EPA Method 1657 Analytes Back Catalog number: 31784 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0358.6-10MG 2,4-Dimethylthiophene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 638-00-6 Price on request C242495 Cefazolin, 2,5g Price on request PCN-CVS-A PAH-CVS-A Calibration Kit, 5 x 200uL, nonane Price on request