Potassium (K) Back Catalog number: 56719 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 58073 Tantalum (Ta) Price on request 30001 EPA Method 502.2/524.2 - Liquids, VOC, 200ug/ml in MeOH, 1ml Price on request MBDE-MXC Mass-Labelled PBDE Solution/Mixture, 1.2ml, nonane Price on request