Interference Standards Set Back Catalog number: 52038 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59968 Anions Mix #1 Price on request 680847 2-Carboxy-4-chlorophenoxyacetic acid, 10mg Price on request P998904 Pyruvic Acid-13C3 Sodium Salt, 5mg Price on request