Thanks for that, NMR chemist, you're an asset to the forum.
PCC? How shitty, and lazy... does the product smell of almonds? I thought I once figured a reagent test for this, but I kind of forgot what it was... Prussian blue related??
Or something like this: page 772, a hydroxamic acid test:
http://college.cengage.com/chemistr...5e/resources/qualitative_organic_analysis.pdf
Question is: who is going to perform such a test with anything but common drug reagents like Marquis?
Also:
https://erowid.org/archive/rhodium/chemistry/pcp.pcc.analysis.html Pitfalls of TLC analysis on this matter