Mass-Labelled PFCAs and PFSAs Mix, 2µg/ml in MeOH, 1,2ml

Low level Nitrogen Calibration Units: 1x1mL ampoules or 10mL screwcapped bottle Nitrogen introduced using Aniline Catalogue No. Concentration Matrix: isooctane mg/kg (ppm) S-4142-0 Blank S-4142-05 0.5 S-4142-1

1H,1H-Perfluoro-3,5,5-trimethylhexanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 238403-51-5

4,4’-DDT