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• 2018-12-02 23:51发布了问答

  高分悬赏，会人工英语翻译的进~~~

  AnalyticalMethodsofVolatileAnalysisManyanalyticalmethodshavebeenusedforthesamplingandisolationofvolatilecompoundsgeneratedduringlipidoxidation.Sampling，usingmethodssuchas... Analytical Methods of Volatile Analysis Many analytical methods have been used for the sampling and isolation of volatile compounds generated during lipid oxidation. Sampling， using methods such as extraction， headspace analysis， and solid-phase microextraction (SPME)， offers a means to collect and often pre-concentrate volatiles from samples. Isolation allows the separation of the extracted volatiles and is often accomplished using gas chromatography (GC) or high-pressure liquid chroma- tography (HPLC). Aromatic compounds are produced in low con- centrations at the onset of lipid oxidation， thereby requiring a method that not only isolates the compounds， but concentrates them. In addition， food provides a complex matrix from which to extract the compounds. Several studies have addressed the bind- ing of lipid oxidation products to proteins (O’Keefe and others 1991; Gutheil and others 1992). These bound compounds need to be liberated before the oxidation products can be accurately quantified. Sample preparation can complicate the assessment of lipid oxidative status as a number of these lipid oxidation prod- ucts are thermally generated. Care must be taken to extract the compounds present in the sample while not generating additional oxidation products or allowing the volatile compounds to de- grade during the extraction process. The most common procedures reported in the literature for the determination of lipid oxidation products from muscle foods are GC methods. In this review， sampling methodologies of distillation and solvent extraction， and isolation methods associated with GC and HPLC analyses will be discussed. Within those gas chromato- graphic methodologies， static HS， dynamic purge-and-trap HS， and solid-phase microextraction (SPME) will be addressed. A summary of the different isolation methods is presented in Table 1. 只要翻译的通顺即可。虽然长了点，可是80分还是值得的吧 展开

  305人看过

• 2018-12-01 18:10发布了问答

  液相色谱仪检测辣度不出峰

  液相色谱仪检测辣度不出峰

  272人看过

• 2018-11-21 02:48发布了问答

  离子色谱法测定食品中亚硫酸盐比分光光度法有何优点

  　

  294人看过

• 2017-10-13 23:11发布了问答

  气相色谱中，色谱柱内径的选择根据什么？

  　

  420人看过

• 2017-04-18 07:56发布了问答

  色谱分析中常用的定量分析方法有哪几种

  　

  838人看过

• 2016-01-07 19:39发布了问答

  气相色谱仪老化一般要多久才能完成

  　

  359人看过

• 2015-06-02 08:55发布了问答

  气相色谱仪烧柱子汽化，检测要调多少度?型号是9790

  　

  460人看过

• 2012-06-25 17:44发布了问答

  气相与液相色谱的基本设备有哪些

  　

  253人看过

• 2011-11-21 00:14发布了问答

  气相色谱FID检测器是怎样收集信号的?

  　

  228人看过

• 2011-05-30 01:45发布了问答

  气相色谱检测器有哪些？

  　

  721人看过

• 2010-12-24 19:10发布了问答

  中钞特种防伪科技有限公司待遇怎么样呀，硕士进去年薪多少？自动化硕士

  　

  239人看过

• 2010-10-06 14:22发布了问答

  GX液相色谱法与气相色谱法的有哪些异同点

  GX液相色谱法与气相色谱法的有哪些异同点... GX液相色谱法与气相色谱法的有哪些异同点 展开

  621人看过