Appendix II Semi-Volatile Mix

Mass-Labelled Chlorinated Biphenylol Solution/Mixture, 1.2ml, toluene

Metoprolol-d7 hydrochloride (isopropyl-d7), neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1219798-61-4

(2RS)-2-(4-n-Propylphenyl)propanoic acid, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 3585-47-5