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萝卜樱叶绿素铜钠的制备和性质研究 总被引:4,自引:0,他引:4
由胡萝卜樱叶提取叶绿素并经皂化、铜代及成盐反应制备叶绿素铜钠.用正交法考察了铜代反应的温度、时间、皂化液与硫酸铜溶液的体积比三因素对叶绿素铜钠制备的影响,并对叶绿素铜钠的溶解性、光稳定性、热稳定性、耐氧化性、耐还原性、耐酸碱性以及一些食品添加剂对该色素吸光度的影响等理化性质进行研究.结果表明,铜代反应最佳工艺条件为:反应温度为60℃,反应时间为2小时,皂化液与20%硫酸铜溶液的体积比为6:1,且叶绿素铜钠耐热、耐氧化还原性较好,但是耐光性较差. 相似文献
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本文选用3种叶绿素-胡萝卜素软膏用原料,采用液-液萃取方法,从有机相分离出针叶维生素原浓缩物产品;利用硫酸铜螯合的方法,从水相制取我地叶叶绿素铜钠产品。研究表明,采用同一工艺操作,不同品种的叶录素-胡萝卜素软膏原料制得的针叶维生素原浓缩物和针叶叶绿素铜钠产品,对产品得率影响不明显,但对产品质量影响很大。 相似文献
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以龙柏叶为原料 ,经过一系列物理、化学过程 ,制得天然含铜绿色素———叶绿素铜钠 ,并对叶绿素铜钠的稳定性进行了检测 ,从而得出 ,只有 pH值的影响较为显著 ,使叶绿素铜钠保存率有较大的改变。其它因素影响均不大 相似文献
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Commercial K chlorophyllin from three different manufacturers was studied by IR spectroscopy. All samples contained some keto form of chlorophyllin. Chemical analysis showed that they also contain impurities of carboxylic acid salt. The hydration and coordination of the keto and the carboxyl groups was investigated by comparing the spectra obtained in disks of different alkali-halides. The spectra of the insoluble chlorophyllin salts of Mg, Al, Co and Cu were also studied. 相似文献
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以蚕沙为原料,采用直接皂化法制备叶绿素铜钠盐。结果表明,最优工艺参数为:10 g干蚕沙粉在pH≈12的体系中,80℃下超声120 min;再于pH 2~3的体系中,65℃下酸化30 min,加入6 mL 10%CuSO4溶液,置铜时间90 min,最后用10%NaOH-CH3CH2OH调节溶液使叶绿素铜酸成盐析出,叶绿素铜钠盐的得率大于传统制备法,而且少一道工序,降低了成本。 相似文献
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以蚕沙为原料,利用溶剂从中提取得到叶绿素,经过皂化、酸化、锰代及成盐等过程,制备得到叶绿素锰钠盐,并对其稳定性进行初步研究。结果发现,叶绿素锰钠盐易溶于水,在温度低于80℃,pH为8.0~10.0范围具有较好的稳定性。 相似文献
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以薄荷叶为原料,通过浸提得到叶绿索。经皂化、酸化、锌代等过程,制得叶绿素锌钠盐。结果表明,该产品水溶性好,耐热性、耐氧化还原性较好,但在光照条件下,稳定性差。几种常见的食品添加剂及金属离子对叶绿素锌钠盐的影响小,但Cu^2+、Fe^3+对叶绿索锌钠盐的稳定性有较大的影响。 相似文献
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Increase in mass transport resistance is one of the major difficulties in immobilization by the use of gels. Functional gels can change their volume and inner structure depending on ambient conditions as stimuli and may reduce the difficulty as a novel immobilization matrix. The response of poly N‐isopropylacrylamide‐co‐chlorophyllin (NIPAAm‐Ch) gel to temperature changes and its performance on nitrification with nitrifiers immobilized by the gel were investigated in a continuous‐flow stirred‐tank reactor (CFSTR) with cyclic temperature changes. The gel with an immobilized nitrifier swelled and shrank alternately with 1.2–1.6‐fold volume change under a cyclic temperature change of 32–36°C with a period of 2 or 4 h in the reactor. Volume changes of the gel brought periodic changes of its structure that accelerated dissolved oxygen transfer and concentrated ammonium into, and as a result, promoted nitrification compared with that at constant temperature. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 681–686, 2007 相似文献