Citric acid [3% wt]

2,2',4,5'-Tetrachlorobiphenyl, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 41464-40-8

PAH-Mix 31 deuterated, 1000 ng/µl, 1ml

Bisphenol F-d10, 1mg