MRH/HRH surrogate spiking, Kansas method

d4 C27 alpha alpha alpha (20R)-Cholestane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-10, Cas.no. 205529-74-4

EPA 528 rev. 1.0 Internal Standard Solution 2 200µg/mL in dichloromethane; unit: 1x5mL 2081.6 2,3,4,5-Tetrachlorophenol [4901-51-3]

EPA Method 548.1 Internal Standard