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     The image on the top is that mass spectral data for the standard reference material for Uridine 5'-diphosphoGlucuronic acid (UDP-glucuronic acid) from Sigma.

     





Note the response times and abundance of the 245, 138 and 324 ions. This is the signature of UDP-glucuronic acid.














These are the ion responses of UDP-glucuronic acid. Compare these response times with those of Kombucha in the chromatogram below.

This is the mass spectral image of Kombucha.

 Note the difference in the response of the targeted ions from the response in UDP-glucuronic acid.

Note particularly the absence of the 138 and 245 ions which are so abundant in UDP-glucuronic acid.

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