凝胶渗透-高效液相色谱法测定棕榈油中的对位红和苏丹色素

采用凝胶渗透色谱(GPC)分离棕榈油中的对位红和苏丹色素,浓缩后用纯乙腈淋洗的高效液相色谱双波长检测法测定其中各待测组分的含量.测定结果表明最低检测限:对位红、苏丹Ⅰ、Ⅱ、Ⅲ、Ⅳ分别为0.03、0.06、0.10、0.08、0.10 mg/kg;相对标准偏差为2.15%～5.23%,平均回收率为83%～95%.操作方法简便,结果准确可靠.     

基质固相分散术-UPLC 法检测禽蛋中对位红和苏丹红

建立禽蛋中对位红和苏丹红Ⅰ～Ⅳ号5 种色素的液相色谱检测方法。采用基质固相分散术,以氧化铝作基质分散基体,混合均匀的样品用正己烷- 丙酮(99.5:0.5,V/V)直接洗脱,吹干后定容测定,外标法定量。5 种色素的平均回收率为63.8%～96.2%,平均变异系数为0.52%～10.07%,检测限为0.01～0.02mg/kg。在检测的100个样品中,1 例检出苏丹红Ⅳ号。     

苏丹红Ⅰ免疫亲和柱的研制与鉴定

以羧基化的琼脂糖凝胶4FF为载体,采用碳化二亚胺法偶联抗苏丹红Ⅰ(SudanⅠ)单克隆抗体,制备苏丹红Ⅰ免疫亲和柱(IAC)。将SudanⅠ样品过免疫亲和柱,乙腈洗脱后以高效液相色谱法(HPLC)检测,紫外检测波长为478nm,流动相为0.1%甲酸水溶液-乙腈-0.1%甲酸乙腈溶液-丙酮(体积比为21.25:3.75:60:15)。抗SudanⅠ单克隆抗体免疫亲和柱以0.3g带羧基的琼脂糖凝胶4FF与1mg SudanⅠ单抗偶联,柱容量为1.6μg。辣椒粉以0.25～3mg/kg水平添加SudanⅠ标准品,平均回收率为44.52%～77.40%,相对标准偏差为4.6%～8.3%。信噪比(RSN)为3:1时的最低检测限为15ng/mL。本实验成功制备出苏丹红免疫亲和柱。     

凝胶渗透色谱-高效液相色谱法测定糟蛋中4种 苏丹红的残留量

目的建立一种凝胶渗透色谱-高效液相色谱法(gel permeation chromatography-high performance liquid chromatography,GPC-HPLC)同时测定糟蛋中4种苏丹红(苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ)的方法。方法糟蛋样品经环己烷-乙酸乙酯提取,经Bio-Beads S-X3凝胶柱净化;采用Agilent Zorbax SB C_(18)色谱柱对糟蛋中4种苏丹红进行分离,以97%乙腈水溶液为流动相,流速为1.0 m L/min,用配有紫外检测器的液相色谱仪检测,检测波长为478 nm和520 nm。结果 4种苏丹红样品在0.1~25.0 mg/L浓度范围内线性良好(r~20.999),该方法的检测限为6.3~11.9μg/kg,加标回收率为86.0%~101.2%,相对标准偏差(RSD)在1.68%~4.58%之间。结论本方法操作简便、准确可靠,可应用于糟蛋中苏丹红的检测。     

凝胶渗透色谱-气相色谱法测定食品中BHA、BHT

建立了凝胶渗透色谱-气相色谱法测定油炸食品中丁基羟基茴香醚(BHA)和二丁基羟基甲苯(BHT)两种抗氧化剂。采用乙酸乙酯-环己烷(体积比为1∶1)溶液提取样品中BHA和BHT。提取液经凝胶渗透色谱(GPC)净化。采用配有FID检测器的气相色谱进行测定。方法准确度高、稳定性好。加标回收率为85.7%~94.0%。BHA和BHT检出限为0.002 mg/m L。BHA和BHT在5 mg/L~100 mg/L时,线性相关系数在0.999 6以上。     

高效液相色谱法测定浓缩苹果汁中棒曲霉毒素

利用全自动凝胶渗透色谱净化系统净化、在线浓缩样品,采用高效液相色谱分离,紫外检测器检测建立了浓缩苹果汁中棒曲霉毒素的检测方法。样品经乙酸乙酯:环己烷(1:1)提取,凝胶渗透色谱(GPC)净化,在线浓缩并定容,采用C18柱分离,以乙腈:水(体积比为10:90)为流动相,流速1.0ml/min;检测波长276nm。浓度0.01～10.0mg/L时线性关系良好,加标回收率为83%～107%,相对标准偏差为7.8%～11.4%,检出限0.005mg/kg。该方法操作简单、灵敏度高、重复性好。     

