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<p>[QUOTE=&quot;desertgem, post: 2848844, member: 15199&quot;]Well I do not possess info on the chemical composition of Thad&#039;s compounds, but yes, within the realm of nature, all things can vaporize, just not all at the operating conditions. If in &#039;sniffing&#039; the machine also emits a laser beam with heat enough to vaporize material on the surface before sniffing, or a heating element to raise the temp of the coin several hundred degrees, I would agree with you. But I am sure they wouldn&#039;t try this as many deleterious problems could result. At room temp or close, many substances, once the carrier solution has evaporated, can not be detected airborne. This is why many &#039;sniffers&#039; working in airports or immigration centers use &#039;wipes&#039; to dissolve surface materials to get the surface material volatile again. Some of the newer detection guns are emmissive, using beams of radiation to excite the surface molecules, but again I would suspect there would be complaints from customers if TPGs used such, . Of course I do not know what Thad uses , and I suspect it is proprietary. IMO as I understand it, Jim[/QUOTE]</p><p><br /></p>

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