Replies to post #40473 on Cdex, Inc. (fka CDEX)

[Crow3]

Lots of ways to simulate a desired response. In the ELF days he pointed it a bucket of sand and got a red light if benign, a green light if there were explosives within.

Such easily arranged indications got more sophisticated later. But still the same principle.

If the demonstrator has a kind voice, warm and friendly, a wee sense of humor, a grandfatherly look, white hair and such, so much the better.

[d4diddy]

Yep, without the cuvettes things get very difficult, more so for measuring molar concentration than drug ID.

Drug ID in containers using Raman spectroscopy is quite common.

Simutaneouly using Raman spectroscopy and fluoresences also creates interference issues since the Raman signal is relatively weak compared to the fluorescent signal. That could be a problem if that's what they're trying to do.

With the cuvettes, it allowed UV/IR absorption measurements which can determine molar concentration. That is how I suspect the older Valimeds worked, but you can't do that without a cuvette.

I believe that there's other issues with the drug containers too, some of which are just beginning to come to light.