天然色素超临界CO2萃取技术研究进展

本文介绍了超临界萃取技术在食用天然色素研发中的应用现状,对近十年来超临界CO2萃取天然色素的研究报告做了统计,重点介绍了辣椒红素、胡萝卜素、番茄红素、玉米黄色素等超临界CO2萃取技术的研究进展.     

超临界CO2技术应用于天然色素萃取的研究进展

综述了超临界流体技术在天然色素萃取中的应用现状,对超临界CO2萃取不同种类色素的可行性、萃取理论和研究成果等方面进行了总结。探讨了超临界CO2在天然色素萃取方面存在的不足和需要解决的问题。     

超临界CO2萃取天然产物的应用现状

超临界CO2萃取具备高效、节能、清洁、操作条件温和等优点,受到越来越多的关注,正逐渐成为取代传统溶剂法提取活性物质的绿色工艺之一。为了进一步了解超临界CO2萃取技术的应用现状,该文介绍了超临界流体萃取（SFE）技术的原理,依据提取天然产物的类型综述了该技术在植物精油、天然色素、生物碱提取中的应用,与传统溶剂方法相比所具有的优势,并展望了其工业化应用前景,为超临界CO2萃取技术在天然产物中的应用提供参考和借鉴。     

超临界二氧化碳流体萃取

文章综述了超临界二氧化碳流体萃取技术的特点,并从饮品和酒类、油脂、多不饱和脂肪酸、天然色素和天然香料五个方面对其应用进行了介绍。同时对超临界CO2流体萃取技术前景进行了展望。     

超临界CO2萃取天然植物香料研究进展

超临界CO2萃取技术在天然香料领域的应用越来越广泛。本文按香料植物器官分类,对超临界CO2萃取技术在天然植物香料提取方面的最新应用研究进行了总结,同时对超临界CO2萃取的技术特点和工业化前景进行了分析和展望。     

辣椒红素提取方法的比较

文章通过比较溶剂法及超临界CO2萃取法提取辣椒红素的工艺,确定出辣椒红素提取率高、色价高的工艺条件.实验表明:最佳提取工艺条件为:超临界CO2萃取法,萃取时间2 h、萃取温度50℃、萃取压力22 MPa、分离温度50℃,辣椒红色素提取率为5.19%.     

天然色素的超临界流体萃取研究

本文重点综述了超临界流体技术在萃取天然色素中的应用成果,首次以天然色素的分类作为切入点,采研究超临界二氧化碳萃取不同种类色素的可行性,就其萃取理论和研究成果等方面进行了总结.最后探讨了超临界C02在萃取天然色素方面存在的不足之处和尚需解决的问题.     

超临界萃取技术在粮油工业中的应用

本文主要介绍了超临界萃取技术在粮油工业中的应用情况,包括超临界萃取技术在油脂提取、磷脂的分离、不饱和脂肪酸分离、油脂精炼、天然色素提取、天然抗氧化剂提取、甾醇提取等中的应用。     

不同萃取条件对麦胚中天然维生素E的SFE-CO_2提取的影响

研究以小麦胚芽为试验材料 ,利用超临界流体萃取技术从麦胚中提取了天然维生素E。结果表明 :麦胚中天然维生素E的超临界CO2 适宜萃取条件为萃取压力 2 8～ 35MPa、萃取温度 40～ 45℃、CO2 流量 2mL/min、萃取时间 90min。     

红曲米中红曲色素CO2超临界萃取研究

本文介绍了用超临界CO2萃取红曲米中红曲色素的新方法，并初步考察了压力、温度、CO2流量以及原料颗粒直径对萃取效果的影响。     

Natural colorants: Pigment stability and extraction yield enhancement via utilization of appropriate pretreatment and extraction methods

Natural colorants from plant-based materials have gained increasing popularity due to health consciousness of consumers. Among the many steps involved in the production of natural colorants, pigment extraction is one of the most important. Soxhlet extraction, maceration, and hydrodistillation are conventional methods that have been widely used in industry and laboratory for such a purpose. Recently, various non-conventional methods, such as supercritical fluid extraction, pressurized liquid extraction, microwave-assisted extraction, ultrasound-assisted extraction, pulsed-electric field extraction, and enzyme-assisted extraction have emerged as alternatives to conventional methods due to the advantages of the former in terms of smaller solvent consumption, shorter extraction time, and more environment-friendliness. Prior to the extraction step, pretreatment of plant materials to enhance the stability of natural pigments is another important step that must be carefully taken care of. In this paper, a comprehensive review of appropriate pretreatment and extraction methods for chlorophylls, carotenoids, betalains, and anthocyanins, which are major classes of plant pigments, is provided by using pigment stability and extraction yield as assessment criteria.     

