昨天做了个样品全扫描图,但是用masshunter工作站中NIST谱图库检索的时候发现成分值得怀疑,
和文献(基峰m/z=192)有差异?
文献原文是:The spectra of the 8,13-epoxy-bridged labdanoids
(115-120) all display a base peak at m/z 192. Thecorresponding ion is likely to arise, as shown in Scheme R for
12-0x0-manoyloxide (119, Fig. 18), by a cyclic fragmentation process.
Subsequent loss of a methyl radical explains the formation of the abundant ionof mass 177.
还请老师能帮忙看看这到底是什么成份,
Rt=25.544 处到底是什么成份?是下面115#这种成份吗?