CPC G01N 33/58 (2013.01) [G01N 27/127 (2013.01)] | 7 Claims |
1. A label, comprising:
the label associated with an article; and
a chemical tag comprising a plurality of identifiable analytes, wherein a vapor signature of the plurality of identifiable analytes identifies a characteristic of the article, wherein the chemical tag is not inherently associated with the article,
wherein the plurality of identifiable analytes do not comprise a fluorocarbon.
|