EPA Method 508 - Performance Check Solution Back Catalog number: 19132 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59077 Fluoride (F-) Price on request 678399 Endrin, 100 µg/ml, Acetonitrile, 5ml Price on request 679982 (-)-Nicotine, 100 µg/ml, Methanol, 1ml Price on request