牡丹花中色素的提取及性能研究进展

综述了牡丹花色素的提取工艺及纯化方法,包括溶剂萃取法、超临界流体萃取法、酶提取法、超声波辅助萃取法和微波辅助萃取法;纯化方法主要采用柱层析法、膜分离法、高速逆流色谱法和重结晶法。牡丹花色素属于类黄酮化合物,主要有花色苷、黄酮和黄酮醇的苷类。然后对牡丹花色素光谱特性、溶解性、耐光性、耐氧化性、耐还原性及pH和金属离子对色素显色特性等理化性质进行阐述。最后提出牡丹花色素研究中存在的问题及发展方向。     

天然食用色素制备技术简介

阐述了天然食用色素的制备方法,包括溶剂提取法、冻结融解法、超临界流体提取法、大网络树脂吸附法、微波提取法、酶法提取、超声波提取法等。     

板栗壳棕色素的提取、纯化及应用研究进展

板栗壳作为食品加工废弃物,来源丰富,成本低廉,可用于提取板栗壳棕色素。板栗壳棕色素是一种性质稳定且具有一定保健功能的天然色素,近年来得到了广泛的研究和应用。本文综述了板栗壳棕色素的提取方法,包括溶剂浸提法、超声波提取法、微波提取法、超临界流体萃取法、酶法提取法等,以及板栗壳棕色素在食品、纺织品中的应用,讨论了目前存在的问题,并展望了板栗色素的应用前景。     

Functional food oil coloured by pigments extracted from microalgae with supercritical CO2

A functional food oil, rich in fatty acids and antioxidants, coloured with pigments (carotenoids) extracted with supercritical CO₂ from the microalga Chlorella vulgaris, was produced, having in view its use in food industry (namely for derived seafood). The supercritical fluid extraction (SFE) was carried out in order to study the effect of several modifiers (oil mixed with the microalga and ethanol with the supercritical CO₂), the degree of crushing of the microalga and the supercritical fluid flow rate, at a pressure of 300 bar and temperature of 40 °C. Moreover, the microalga pigments were also extracted with acetone and with vegetable oil at room and high temperature. The recovery of carotenoids was 100% with oil at room temperature for 17 h, 70% with oil at 100 °C for 30 min, 69% with supercritical CO₂ at 40 °C and 300 bar. In SFE the degree of crushing strongly influenced the extraction recovery and higher pigment recoveries were obtained with well crushed biomass.     

J. Cosmet. Sci., 59, 431–440 (September/October 2008)Red pigment from Lithospermum erythrorhizon by supercritical CO2 extraction

In this study, a stable red pigment was prepared from Lithospermum erythrorhizon via supercritical carbon dioxide extraction. The optimal extraction conditions were 400 bar and 60°C. The patch tests indicated that up to 10% of the red pigment was acceptable from a skin irritation standpoint. According to the results of the CIE LAB chromaticity test, the color difference was acceptable when compared to commercial synthetic red pigments. The light-illuminated color stability test indicated that the pigment was more stable than the red pigment extracted with ethanol. The higher stability was also demonstrated in the DPPH anti-oxidant activity test. The supercritical red pigment harbored elevated amounts of shikonin and derivatives, and appears to be usable as a stable red pigment for cosmetic color products.     

Fractional Extraction of Paprika using Supercritical Carbon Dioxide and On-line Determination of Carotenoids

ABSTRACT: Fractionation of pigments occurs over time during supercritical extraction of oil from natural matrices containing carotenoids. Paprika powder and paprika oleoresin were extracted using CO₂ at temperatures of up to 80°C and pressures up to 50 MPa. The pigment concentration in the supercritical phase was monitored with an on-line near infrared visible (NIR-VIS) detector. Concentrations of 90 to 200 g/kg total carotenoids were achieved in oleoresin extracted from starting material containing only 1.2 g/kg total carotenoids. The ratio of ß-carotene + free xanthophylls to total carotenoids in the recovered oleoresin diminished from nearly 50% (w/w) at the beginning down to 10% at the end of the extraction. Increased pressure improved kinetics of carotenoid extraction.