Anions Calibration Mix Back Catalog number: 59107 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681916 Prallethrin, 100 µg/ml, Acetonitrile, 5ml Price on request 12698.40-100-ME Bisoprolol hemifumarate, 100µg/ml in MeOH, 1ml Price on request 681669 Benzo[k]fluoranthene, 10.0 µg/ml, Acetonitrile, Price on request