Acetylsalicylic acid, 100 µg/ml, Acetonitrile, 1

L-Glutamic-d5 acid, 1000µg/ml in 0.1M HCl, 1ml

4,6-Dihydroxypyrazolo[3,4-d]pyrimidine-13C,15N2, 1mg

Herbicides Mix #2 - Free Acids