Method 200.8/1638/1640 Internal Standard

4-Phenyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 104601-39-0

Arochlor 1016 , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-10, Cas.no. 12674-11-2

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Light White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)