Calibration Standard Kit Back Catalog number: 52090 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 688359 Acid Mix, 100µg/ml in Water, 1ml Price on request 11854.12-K-ME Bis(p-chlorophenyl) sulfone,1000 µg/mL ,MeOH,1mL, Price on request 679445 Dieldrin, 100 µg/ml, Methanol, 1ml Price on request