EPA Method 8121 Analytes Back Catalog number: 81202 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10323.5-1MG N-Nitroso-D,L-proline-d7 Price on request 71398 Tribromoacetic acid Price on request S-4200-ASS-CY Calibration Standard THC 20 Analytes, each concentration as listed in cyclohexane; unit : 6x1mL The working standard concentrations are: o-Terphenyl (ITSD) 200 µg/mL 5a-Androstane (ITSD) Price on request