QuEChERS IS standard no. 6

RCS-4meta N-(5-hydroxypentyl) metabolite, 50µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 142326-04-2

Aldrin (as Cl), 0.1mg/L

(±)-Cathinone-d5 hydrochloride,100 µg base/mL,MeOH,1mL,