Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
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Chiral Recognition of Carboxylic Acids by ESI Mass Spectrometry
Masami SAWADA, Sachiyo NOMURA, Yoshitaka MIYAMOTO, Natsu EGAWA, Motohiro SHIZUMA, Hitoshi YAMADA, Yoshio TAKAI, Juichi TANAKA, Hiroshi YAMAOKA
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Keywords: Chiral recognition, ESIMS, Chiral carboxylic acid, Metal ion, Deuterium labeling
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2004 Volume 52 Issue 3 Pages 154-157

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Abstract
Chiral recognition of carboxylic acids has been achieved using a “host-metal-guest complexation system” by the ESIMS/EL-guest method. The system consists of a nitrogen-containing acyclic host, La(NO3)3, and carboxylic acids. Chiral recognition in the system is evaluated by the IRIS value, which is defined by the relative peak intensities of the corresponding host-metal-guest complex ions:
IRIS = I [(H-La+3-GR-1(Gref-1))+1] / I [(H-La+3-GS-dn-1(Gref-1))+1]
The IRIS values vary from 0.62 to 1.61 and a quantitative cross chiral relationship satisfactorily holds.
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© 2004 by The Mass Spectrometry Society of Japan
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