EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93869 Sucrose Price on request 1980.17-10-IO 2-(4-Nonylphenoxy)acetic acid isomer mixture,10 µg/mL,isooctane,1mL, Price on request 676944 2,4,6-Trichloroaniline, 250mg Price on request