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zybpxy鐵桿木蟲 (著名寫手)
致齋大人
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[求助]
關于脂肪酸GC及GC-MS定性的問題 已有1人參與
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待分析樣品:淡水魚肌肉脂肪酸組成; 文獻中采用FID檢測器進行檢測,并用了sigma的混標進行定性。請問如何得知混標中37種脂肪酸甲酯的出峰時間呢? 小弟的柱子是DB-5 下附文獻及標品網址 Approximately 50–100 mg lipids were then used for lipid class determinations by gas chromatography. Fatty acid methyl esters (FAME) were prepared by transesterification with borontrifluoride (BF3) in methanol at 70 °C. FAME was run on an Shimadzu GC-2010 gas chromatograph equipped with aflame ionization detector, a fused silica capillary column (30 m × 0.25 mm ID × 0.3 μm film, FFAP, Dalian Institute of Chemical Physics Chinese Academy of Sciences) and GC solution software. Hydrogen was used as the carrier gas (flow velocity: 1.0 ml min− 1). The injector temperature was adjusted to 260 °C, and the column temperature was increased from 160 °C to 230 °C at a rate of 2.0 °C min− 1 and then held at 230 °C for 15 min. The detector was maintained at 230 °C. The identifications of fatty acids were based on comparisons of retention times with known FAME standard mixtures (a 37-component FAME mix and menhaden oil, Sigma, Chemical Co, USA). 標品網址:http://www.sigmaaldrich.com/cata ... ng=zh®ion=CN |

鐵桿木蟲 (著名寫手)
致齋大人

木蟲 (正式寫手)
鐵桿木蟲 (著名寫手)
致齋大人

金蟲 (小有名氣)
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