624B Internal / Surrogate Standard

1,2,4-Trihydroxy-9,10-anthraquinone, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 81-54-9

Dibenzothiophene in Xylene Units: 5x1mL ampoule, 1x10mL screw cap bottle Chiron No. (Matrix) Concentration Isooctane Xylene White oil 3 cst µgS/g (ppm) Wt.% S-4055-0-IO S-4054-0-XY S

Pyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no.