红龙果红色素的稳定性

红龙果HylocereusCostaricensis(Weber)Britt.是仙人掌科三角属植物,又称青龙果、芝麻果等,原产于墨西哥。是近年由国外引进的一种新品食用水果,它所含丰富的红色色素H可作为食用色素[1,2]。在对其提取工艺条件及色素的溶解性、光谱特性和溶液pH值、温度、光等对H稳定性的影响进行考察[3]的基础上,本文主要探讨食品添加剂、氧化剂以及常见的金属离子对色素稳定性的影响,为开发利用这一资源提供理论依据和实验经验。1　实验部分红龙果产于广西南宁市郊。所用试剂均为国产分析纯。将红龙果切碎,用70%的乙醇水溶液室温下浸提5h,抽滤,滤…     

红龙果食用红色素的提取及理化性质分析（I）

从红龙果中提取了食用红色素H和副产物，研究了该食用红色素的理化性质，包括红色素的溶解性和可见吸收光谱特征，溶液pH值、加热、光等对色素稳定性的影响；还进行了色素和副产物的IR分析，红龙果挥发油成分的GC-MS分析；研究表明该色素为水溶性色素，其吸收光谱因pH而异，在pH=4-7、低温、避光条件下稳定性好；副产物为肌醇。     

微波场协同提取红龙果食用红色素的研究

研究了应用微波从红龙果（Hylocereus Costaricensis or Weber Britt）中提取食用红色素的新工艺，并确定了最佳工艺条件：提取剂为50％的乙醇溶液，原料用量（g）与提取剂用量（mL）比为1：90。微波功率为700W，提取时间为20s，提取次数为4次。最佳工艺条件下的色素提取率为98．94％，产品pH值为6。与溶剂浸提法相比，微波法提取红龙果食用红色素的每次提取时间由2h减少到20s，提取率从90．96％增加到98．94％。     

红龙果食用红色素的提取及理化性质分析(Ⅰ)

从红龙果中提取了食用红色素H和副产物,研究了该食用红色素的理化性质,包括红色素的溶解性和可见吸收光谱特征,溶液pH值、加热、光等对色素稳定性的影响;还进行了色素和副产物的IR分析,红龙果挥发油成分的GC-MS分析;研究表明该色素为水溶性色素,其吸收光谱因pH而异,在pH=4～7、低温、避光条件下稳定性好;副产物为肌醇.     

天然红色素的提取研究进展

作为天然色素中的一大类,天然红色素在人们的日常生活中日益发挥着重要的作用。国内对天然红色素的提取研究起步较晚,但发展迅速。文章重点介绍了辣椒红色素、番茄红素、桑椹红色素等几种重要天然红色素的性质和提取方法,并比较了有机溶剂法、超临界CO2流体萃取法等提取方法的特点,同时对其效果和应用作了相应的展望。     

食用色素的性质及其应用

本文主要概述了我国食用色素的现状,以及食用天然色素的分类,着重叙述了我国已经工业化生产的19种食用天然色素的结构、性质及其适用范围。     

内蒙古地区天然植物沙棘果中黄色素的提取工艺及性质研究

以内蒙古地区沙棘果实为原料，研究了提取黄色素的工艺条件，同时对该色素的性质进行了初步探讨。结果表明，以95％的乙醇溶液作浸提剂，提取的黄色素浓度最高，工艺流程简单易行，且无毒，无污染。对提取的黄色素进行的性质试验表明，沙棘黄色素对光、热具有较好的稳定性，适用于酸性或弱碱性的食品中，葡萄糖、氧化剂(H2O2)、还原剂(Na2SO3)等食品添加剂均无明显影响以上结果为这种优良天然色素的开发与应用提供了参考。     

月季花红色素的提取及稳定性的研究

一．引言月季，别名月月红，月季花（ＲｏＳａＣｈｉｎｅｎｓｉｓＪａｃｑ），属蔷薇科，蔷薇属，从每年的３月到１０月蓓蕾续放，开花不绝，现广泛栽培，主要分布于河北、陕西、山西等地。月季花主要成分为萜醇类化合物［１］，花、根及叶均可入药，内服可治妇女病，外用...     

柿子蒂中红色素的提取及稳定性研究

柿子在我国北方的陕西、山西、河南、河北等省资源十分丰富,我们在对柿子深加工的同时又从副产物柿子蒂中提取出了食用红色素.     

微波场协同提取金银花黄色素的研究

研究了应用微波技术从金银花(Lonicera japonicaThunb)中提取黄色素的新工艺,并确定了最佳工艺条件:提取剂为无水乙醇,原料用量(g)与提取剂用量(mL)比为1∶60,提取时间为50 s,微波功率为560 W,提取次数为3次。最佳工艺条件下的色素提取率为83.40%,产品pH值为6。与溶剂浸提法相比,微波法提取金银花黄色素的每次提取时间由1 h减少到50 s,提取率从52.21%增加到83.40%,效果明显优于常规的溶剂浸提法。     

紫荆花红色素的提取及其稳定性研究

报道了从苏木科植物紫荆（CersischinensisBunge）的花中提取天然红色素的方法。对提取条件进行了优化实验，并在不同条件下考察了紫荆花红色素的稳定性。     

七星剑花、肇芡的微量元素研究

七星剑花和肇芡是广东肇庆产的著名地道中药，本文首次报道两者的金属微量元素的测定方法及测定结果。并发现七星剑花钙的含量比其他微量元素高3个数量级，提示其水煮液及作为汤料有高级天然补钙剂的作用。     

