Lab testing your powder

Just read WL's underground and if he's trying to scare the shyt out of me it worked. A UGL owner was asked what was the scariest thing he incountered in the biz he said it was a batch that was partly cloudy, so they sent it to the lab and the results were that it was cut with a polymer. (I assume they did the melting point test before they put it vials) I imagine lab test can be costly and legally risky, but has anyone ever had their powder tested in a lab?
 
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