Calibration Standard 1 Back Catalog number: 52021 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11748.12-100-IO 2,2',3,5,6,6'-Hexachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 79307 Chlorothalonil Price on request XA20950009AL PAH-Mix 9, 100 ng/µl, 1ml Price on request