EPA Method 8240A Internal Standard Back Catalog number: 22003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676687 Feruloylputrescine, 10mg Price on request 11141.18-50-T syn Dechlorane Plus ,50 µg/mL,toluene,1mL, Price on request 82515 EPA Method 8250 - Acid Matrix Spiking Solution Price on request