Lanthanide Label Array Method for Identification and Adulteration of Honey
and Cacao
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Abstract
A generic,
cost-effective, and simple method has been developed
to fingerprint liquids to differentiate food brands and ingredients.
The method is based on a label array using nonspecific long lifetime
unstable luminescent lanthanide labels. The interaction between the
liquid sample and the label is typically detrimental to the luminescence
of the unstable chelate leading to a sample-dependent luminescence-intensity
array. The label-array method is a unique approach as the array of
unstable chelates is extremely inexpensive to produce and possesses
high sensitivity due to spectral as well as unstable structural properties
of the lanthanide label. The global method has been applied to distinguish
commercial honey and cacao brands to demonstrate its feasibility as
honey and cacao are among the most adulterated food products