食品中苏丹红Ⅰ～Ⅳ及对位红的GC-MS/SIM法研究

目的:建立同时测定食品中苏丹红Ⅰ～Ⅳ及对位红的新方法.方法:采用气相色谱-质谱选择离子检测法,样品处理采用超声波直接提取和过中性氧化铝柱净化的方法,色谱柱为J&W DB-5HT 30.0m×250 μm×0.10μm石英毛细管柱,柱温的调节采用程序升温法.进样方式:脉冲不分流,进样量1μL;EI离子源,选择m/z248、143、115、276、247、105、293、171、352、380、261、225,利用选择离子法,以菲-氘10为内标进行研究.结果:苏丹红Ⅰ～Ⅳ及对住红的线性范围为0.1～4.0mg/L;方法检出限为0.002～0.01μg/g.RSD为3.7%～8.1%,回收率为82.2%～89.3%.结论:本试验结果准确可靠,选择性和重复性好.     

高效萃取体系RP-HPLC测定食品中的对位红和苏丹红

本文研究使用高效萃取体系,建立反相高效液相色谱(RP-HPLC)同时测定食品中对位红、苏丹红Ⅰ～Ⅳ号及苏丹红7B.样品用甲醇-乙腈-丙酮萃取液提取,采用聚硅烷C1s色谱柱(Shiseido C18 150mm×4.6 mm i.d,5μm)分离以水-乙腈为流动相,流速1.0mL/min,等度洗脱;用紫外-可见光二极管阵...     

HPLC法同时检测辣椒制品中8种非食用红色色素

建立了凝胶柱净化-高效液相色谱法同时检测辣椒制品中苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ、对位红、苏丹红G、苏丹红7B和苏丹红B等8种红色色素的方法。样品用正己烷或正己烷/丙酮提取,提取液经BioBeadsS-X3凝胶柱净化。净化后的样品采用ZorbaxSBC18柱分离,以0.1%甲酸水溶液(A)和含0.1%甲酸的甲醇丙酮(9∶1,V/V)溶液(B)为流动相,流速1mL/min,检测波长505nm。上述8种色素组分在其质量浓度为0.16～2.56mg/L时有良好的线性关系,方法的检测限为15～46μg/kg;平均加标回收率为89.9%～118.2%,相对标准偏差为2.3%～4.8%。该方法灵敏可靠,适合于辣椒制品中多种脂溶性红色色素的同时检测。     

凝胶渗透色谱—气相色谱/质谱法测定塑料桶装食用油中四种邻苯二甲酸酯

建立用凝胶渗透色谱净化―气相色谱/质谱分析塑料桶装食用油中四种邻苯二甲酸酯类增塑剂方法。样品用环己烷―乙酸乙酯(体积比为1∶1)稀释,稀释液经Bio–Bead S–X3凝胶柱净化后,采用气相色谱―质谱在选择离子检测(SIM)模式下进行定性定量分析;结果表明,四种增塑剂在0.1 mg/L~5 mg/L范围内线性关系良好;在空白油样中添加四种增塑剂(添加水平为0.5 mg/kg、5 mg/kg、10 mg/kg)混合标准溶液,平均回收率为85.7%~108.2%,相对标准偏差为3.8%~9.2%,检出限为0.1 mg/kg~0.2 mg/kg。     

天然辣椒红色素的研究进展

辣椒红色素是一种优质天然类胡萝卜素,广泛应用于食品、医药、保健品、化妆品及嗜好品工业中。本文综述了辣椒红色素的理化特性,提取、分离纯化、分析测定等方法及应用前景。     

生姜蛋白酶对红葡萄酒的澄清效果

本研究以莱芜黄姜为原料，用超滤法提取并冻干的生姜蛋白酶及生姜汁对红葡萄酒进行澄清试验，结果表明：生姜蛋白酶能明显提高红葡萄酒的澄清度，其最适加量为0．05mg/L，姜汁不宜作为酶源直接用于红葡萄酒澄清中。     

天然萝卜红色素的抗脂质过氧化功能

采用硫氰酸铁(FTC)法测定了萝卜红色素对亚油酸过氧化反应(40℃)的抑制作用;采用气相色谱法测定了其对芥菜籽油过氧化反应中(93℃)氧的吸收的抑制作用.天然萝卜红色素的抗氧化能力与同浓度的BHT相近,0.01%的添加量即可达到93%以上的抑制率.萝卜红色素是一种应用前景广阔的具有抗氧化功能的天然食用色素.     

