2,2',5,5'-Tetrabromo[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

n-Butyl acetate, 1000µg/ml in MeOH, 1ml

Retrorcine, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 480-54-6

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy 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)