Perfluorokerosine. Useful internal reference for negative ion mass spectrometry
Perfluorokerosine. Useful internal reference for negative ion mass spectrometry
复制标题
全氟煤油。
DOI：
10.1021/ac60262a031
复制
发表时间：
1968
影响因子：
7.4
通讯作者：
L. H. Thompson
中科院分区：
文献类型：
--
作者：
R. Gohlke;L. H. Thompson
我们希望报告，全氟钾离子（PFK）提供了一个负离子光谱丰富的离子的有用丰度超过一个质量范围从m/e 19延伸到至少m/e 940。由于离子的m/e值在非全氟化合物中并不常见，因此PFK被用作内部m/e参考，方法是将其与所研究的化合物一起送入质谱仪。从表I中可以看出，在m/e 220至800的范围内，任何未知离子峰总是被一对PFK峰包围，其中一个峰永远不会超过6个质量单位。PFK的两种级分可从哥伦比亚有机化学品公司获得，股份有限公司、哥伦比亚、S. C.-高沸点和低沸点。我们发现前者更有用，因为它的质量范围更宽。
We wish to report that perfluorokerosene (PFK) provides a negative ion spectrum rich in ions of useful abundance over a mass range extending from m/e 19 to at least m/e 940. Because the ions occur at m/e values which are not commonly found in nonperfluorinated compounds, the PFK is used as an internal m/e reference by admitting it to the mass spec-trometer with the compound under investigation. As can be seen from Table I, in the m/e range 220 to 800, any unknown ion peak is always bracketed by a pair of PFK peaks, one of which is never more remote than 6 mass units. Two fractions of PFK are available from Columbia Organic Chemicals Co., Inc., Columbia, S. C.—high boiling and low boiling. We find the former more useful because of its wider mass range.