Internal Standard - Surrogate Mix

Native Perfluoroether-Carboxylic Acids and -Sulfonate Mix, 2µg/ml in MeOH, 1,2ml

(±)-Betaxolol-d7 hydrochloride (N-iso-propyl-d7)

iso-Butyl 4-hydroxybenzoate-2,3,5,6-d4, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1219805-33-0