Tri-p-tolyl phosphate, 1.2ml x 50ug/ml, toluene

Acetic acid, 1ml

Caffeine, 100µg/ml in MeOH, 1ml

2,4-Dimethyl acetic acid methyl ester, 100µg/mL, Solvent-MTBE, Unit 1mL, # of units-1, Cas.no. 55954-23-9