EPA Method 418.1 - TPH IR Standard Back Catalog number: 98245 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674877 Kanamycin monosulfate, 100mg Price on request 10371.8-K-ME Valproic acid-d6 Price on request 71244 Methyl paraoxon, 1000µg/ml in MeOH, 1ml Price on request