EPA Method 531.1 Individual Analytes Back Catalog number: 31241 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11668.12-100-IO 3,4-Dichlorobiphenyl ,100 µg/mL,isooctane,1mL Price on request 677759 DL-alpha-Tocopherol, 1000 µg/ml, Methanol, 1ml Price on request 53032 Calibration Standard Set Price on request