共查询到18条相似文献，搜索用时 46 毫秒
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HPLC检测葡萄酒中有效成分的研究进展 总被引：2，自引：0，他引：2
HPLC技术在葡萄酒中有效成分的检测试验中,应用广泛.论述了应用HPLC检测葡萄酒中的有机酸、酚类物质的研究进展,阐述了白藜芦醇、花色苷的HPLC的检测方法. 相似文献
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详细介绍了活菌计数法、滤膜法及显微计数法3种葡萄酒中微生物检验技术的检测方法和及其适用情况,对目前比较先进的PCR检测技术和脉冲电泳核型分析法检测葡萄酒中微生物的快速检测技术及其使用方法进行了简要介绍。 相似文献
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张春霞 《食品安全质量检测学报》2018,9(11):2762-2766
食品行业的安全问题一直是大众关心的焦点。在食品行业的发展中,化学添加剂被越来越多地应用到食品中,这加剧了食品化学污染程度,给人们的身体健康带来潜在危害。因此,对食品中的化学污染物进行检测是食品工程研究的重要领域,如何快速、高效地对食品化学污染物进行检测是社会各界十分关注的问题。本文介绍了多种仪器分析方法在食品化学污染物检测中的应用,对不同类型检测方法的应用原理和结论加以阐述,并对食品化学污染物检测进行展望,有助于促进食品安全检测方法的研究。 相似文献
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为了增强葡萄酒的色泽,商家可能会人为添加一些天然色素或合成色素来达到效果,尤其一些市售葡萄酒中违规添加了胭脂红、苋菜红、柠檬黄、日落黄、赤藓红、亮蓝等合成色素,危害了消费者的身体健康。因此,对葡萄酒中的色素(特别是合成色素)进行定性定量分析是很有必要的。本文简要介绍了葡萄酒中添加色素的种类,并对其定性、定量检测方法进行了简述,为葡萄酒中外来添加色素的检测提供参考。 相似文献
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李记明 《中外葡萄与葡萄酒》1993,(4):28-31
所谓"外源物质"是指非葡萄原料本身含有的或非发酵过程中产生的,而是人工添加的物质.加强对葡萄酒中外源物质的检测,对于提高葡萄酒声誉、打击假冒伪劣产品、向国际标准靠拢具有重要意义.兹撰写此文,供有关部门参考. 相似文献
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DIMITRA L. CAPONE GEORGE K. SKOUROUMOUNIS MARK A. SEFTON 《Australian Journal of Grape and Wine Research》2002,8(3):196-199
Deuterium-labelled trichloroanisole (d5 -TCA) added to the surface of wine corks in bottles did not contaminate wine after more than three years of bottle storage. Most of the added d5 -TCA was lost, presumably by evaporation. That remaining was largely confined to the outer portion of the closures. Under the conditions of this study, the cork closures were highly effective barriers to the transmission of exogenous TCA. 相似文献
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D.A. BARKER D.L. CAPONE A.P. POLLNITZ H.J. McLEAN I.L. FRANCIS H. OAKEY M.A. SEFTON 《Australian Journal of Grape and Wine Research》2001,7(1):40-46
Natural bark corks which were exposed to an atmosphere saturated with deuterium-labelled 2,4,6-trichloroanisole (d5 -TCA) absorbed the d5 -TCA rapidly. A commercially applied surface treatment did not prevent the ingress of the d5 -TCA into the corks. d5 -TCA was lost from contaminated corks by aeration relatively slowly. Nevertheless, the observation that TCA can be desorbed in this manner suggests that aeration, albeit under modified conditions, may yet prove useful in improving the quality of wine corks. Most of the absorbed d5 -TCA was localised in the outer 2 mm of the cork cylinder, but a significant amount migrated to the interior of the cork cylinder after as little as twenty-four hours of exposure. Significantly more d5 -TCA was found in the older growth compared to the younger growth bark after this time. 相似文献
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Maria Carla Cravero Federica Bonello Maria del Carmen Pazo Alvarez Christos Tsolakis Daniela Borsa 《Journal of the Institute of Brewing》2015,121(3):411-417
This work proposes a sensory method to verify the ‘cork taint’ defect in food and beverages. This off‐flavour has considerable economic impact in wine but occasionally can occur in other food and beverages. In wine, 2,4,6‐trichloroanisole (TCA) is generally considered to be the main compound responsible for this taint. It is an easily recognized compound because of its low sensorial threshold, and it is described as a mouldy and damp cardboard odour. This sensory method, developed in wine, consists of specific panel training to recognize TCA in a series of olfactory tests. The effectiveness of the panel was tested with contaminated wines in which the TCA content had been previously determined by Solid Phase Microextraction‐Gas Chromatography Mass Spectrometry (SPME‐GC/MS) analysis. This sensory method is useful to train a panel able to recognize the ‘cork taint’ defect in different situations (legal appraisals or quality assurance systems). The use of a reliable sensory assay can reduce the number of chemical analyses and the proposed method can be applied to other beverages such as beer. Copyright © 2015 The Institute of Brewing & Distilling 相似文献
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2,4,6-Trichloroanisole (TCA), which is a major cause of cork taint in bottled wine, is already present in the bark of living cork trees to the extent that it can account for the majority of incidences of cork taint in bottled wine. Other post-harvest sources of TCA are known and may add to the forest-derived TCA in cork. Both the origin of TCA in the bark in the forest, and the means by which additional TCA can accumulate in the corks during manufacture, have been examined. TCA can originate from 2,4,6-trichlorophenol (TCP) produced from naturally-occurring phenol and chlorine from sanitisers and cleaning products, and town water. Also, chlorophenol biocides have accumulated in the environment due to the large quantities used in previous times – TCP has been a minor impurity in pentachlorophenol biocides and a major ingredient in other preparations. There is some evidence that chlorophenols were used in pest management in the forest prior to restrictions on the use of these materials. The factors affecting the uptake and loss of TCA by the bark on the tree and by corks during production, and through to their use in the bottling of wine have been considered in this review. 相似文献
