EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59961 Arsenic (As) and Antimony (Sb) Price on request 71623 1-Octene Price on request 674765 2-Chloro-4-methylsulfonylbenzoic acid, 100mg Price on request