Abstract: A method of making a resonant frequency circuit is disclosed. The method includes the steps of: (1) forming a first adhesive layer in a first predetermined pattern on a surface of a first substrate; (2) laminating a first conductive foil to the surface of the first substrate to form a first conductive layer; (3) forming a first portion of the first conductive layer in a shape generally corresponding to the first predetermined pattern; and (4) removing a second portion of the first conductive layer not corresponding to the first portion to establish a first conductive trace on the first substrate. A third conductive trace is formed on a third substrate. The third conductive trace is secured to the first conductive trace with a dielectric layer therebetween to form the resonant frequency circuit.

Abstract: A method and device for the detection of vapors of cocaine and associated compounds are disclosed. The method involves sampling a volume of air suspected of containing cocaine vapors, passing this air through a filtration system that removes any particulate matter and binds vapors of cocaine and associated compounds, if present, for further analysis. A preferred associated compound-vapor is that of ecgonidine methyl ester (EDME), and a marker for the presence of cocaine. The device is comprised of a sampling, filtration and vacuum port components and can be easily attached to a container, and suction source, for the sampling of air.