Abstract:
: The rapidly emerging interest in the evaluation
of biogenic amines especially spermidine and spermine has
brought up new demands for the efficacious technical
methods. These volatile amines are abundantly present in
protein containing food items and indicate the quality of food
products. An optical method relying on the efficient
application of Cu2+ complex of organic nanoparticles
(ONPs) for the simultaneous quantification of spermidine
and spermine in vapors and aqueous phase has been detailed.
The method allows visual naked-eye determination as the
color of the aqueous solution of ONPs−metal complex
changes, respectively, upon the additions of spermidine and
spermine individually. The metal complex was further
quantitatively titrated for examining a linear relation of absorbance with respect to increasing concentrations of spermidine
and spermine, where corresponding detection limits for both analytes were found to be 35 and 36.2 nM, respectively. Eventually,
the real sample application of proposed sensor was explored using food articles (mushroom and meat), and we observed the
modulation in chromogenic signals; i.e., there was a change in color of the sensor with vapors of biogenic amines emitted from
food articles on storage.