甜椒红色素的提取及稳定性研究

本文报道了采用甲醇从红甜椒中提取甜椒红色素的工艺，并对PH值、光、热等因素对其稳定性的影响，作了较深的研究。     

Biological Activities of Red Pepper (Capsicum annuum) and Its Pungent Principle Capsaicin: A Review

Capsaicin, the pungent alkaloid of red pepper (Capsicum annuum) has been extensively studied for its biological effects which are of pharmacological relevance. These include: cardio protective influence, antilithogenic effect, antiinflammatory, and analgesia, thermogenic influence, and beneficial effects on gastrointestinal system. Therefore, capsaicinoids may have the potential clinical value for pain relief, cancer prevention and weight loss. It has been shown that capsaicinoids are potential agonists of capsaicin receptor (TRPV1). They could exert the effects not only through the receptor-dependent pathway but also through the receptor-independent one. The involvement of neuropeptide Substance P, serotonin, and somatostatin in the pharmacological actions of capsaicin has been extensively investigated. Topical application of capsaicin is proved to alleviate pain in arthritis, postoperative neuralgia, diabetic neuropathy, psoriasis, etc. Toxicological studies on capsaicin administered by different routes are documented. Capsaicin inhibits acid secretion, stimulates alkali and mucus secretion and particularly gastric mucosal blood flow which helps in prevention and healing of gastric ulcers. Antioxidant and antiinflammatory properties of capsaicin are established in a number of studies. Chemopreventive potential of capsaicin is evidenced in cell line studies. The health beneficial hypocholesterolemic influence of capsaicin besides being cardio protective has other implications, viz., prevention of cholesterol gallstones and protection of the structural integrity of erythrocytes under conditions of hypercholesterolemia. Beneficial influences of capsaicin on gastrointestinal system include digestive stimulant action and modulation of intestinal ultrastructure so as to enhance permeability to micronutrients.     

A Comparative Study of Ascorbic Acid and Capsaicinoid Contents in Red Hot Peppers (Capsicum annum L.) Grown in Southeastern Anatolia Region

The aim of this study was to evaluate selected physico-chemical properties, ascorbic acid, and capsaicinoid (capsaicin, dihydrocapsaicin, norhydrocapsaicin, homodihydrocapsaicin, and total capsaicinoid) quantities of red hot pepper populations (Capsicum annum L.) grown in the South-Eastern Anatolia Region. Fresh and sun-dried red hot peppers and red hot pepper seed samples were collected from Kahramanmara?, pepper of Kahramanmara?; Gaziantep, pepper of Gaziantep; Kilis, pepper of Kilis; Diyarbak?r, pepper of Diyarbak?r; and ?anl?urfa, pepper of ?anl?urfa in the months of September through October 2010. The collected samples were analyzed in terms of certain quality parameters and capsaicinoid contents, while ascorbic acid amounts were determined only in fresh samples. All of the examined prameters were found to be significant statistically (P < 0.05). From the obtained results, it might be considered that these red hot pepper samples were suitable for cultivation due to their high-nutritional quality.     

天然辣椒红色素的研究进展

辣椒红色素是一种优质天然类胡萝卜素。广泛应用于食品、医药、保健品、化妆品及嗜好品工业中。本文综述了国内外辣椒红色素研究的理化特性、提取、分离纯化、分析测定等方法及应用前景。     

Determination of free and bound carotenoids in paprika (Capsicum annuum L.) by LC/MS

Received: 17 August 1999     

辣椒红色素的研究进展

辣椒红色素是一种优质天然类胡萝卜素。广泛应用于食品、医药、保健品、化妆品及嗜好品工业中。本文综述了国内外辣椒红色素研究的理化性质、稳定性、提取工艺及应用和生产现状，并对其发展前景作出了展望。     

Magnetic solid-phase extraction coupled with HPLC for the determination of Allura Red in food and beverage samples

A magnetic solid-phase extraction (MSPE) protocol prior to HPLC was developed for the extraction and determination of Allura Red in food samples. Magnetic nanoparticles were coated with tetraethylorthosilicate and 3-aminopropyltriethoxysilane and modified by graphene. Scanning electron microscopy, transmission electron microscopy and Fourier-transform infrared spectrometry were used to characterise the graphene-functionalised sorbents; and the main parameters affecting the extraction such as sample volume, temperature, pH and time were investigated and established. Under optimised conditions, the pre-concentration factor of Allura Red was 200, and the calibration curve was linear at a concentration range of 5–1500 μg kg^?1. The LOD was 2 μg kg^?1, the limit of quantification was 7 μg kg^?1, and the relative standard deviation was 3.3%. The prepared MSPE procedure was simple and fast, and it was successfully applied for the determination of Allura Red in beverages, candy and jelly.