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zybpxy鐵桿木蟲 (著名寫手)
致齋大人
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[求助]
關(guān)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(xiàn)中采用FID檢測(cè)器進(jìn)行檢測(cè),并用了sigma的混標(biāo)進(jìn)行定性。請(qǐng)問如何得知混標(biāo)中37種脂肪酸甲酯的出峰時(shí)間呢? 小弟的柱子是DB-5 下附文獻(xiàn)及標(biāo)品網(wǎng)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(biāo)品網(wǎng)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)
金蟲 (小有名氣)
鐵桿木蟲 (著名寫手)
致齋大人

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