"I believe it will have to be "certified" that a positive is in fact meth and what are the probabilities of errors." Methamphetamine- <A HREF="http://en.wikipedia.org/wiki/Methamphetamine" target="_blank">http://en.wikipedia.org/wiki/Methamphetamine</A> Amphetamine- <A HREF="http://en.wikipedia.org/wiki/Amphetamine" target="_blank">http://en.wikipedia.org/wiki/Amphetamine</A> Ephedrine- <A HREF="http://en.wikipedia.org/wiki/Ephedrine" target="_blank">http://en.wikipedia.org/wiki/Ephedrine</A> Pseudoephedrine- <A HREF="http://en.wikipedia.org/wiki/Pseudoephedrine" target="_blank">http://en.wikipedia.org/wiki/Pseudoephedrine</A>