Cefazolin sodium salt, certified, 0.1g

Phenol, 1000µg/ml in MeOH, 1ml

Perfluorooctane sulfonic acid potassium salt, 100mg

ISO 9377-2MOD Standard Mixture 1 of n-Alkanes and BTEX S-4423-50-5PE C7+C10+ C20+C40+BTEX in n-Pentane Determination of Hydrocarbon Oil in Water Index 10 Analytes; each 50µg/mL in n-pentane; units: 1x1mL, 1x5mL, 10x1mL Benzene B