Library Search Yields Identification
The use of the Spectral Library for peak identification is demonstrated
by the chromatogram shown, which was obtained from a low cost “lemonade”
style soft drink.
Comparisons were made between the UV spectra of the eluted peaks,
with those of reference spectra which had been previously scanned
and stored in the Spectral Library.
Overlay of these scans after normalisation indicated that these
peaks were identical with Citric Acid (Peak 3), Saccharin (Peak
5), Aspartane (Peak 7) and Benzoic Acid (Peak 9).
Retention times for the major components coincided with those of
the library spectra confirming the identifications.
The scan of Peak 9 is overlayed with the Library Spectrum of Benzoic
Acid to show the very high quality of the spectral match obtained.
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