Endosulfan-sulfate, 100 µg/ml, Ethyl acetate, 5m

Silica (SiO2), 1000µg/ml in Water/0.5% NaOH, 100ml

2,3-Dimethyl-5-(4-methylpentyl)naphthalene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 204256-07-5

12.880 µS/cm conductivity solution (box of 25x20mL sachet)