EPA Method 8260B Purgeable Internal Standard Back Catalog number: 28013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 19049 EPA Method 507 Surrogate Standard Price on request 3428.12-100-AN Isofenphos-des-N-isopropyl Price on request 59760 Parent for (Anions Mix #1) Price on request