Heptachlor-endo-epoxide (trans-), 100µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 1024-57-3

11H-Benzo[b]fluorene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 243-17-4

Diethylene glycol mono(4-n-nonylphenyl) ether-13C6, 10µg/ml, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 1346602-11-6

6.44 ppt TDS solution (box of 25x20mL sachet)