共查询到19条相似文献,搜索用时 140 毫秒
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综述了啤酒中嘌呤类物质的几种测定方法,同时介绍了啤酒样品测定前的几种预处理方法,包括啤酒中二氧化碳的去除方法和啤酒中嘌呤类物质的几种水解方法. 相似文献
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建立了高效液相色谱法测定啤酒中嘌呤类物质含量的分析方法.啤酒中的嘌吟类物质经高氯酸水解成嘌呤碱,其优化水解条件为:啤酒:高氯酸为1:1,100℃水解30min.优化色谱条件为:采用EclipseXDB-C18反相色谱柱,以0.02mol/L的KH2PO4-H3PO4的缓冲溶液(pH4.00)为流动相,流速1.0mL/min,检测紫外波长为210.4nm,柱温为25℃.结果表明.在优化的色谱条件下,4种嘌呤碱的平均加标回收率为92.91%~102.48%,方法精密度为4.51%~5.47%.该方法的灵敏度高、操作简便、快速,能够满足啤酒中嘌呤类物质的高灵敏分析. 相似文献
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反相离子对色谱法测定啤酒中的嘌呤类物质 总被引:6,自引:0,他引:6
利用反相离子对色谱法(RP-IPC)对啤酒中的腺嘌呤(Ade)、鸟嘌呤(Gua)、黄嘌呤(Xan)和次黄嘌呤(Hyp)等4种嘌呤类物质的测定方法进行了研究。结果表明,当检测波长254nm,流动相为水:甲醇:冰乙酸:四丁基氢氧化铵为883.5:100:15:1.5(V/V/V/V),流速为1ml/min时,方法精密度为1.41%~2.42%,测得四种嘌呤物质的回收率在91.2%~100.3%之间。啤酒中的含嘌呤类物质需要经高氯酸水解成嘌呤,经优化的水解条件为啤酒:高氯酸为1:2、100℃水解30min。 相似文献
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引言:痛风是一种尿酸代谢失调引起的疾病,而尿酸的主要生成途径是嘌呤物质代谢的。啤酒嘌呤含量虽然并不高,但它与海鲜同食,会促进嘌呤的吸收,生成大量尿酸,所以生产低嘌呤啤酒是很多啤酒企业的研究课题之一。现在国内生产低嘌呤啤酒主要通过后期吸附作用,去除啤酒中的嘌呤物质,使嘌呤含量控制在20mg/L以下, 相似文献
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目的 建立市售啤酒中嘌呤含量的评价指标。方法 采用反相离子对色谱法对16种市售啤酒中嘌呤含量进行检测。结果 游离嘌呤碱基含量为5.72~26.52 mg/L,嘌呤核苷含量为40.14~135.56 mg/L,总嘌呤碱基含量为31.69~92.66 mg/L。游离嘌呤碱基和嘌呤核苷两部分之和与总嘌呤碱基含量间存在非常显著相关关系,相关系数为0.985(P<0.01)。结论 以游离嘌呤碱基和嘌呤核苷为指标,可以满足不同啤酒间嘌呤含量的评价,检测方便快捷且能更好地反映啤酒中主体嘌呤物质。 相似文献
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高效液相色谱法测定麦汁、发酵液和啤酒中的嘌呤含量 总被引:7,自引:0,他引:7
通过高效液相色谱法测定了不同浓度的麦汁、发酵液及成品啤酒中的嘌呤含量,分析了嘌呤在发酵过程中的变化情况。此外,还分析了不同辅料比的麦汁中嘌呤含量的差异,发酵液中含有酵母与不含有酵母时检测的差异性,以及活性碳吸附对啤酒中嘌呤含量的影响。该研究为开发低嘌呤啤酒提供了可靠的检测方法和研究思路。 相似文献
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Heuberger AL Broeckling CD Lewis MR Salazar L Bouckaert P Prenni JE 《Food chemistry》2012,135(3):1284-1289
The effect of temperature on non-volatile compounds in beer has not been well characterised during storage. Here, a metabolomics approach was applied to characterise the effect of storage temperature on non-volatile metabolite variation after 16weeks of storage, using fresh beer as a control. The metabolite profile of room temperature stored (RT) and cold temperature stored (CT) beer differed significantly from fresh, with the most substantial variation observed between RT and fresh beer. Metabolites that changed during storage included prenylated flavonoids, purines, and peptides, and all showed reduced quantitative variation under the CT storage conditions. Corresponding sensory panel observations indicated significant beer oxidation after 12 and 16weeks of storage, with higher values reported for RT samples. These data support that temperature affected beer oxidation during short-term storage, and reveal 5-methylthioadenosine (5-MTA) as a candidate non-volatile metabolite marker for beer oxidation and staling. 相似文献
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果啤与啤酒组分差异比较研究 总被引:1,自引:0,他引:1
采用气相色谱和高效液相色谱的分析方法,分析了市售同一品牌菠萝果啤、啤酒的风味成分、有机酸、糖的组成及含量,结果表明,果啤中酯含量类物质的种类相对普通啤酒丰富,组成协调,高级醇含量低。有机酸含量果啤高于啤酒,柠檬酸积累较多。果啤中蔗糖消耗大,而果糖和葡萄糖含量有所升高。 相似文献
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BACKGROUND: It has been claimed that beer is one of the richest sources of silicon in the diet; however, little is known of the relationship between silicon content and beer style and the manner in which beer is produced. The purpose of this study was to measure silicon in a diversity of beers and ascertain the grist selection and brewing factors that impact the level of silicon obtained in beer. RESULTS: Commercial beers ranged from 6.4 to 56.5 mg L?1 in silicon. Products derived from a grist of barley tended to contain more silicon than did those from a wheat‐based grist, likely because of the high levels of silica in the retained husk layer of barley. Hops contain substantially more silicon than does grain, but quantitatively hops make a much smaller contribution than malt to the production of beer and therefore relatively less silicon in beer derives from them. During brewing the vast majority of the silicon remains with the spent grains; however, aggressive treatment during wort production in the brewhouse leads to increased extraction of silicon into wort and much of this survives into beer. CONCLUSION: It is confirmed that beer is a very rich source of silicon. Copyright © 2010 Society of Chemical Industry 相似文献
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关于控制啤酒乙醛含量的研究进展 总被引:1,自引:0,他引:1
乙醛是啤酒中重要的风味物质之一,但过量的乙醛会使啤酒产生像青草或苹果腐烂的味道。降低啤酒中的乙醛含量是啤酒工业当前的目标之一。该文综述了乙醛的性质,乙醛在啤酒发酵和贮存老化时期的代谢过程,发酵条件对乙醛含量的影响,以及对控制啤酒中乙醛含量研究的进展。 相似文献
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采用气相色谱分析法,主要考察了山毛榉木片、多孔陶瓷和海藻酸钠3种固定化酵母载体对啤酒风味物质成分的影响。结果表明,不同固定化酵母载体对啤酒风味物质成分的形成有较大影响,其中海藻酸钠载体固定化酵母的牢固程度最好,且载体正丙醇、异丁醇和异戊醇含量分别高于成品啤酒9%、8%和12%,啤酒含醇量较高,适于醇厚型啤酒发酵;山毛榉木载体生成的酯类物质较多,载体乙酸异丁酯、乙酸乙酯、乙酸异戊酯和己酸乙酯含量分别高于成品啤酒20.1%、14.3%、12.5%和17.4%,含酯量较高,适于淡爽型啤酒发酵;与另两种载体相比,多孔陶瓷载体双乙酰含量达到0.14 mg/L,不适合用于啤酒发酵。 相似文献