血清GC/MS谱峰求助?血清GC-MS代谢组学,方法如下,先加乙腈沉淀蛋白,100uL血清在氮气氛下吹干。衍生化方法如下,加80uL20mg/mL 甲氧胺 吡啶 溶液,30℃水浴90min,然后加入80uLMSTFA,70℃下水浴60min,最后取上层清液转移至气相内插管做GC/MS。空白:不加血清,试剂同上GC/MS型号Agilent 7890A/5975C,参数如下,柱子DB-5MShelium as the carrier gas at a constant flow rate of 1.0 mL/min. The temperature of injection, transfer interface, and ion source was set to 270, 260, and 200 °C, The GC temperature programming was set to 2 min isothermal heating at 80 °C, followed by 10 °C/min oven temperature ramps to 180 °C, 5 °C/min to 240 °C, and 25 °C/min to 290 °C, and a final 9 min maintenance at 290 °C.Electron impact ionization (70 eV) at full scan mode (m/z 30-600) was used, with an acquisition rate of 20 spectra第一个图为空白试剂第二个为血清。从图谱上看这两张图看起来很像,貌似血清 代谢物 很少,请教大家一下是什么原因查看更多6个回答 . 1人已关注