对反应液进行液质定性分析产物的组成,发现色谱中某些峰在质谱总离子流图中消失了,如下图所示,5.61的色谱峰在质谱中消失了,10.02的色谱峰在质谱中减弱了。
这是什么原因,出现这一情况说明了什么?
注: Experimental conditions of the HPLC-MS technique: separations were performed at 25℃on a SB-Phenyl column from Agilent using a mobile phase 80% formic acid/20% acetonitrile. Scan type was negative TOF MS. The APCI vaporizer temperature was 450 ℃.
![](http://ng1.17img.cn/bbsfiles/images/2011/12/201112201336_339653_1964789_3.jpg)