Calibration Standard Mix 4 Back Catalog number: 52013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678427 Heptachlor-exo-epoxide, 100 µg/ml, Acetonitrile, Price on request 79052 2,4’-DDT, 1000µg/ml in Hexane, 1ml Price on request 80153 EPA Method 8015B - Extraction Analytes Price on request