
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López-Carballo G Hernández-Muñoz P Gavara R Ocio MJ 《International journal of food microbiology》2008,126(1-2):65-70
The aim of this work was to develop antimicrobial photosensitizer-containing edible films and coatings based on gelatin as the polymer matrix, incorporating sodium magnesium chlorophyllin (E-140) and sodium copper chlorophyllin (E-141). Chlorophyllins were incorporated into the gelatin film-forming solution and the inhibiting effect of the cast films was tested against Staphylococcus aureus and Listeria monocytogenes. The results demonstrated that water soluble sodium magnesium chlorophyllin and water soluble sodium copper chlorophyllin reduced the growth of S. aureus and L. monocytogenes by 5 log and 4 log respectively. Subsequently, the activity of self-standing films and coatings containing E-140 was assessed on cooked frankfurters inoculated with S. aureus and L. monocytogenes. These tests showed that it was possible to reduce microorganism growth in cooked frankfurters inoculated with S. aureus and L. monocytogenes by covering them with sodium magnesium chlorophyllin-gelatin films and coatings. 相似文献
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超声法提取松针叶绿素及稳定性研究 总被引:2,自引:0,他引:2
以白皮松为原料,使用乙醇作提取剂,采用超声法对松针叶绿素的提取方法进行了研究.通过单因素实验和正交试验分别考察了提取时间、乙醇浓度、体积料液比、溶液温度对提取率的影响.得到超声法最佳提取条件为无水乙醇作提取剂,体积料液比1∶4,溶液温度40℃,超声时间15min.在此条件下的提取率为94.4%.叶绿素铜钠盐的制备:以松针为原料,将含Mg离子的叶绿素通过置换反应制得水溶性的叶绿素铜钠盐,再用乙醇浸提,然后用石油醚分离出脂溶性成份,最后制得叶绿素铜钠盐.结果表明,叶绿素铜钠盐在常温下可以存放30d,叶绿素的稳定性大为提高. 相似文献
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《Innovative Food Science and Emerging Technologies》2007,8(3):419-425
Five commercial samples of sodium copper chlorophyllin, a green food colorant, were analysed by high-performance liquid chromatography (HPLC) using diode-array detection (DAD) and mass spectrometry (MS). Some of the constituents were identified using authentic standards, whereas others were identified tentatively based on their absorption spectra and mass data. The composition of three of the samples was very similar, whereas the other two were quite different. In the three former samples, the three largest peaks could be assigned to Cu chlorin e6, Cu chlorin p6, and Cu isochlorin e4. In one of the two other samples, these three compounds were also among the largest peaks, whereas Cu chlorin e6 was a small peak in the last sample and Cu chlorin p6 was absent altogether. Porphyrins were also present in the samples, while except in one of the samples chlorins derived from chlorophyll b were largely absent.Industrial relevanceSodium copper chlorophyllin is a green food colorant made from chlorophyll. Sodium copper chlorophyllin is made by saponifying chlorophyll and coppering the resulting product. This processing leads to a complex mixture of compounds. An analytical method was developed that can be used to identify many of these compounds and show the extent of coppering and degradation of sodium copper chlorophyllin, which may be used industrially to optimize the production of sodium copper chlorophyllin. 相似文献
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常用食用防腐剂对食用天然色素影响的研究 总被引:5,自引:0,他引:5
以 2种常用食品防腐剂———苯甲酸钠、山梨酸钾对 6种食用天然色素的影响 ,通过可见光谱、紫外光谱的分析研究看出 ,6种食用天然色素受防腐剂影响较大的为葡萄皮红色素和姜黄色素 ;有一定影响的为叶绿素铜钠盐和辣椒红色素 ;基本没有影响的为栀子黄色素和高粱红色素。此结果为食用天然色素的应用推广提供了科学的依据和参考 相似文献
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厚朴是中国的传统中药原材料,广泛用作食品包装材料。本实验以20%食盐腌制的厚朴叶为原料,对乙醇脱色和叶绿素铜钠盐复染的最佳工艺进行了研究。以脱色残液中的叶绿素含量为指标,通过单因素实验和正交实验得到最佳脱色工艺为:乙醇浓度80%、料液比1:50 g/mL、脱色温度70 ℃、脱色时间3 h,此时厚朴叶转变为茶花色。以叶绿素铜钠盐的上染率为指标,通过单因素实验和正交实验得到最佳染色工艺为:叶绿素铜钠盐浓度4 g/L、料液比1:5 g/mL、染色温度95 ℃、染色时间40 min,成功地将厚朴叶复染呈亮绿色。该工艺可应用于厚朴叶工业化生产。 相似文献