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 ℃.