4?: Originally posted by wpc945 at 2013-04-19 15:20:48
???O???????x????,????????????? + 311,?????????γ?Dimer, ?t????+???????.

?????????o??x???Y????????,?????????r???f???@.

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6楼: Originally posted by ahryue at 2013-04-19 21:51:16
是耦合了，我们之前的就是144的出来了288的峰

5楼: Originally posted by CAS_小龙 at 2013-04-19 19:28:21
MS出311的其分子量为310（MS出M+)，当进样浓度过高时，很容易形成二聚体,即621。二聚体在质谱中很常见，尤其是在浓度过高时，另外还很容易出M+23(+Na），M+41（+乙腈，流动相为乙腈情况下），M+1（+H）。。。...

11?: Originally posted by larker at 2013-04-20 16:10:59
?????????????????????????????????????,,??311,328??????621,638????????????????У?????????...

7楼: Originally posted by larker at 2013-04-20 15:58:35
谢谢你的指点，可是我配的是2mg/ml，浓度还是很大吗...

15楼: Originally posted by 爱lingling at 2013-04-20 18:05:22
看样品的，既然有2倍体，就再稀点...