Multiresidue determination of 11 new fungicides in grapes and wines by liquid–liquid extraction/clean-up and programmable temperature vaporization injection with analyte protectants/gas chromatography/ion trap mass spectrometry Rosa M. González-Rodríguez, Beatriz Cancho-Grande and Jesús Simal-GándaraJournal of Chromatography AVolume 1216, Issue 32, 7 August 2009, Pages 6033-6042 AbstractA gas chromatographic ion trap mass spectrometry (GC-ITMS) method was developed for the determination of 11 new generation fungicides (benalaxyl, benalaxyl-M, boscalid, cyazofamid, famoxadone, fenamidone, fluquinconazole, iprovalicarb, pyraclostrobin, trifloxystrobin and zoxamide) in grapes and wines. Samples were extracted with ethyl acetate:hexane (1:1, v/v) and cleaned-up with graphitized carbon black/primary secondary amine (GCB/PSA) solid-phase extraction (SPE) cartridges using acetonitrile:toluene (3:1, v/v) as eluent. The addition of analyte protectants (3-ethoxy-1,2-propanediol, d-sorbitol and l-gulonic acid γ-lactone) in the final extracts allowed to avoid the matrix-induced response enhancement effect on quantitation process with absolute recoveries ca. 100%. Precision (expressed as relative standard deviation) was lower than 16% for all fungicides. Limits of detection and quantitation were lower than 0.01 mg/kg or mg/L, except for cyazofamid, much smaller in all cases than maximum residue levels (MRLs) established by European Union for grapes and by Switzerland and Italy for wines. The proposed method was applied to determine fungicide residues in three different white grapes for vinification produced in Ribeiro area in Galicia (NW Spain), as well as in their corresponding final wines.

衬管的价格也是不便宜的啊，每次更换新的好像负担很大啊。

这个仪器的原理是怎样的，结果准确度和什么方法可以比较呢？

快乐发布的这个很有借鉴意义的！

运行肯定是正常的 有没有效果就难说了 不管你们信不信 我是信的

怎样能知道方法允许偏差是多少啊？

可以找个翻译软件或翻译网站,慢慢看,大致也能看个差不多.

标准的及时更新是很重要的，要经常上网做一下检索。从发布者的角度，我觉得中国的标准发布不够透明，经常是有新的标准了但是很多人都不知道。等到知道了新标准才发现已经实施有好一段时间了。可是在网络上搜发现还是没有更新。造成很多不便。

当然是全部都要拉

没听说过，你说得无非是去除水分，别的设备可代替

三聚氰胺事件后，相应的国标中有规定

索氏抽提后的样品，有150ml吧

出问题的环节可能性太多了,说的清楚一些,尤其是进样口处.另外,要说的是,6820不适合做农残用.

7、食品质量感官鉴别对何场所的要求 食品质量感官鉴别既可以在实验室进行，又可以在购物现插进行，还可以在评比、鉴定会场合进行。由于它的简便易行、可靠性高、实用性强，目前已被国际上普遍承认和来用，并已日益广泛地应用于食品质量检查的实践中。

1、农残80余种2、前处理方法NY761、QuEChERS多残留一齐分析法3、所用的仪器和检测器GC-ECD、FPD、MS、FID、LC-UV、荧光、LC-MS/MS

有相应的标准吧？参照标准进行。

不接柱子，1.0流速走纯甲醇压力4.0Mpa，应该很正常，但是一接柱子就马上飙升到10。断检测器，压力改变不明显，柱子才用第二次，我怀疑是不是管线和柱子的接口有问题，很有可能

这个或多或少都会有影响的，通风橱操作，还有就是自己平时注意点

没人响应啊

保健食品只适合特殊人群食用