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J. JÄGER J. DIEKMANN D. LORENZ L. JAKOB 《Australian Journal of Grape and Wine Research》1996,2(1):1-7
Bacteria and yeasts were found to be present within cork lenticels, covered by mucous or fibrous substances. They survived heating, peroxide treatment and contact with the alcohol and sulfur dioxide of wine. 187 bacteria and 36 yeast strains were isolated from cork stoppers of wine bottles and, during various stages of production, from corkwood and new cork stoppers. After culturing, a number of isolates showed the ability to modify the aroma of model systems consisting of dilute or full strength wine and pulverised cork. The aromas produced by isolates of varying cork origin are tabled. A small number of isolates methylated 2,4,6-trichlorophenol, yielding 2,4,6-trichloroanisole, responsible for the typical cork taint. During the boiling of cork slabs, the internal temperature on the inside of a box made from cork slices did not exceed 87°C. 相似文献
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PETER GODDEN LEIGH FRANCIS JOHN FIELD MARK GISHEN ADRIAN COULTER PETER VALENTE PETER HØJ ELLA ROBINSON 《Australian Journal of Grape and Wine Research》2001,7(2):64-105
A Semillon wine was bottled using 14 different closures: a screw‐cap type, two grades of conventional natural cork, two ‘technical cork’ closures (natural cork with a synthetic component), and 9 closures manufactured from synthetic polymer material. Closure performance was evaluated for physical aspects (e.g. extraction force and energy, change in closure diameter, and ease of closure reinsertion), and for wine composition and sensory properties. Wine under the screw cap closure retained the greatest concentration of sulfur dioxide (SO2) and ascorbic acid and had the slowest rate of browning. For other closures the trend of SO2 loss relative to the screw cap closure was apparent from an early stage of testing, and was most evident in the group of synthetic closures, intermediate in the conventional corks, and least evident in the technical cork closures. The loss of SO2 was in general highly correlated with an increase in wine browning (OD420) and the concentration of SO2 in the wine at six months was a strong predictor of future browning in the wine, particularly after eighteen months. Neither the concentration of dissolved oxygen at bottling (0.6–3.1 mg/L), nor the physical closure measures were predictors of future browning. For several closures upright storage tended to accelerate loss of SO2 from the wine, but in many cases this effect was marginal. The closures differed widely in regard to physical characteristics, and in general synthetic corks appeared least ‘consumer‐friendly’ in terms of extraction forces, energies, and ease of closure re‐insertion, but there was a trend for natural cork closures to exhibit larger variability in physical characteristics than technical cork and synthetic closures. Sensory analysis indicated large differences in wine flavour properties, with closures which tended to result in the best retention of free SO2 having wine sensory scores for ‘citrus’ that were generally high whilst scores for the attributes ‘developed’/‘oxidised’ were low. The situation was reversed for wine under closures that performed poorly in the retention of free SO2. It was found that below a critical level of free SO2 remaining in the wine, closures exhibited substantially higher ‘oxidised’ aroma. Whilst trichloroanisole‐type (TCA) taint was a noticeable problem for some cork and technical cork closures, any plastic‐type taint appeared not to be a problem with most synthetic closures. 相似文献
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The compounds causing cork taint and the factors affecting their transmission from cork to wine are discussed. These factors include: the solubilities of the taint compounds in wine, their affinity for the surface and the interior parts of the cork; their location on the surface of and within the closure; the rates at which they can migrate through the cork matrix; the volume of wine in contact with a closure(s); and whether taint transmission is taking place in bottled wine or with corks soaked in wine for screening purposes. 2,4,6‐Trichloroanisole (TCA) has been the primary topic of investigations reported in the general literature and is therefore the main focus of this article. 相似文献
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本文介绍了葡萄酒和软木塞中2,4,6-三氯苯甲醚（2,4,6-trichloroanisole,TCA）的来源及影响,分析了2,4,6-三氯苯甲醚的检测难点,总结了目前检测2,4,6-三氯苯甲醚方法的总体趋势及现状。按照前处理方法的原理分类,介绍了前处理方法的定义、特点,并概述和讨论了前处理方法在萃取葡萄酒和软木塞中2,4,6-三氯苯甲醚中的应用;根据仪器检测方法的不同特点,总结和讨论了仪器检测方法在分析检测葡萄酒和软木塞中2,4,6-三氯苯甲醚的应用。前处理方法和仪器检测方法相结合,达到了浓缩和检测葡萄酒和软木塞中2,4,6-三氯苯甲醚的目的。 相似文献