【歐啦啦】評論
positive mode electrospray ionization:主峰應出現在M+1negative mode electrospray ionization:主峰應出現在M-1Electrospray Ionization MethodAmong the most used spray ionization techniques is Electrospray Ionization (ESI). This technique continues to be the method of choice for analyzing thermolabile chemicals. Its capabilities are well documented. It uses an electrical stress between the ESI probe exit (e.g. capillary) and the counter electrode, which is located few millimeters from the probe. The process results in the generation of highly charged droplets directly from the infused solution. Mu...
【我愛正妹老師嚴精鳳】評論
PICI基峰會是M+1 NICI則不變PICI:圖上數值2 且都大於分子離子峰(因使用試劑甲烷、異丁烷、氨)NICI:圖上數值=2個參考範例107-125.附圖為psoralen(MW = 186)的氣相層析-質譜分析結果,其採用的離子化(ionization)方法為為: (A)electrospray ionization(B)electron impact ionization (C)positive ion chemical ionization (D)negative ion chemical ionization答案:C106-121.Psoralen(MW= 186)的質譜分析結果如附圖所示時,其採用的離子化(ionization)方法最可能為下列何者? (A)positive ion chemical ionization (B)electron impact ionization (C)electrospray ionization (D)negative ion chemical ionization答案:(D...
【韓國魚】評論
PICI基峰會是M+1 NICI則不變PICI:圖上數值2 且都大於分子離子峰(因使用試劑甲烷、異丁烷、氨)NICI:圖上數值=2個參考範例107-125.附圖為psoralen(MW = 186)的氣相層析-質譜分析結果,其採用的離子化(ionization)方法為為: (A)electrospray ionization(B)electron impact ionization (C)positive ion chemical ionization (D)negative ion chemical ionization答案:C106-121.Psoralen(MW= 186)的質譜分析結果如附圖所示時,其採用的離子化(ionization)方法最可能為下列何者? (A)positive ion chemical ionization (B)electron impact ionization (C)electrospray ionization (D)negative ion chemical ionization答案:(D...
【talazoparib】評論
整理歷屆快速判別法先判斷使用GC或LC,在此MS串聯為使用LCCI:GC離子化用PICI:M+1 (107-1) 或 M+29(+C2H5+) , M+41(+C3H5+)NICI:M (106-1) 或 M+32 (捕捉氧)ESI:LC離子化用Positive mode:M+1 (108-1)Negative mode:M-1 (下次等他考...)
【Jhuyu】評論
PICI:M+1 NICI:M不變