Do you know what the explosives tests are looking for? It occurs to me that people make explosives out of fertilizer, which I think means that almost anything with an ammonia component could cause a positive result.
I also wonder how the tests are typically interpreted. Several 'test strip' type chemical tests require the tester to evaluate a color against a sample spectrum, where different intensity or hue identifies the strength of the result. Is this the kind of testing performed or do they have some sort of machine on site or what?
Edit: there is a link to a sample machine in the rebuttal post. It's this:
I don't know anything about these, but my first reaction is skepticism. It has reusable wipes for lower TCO, but the test involves using a wipe and then testing the wipe. Unless the test self-sterilizes or something then it seems like it would be easy to have false positives due to contaminated wipes. Hopefully this machine, if it's the one being used, is just for indicating whether further followup by the "Transportation Security Specialist - Explosives (TSS-E)" is required.
I also wonder how the tests are typically interpreted. Several 'test strip' type chemical tests require the tester to evaluate a color against a sample spectrum, where different intensity or hue identifies the strength of the result. Is this the kind of testing performed or do they have some sort of machine on site or what?
Edit: there is a link to a sample machine in the rebuttal post. It's this:
http://www.sds.l-3com.com/etd/opt-ex.htm
I don't know anything about these, but my first reaction is skepticism. It has reusable wipes for lower TCO, but the test involves using a wipe and then testing the wipe. Unless the test self-sterilizes or something then it seems like it would be easy to have false positives due to contaminated wipes. Hopefully this machine, if it's the one being used, is just for indicating whether further followup by the "Transportation Security Specialist - Explosives (TSS-E)" is required.