Method 8270A Back Catalog number: 82700 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678241 4-Epichlortetracycline hydrochloride, 5mg Price on request 677122 Methoxychlor, 10.0 µg/ml, Isooctane, 10ml Price on request M373550 Mitragynine, 1mg Price on request