EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675154 D8-Naphthalene, 10.0 µg/ml, Cyclohexane, 10ml Price on request LA11457534CY Chloroparaffin C12 55.00% Cl, 10μg/mL in CY, 1ml Price on request EN-1948STK PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request