高效液相色谱全轮廓指纹图谱结合化学计量学区分不同地区的紫苏叶

利用高效液相色谱全轮廓指纹图谱结合化学计量学方法对不同栽培地区的紫苏叶样品(共84个)进行区分。全轮廓色谱数据经自适应迭代加权最小二乘法(airPLS)和相关优化翘曲法(COW)校正后,基线和保留时间漂移现象均得到明显改善。经预处理后的色谱数据采用主成分分析(PCA)进行解析,结果表明不同来源的样品能按其特性各自聚为一类;而分段间隔压缩变量后的色谱数据经主成分分析处理可得到与全轮廓色谱数据为输入变量时相一致的结果。此外,偏最小二乘判别分析(PLS-DA)对于紫苏叶样品分类的识别能力和预报能力分别为92.8%和89.6%。     

微波场协同提取野菊花黄色素的研究

研究了微波提取野菊花 (Chrysanthemumindicum)黄色素的新工艺并确定了最佳工艺条件 :原料为 2 0 0 0 0g野菊干花 ,提取剂为无水乙醇 ,提取剂比例为 1 /70 ,微波功率为 80 0W ,提取时间为 45 0s,提取次数为 3次 ,最佳工艺条件下色素的提取率为 91 1 % ,产率为 1 4 6% ,色价E ( 1 % ,3 2 1nm)为 42 2 ,产品pH值为 6 5。与溶剂浸提法相比 ,微波提取野菊花黄色素的每次提取时间由 1 2h减小为 45 0s,提取率从 88 6%增加到 91 1 %。     

Nutritional Analysis of Red-Purple and White-Fleshed Pitaya (Hylocereus) Species

Pitaya is one of the most preferred and produced tropical fruit species recently introduced to the Mediterrranean region in Turkey. Due to its nutritional fruits with high economic value, the popularity of pitaya increases steadily in Turkey as an alternative crop. No detailed nutritional analysis has been undertaken in Turkey so far on fruits of the pitaya species. In this study, we determined and compared some nutritional parameters in fruit flesh of two pitaya (dragon fruit) species (Hylocereus polyrhizus: Siyam and Hylocereus undatus: Vietnam Jaina) grown in the Adana province located in the eastern Mediterranean region in Turkey. The individual sugars, antioxidant activity, total phenolic content, phenolic compounds and volatiles were determined for the first time in Turkey on two pitaya species. The results showed that total phenol content and antioxidant capacity are notably higher in red-fleshed fruits than white-fleshed ones and the predominant phenolic compound in fruits of both species was quercetin. The total sugar content and most of the phenolic compounds in fruits of two pitaya species were similar. A total of 51 volatile compounds were detected by using two Solid Phase Micro Extraction (SPME) fibers, coupled with Gas Chromatography Mass Spectrometry (GC-MS) techniques, and more volatile compounds were presented in the white-fleshed species. Total phenolic content (TPC) of the red-fleshed and white-fleshed pitaya species were 16.66 and 17.11 mg GAE/100 g FW (fresh weight). This study provides a first look at the biochemical comparison of red-fleshed and white-fleshed pitaya species introduced and cultivated in Turkey. The results also showed, for the first time, the biochemical content and the potential health benefit of Hylocereus grown in different agroecological conditions, providing important information for pitaya researchers and application perspective.     

Comparative Analysis of Polycyclic Aromatic Hydrocarbons and Halogenated Polycyclic Aromatic Hydrocarbons in Different Parts of Perilla frutescens (L.) Britt.

Perilla frutescens (L.) Britt., a medicinal herb and edible plant, is very popular among East Asian countries. The perilla leaves, stems and seeds can be used as traditional medicines and foods. Polycyclic aromatic hydrocarbons (PAHs) and halogenated PAHs (HPAHs) are organic pollutants that are widely present in the environment, such as in water, air and soil, and are harmful to humans. In this study, the contents of 16 PAHs and 4 HPAHs in perilla leaves, stems and seeds were determined by gas chromatography tandem mass spectrometry (GC-MS). A total of 12 PAHs were detected in all samples, and no HPAHs were detected. The total contents of PAHs in perilla leaves, stems and seeds varied from 41.93 to 415.60 ng/g, 7.02 to 51.52 ng/g and 15.24 to 180.00 ng/g, respectively. The statistical analyses showed that there were significant differences in the distribution of PAHs in perilla leaves, stems and seeds. On the basis of the toxic equivalent quantity (TEQ) and incremental lifetime cancer risk (ILCR) model, the cancer risks of the intake of perilla leaves, stems and seeds were assessed to be from 3.30 × 10⁻⁸ to 2.11 × 10⁻⁵, 5.52 × 10⁻⁹ to 5.50 × 10⁻⁸ and 1.20 × 10⁻⁸ to 1.41 × 10⁻⁷, respectively. These were lower than 10⁻⁴ (the priority risk level of the EPA) and suggested that there may be almost no cancer risk from the intake of these traditional Chinese medicines (TCMs).     

柴达木唐古特白刺色素中矿物质元素分析

对唐古特白刺色素的矿物质元素进行了分析。结果表明,在色素中Na、K、Ca含量高,这与白刺生长在盐碱地有关;Fe、Zn、Cu、Mn、Se等必需微量元素含量丰富;有害元素含量低。为唐古特白刺色素在食品和饮料中的应用提供了基础数据。