Sodium perfluoro-1-tridecanesulfonate, 50µg/ml MeOH

4.4'-DDE (13C12), 100µg/ml in n-Nonane, 1,2ml

7-Phenylheptanoic acid, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 40228-90-8

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)