Rifampicin, 500mg

1,2,3,7,8,9-Hexachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

2-Hydroxyatrazine, 100µg/mL in MeOH:AC (98:2),1ml

Dieldrin, 1000µg/ml in Hexane, 1ml