A MASS SCALE BASED ON CH2=14.0000 FOR HIGH RESOLUTION MASS SPECTROMETRY OF ORGANIC COMPOUNDS
A MASS SCALE BASED ON CH2=14.0000 FOR HIGH RESOLUTION MASS SPECTROMETRY OF ORGANIC COMPOUNDS
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DOI：
10.1021/ac60206a048
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发表时间：
1963-01-01
影响因子：
7.4
通讯作者：
KENDRICK, E
中科院分区：
文献类型：
--
作者：
KENDRICK, E
计算、存储和检索有机化合物质谱中可能出现的许多元素组合的精确质量的问题是相当大的。它们可以通过采用质量标度来显著减少，其中CH2自由基的质量取为14000质量单位。这种尺度的优点是不同的一个或多个CH2基团的离子具有相同的质量缺陷。例如，一系列烷基萘母峰的精确质量为127.9195、141.9195、155.9195等。由于相同的质量缺陷，这些峰的相似起源无需参考质量表即可识别。H、C12、C13组合质量缺陷表
The problems of computing, storing, and retrieving precise masses of the many combinations of elements likely to occur in the mass spectra of organic compounds are considerable. They can be significantly reduced by the adoption of a mass scale in which the mass of the CH2 radical is taken as 14.0000 mass units. The advantage of this scale is that ions differing by one or more CH2 groups have the same mass defect. The precise masses of a series of alkylnaphthalene parent peaks, for example, are 127.9195, 141.9195, 155.9195, etc. Because of the identical mass defects, the similar origin of these peaks is recognizable without reference to tables of masses. Tables of the mass de-fects for combinations of H, C12, C13,