Metformin-d6-HCl, 100μg/ml in MeOH, 5ml

4,4'-DDT, 10.0 µg/ml, Ethyl acetate, 10ml

Oxalic Acid (C2H2O4)

ISO 9377-2 Standard Mixture of n-Alkanes C20-C40 (all even) Determination of Hydrocarbon Oil in Water Index 11 Analytes, each 50µg/mL in n-Pentane, units: 1x1mL, 1x5mL, 10x1mL This standard is also available as 50µg/mL in n-hexane; units 1x1mL, 1x5