Total Kjeldahl Nitrogen as N Back Catalog number: 50465 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 63141 2,2',3,4,5,5'-Hexachlorobiphenyl Price on request 2601.16-10MG 1,2,3,6,7,8-Hexahydropyrene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1732-13-4 Price on request 96166 PAH Standard (10 ppm), 10µg/ml in Acetonitrile, 1ml Price on request