EPA Method 8325 Surrogate Standard Back Catalog number: 82483 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 55213 Medical Marijuana Heavy Metals Price on request 679817 Sulfamethoxypyridazine, 100 µg/ml, Methanol, 1ml Price on request 72595 Phenthoate Price on request