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Vercruysse_Chlorogenic acid and amino acids.pdf (1.05 MB)
Preliminary Observations on the Interactions Between Chlorogenic Acid and Select Amino Acids
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This report presents our preliminary observations
regarding the interactions between chlorogenic acid and select amino acids or
tyramine. In most cases, these interactions resulted in the formation of a
green pigment in line with published reports. However, in the case of
tryptophan a green or red pigment was generated depending on the concentration
of tryptophan that was present. In the cases of serine or threonine the green
pigment that was generated in the first minutes of the reactions disappeared
entirely when the mixtures were kept reacting for longer periods of time. Published
reports indicate that the formation of the green pigment between chlorogenic
acid and amino acids involves a covalent interaction between both. In our
experiments we did observe the disappearance of chlorogenic acid during the
reactions but in the cases of tryptophan or tyrosine no decline in the
concentration of both amino acids could be observed. This was in contrast to
the reaction between chlorogenic acid and tyramine where the concentration of
both compounds declined while producing a green pigment.