EPA Method 418.1 - TPH IR Standard Back Catalog number: 98245 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679847 Triphenyl phosphite, 100 µg/ml, Methanol, 1ml Price on request 677693 13C6-Sulfapyridine, 10mg Price on request H952405-5MG trans-Hydroxy Praziquantel, 5mg Price on request