This certified reference material (CRM) is produced in accordance with ISO 17034 and characterized in accordance with ISO/IEC 17025. This CRM is traceable to SI unit kg and measured against primary material from a National Metrology Institute (NMI), e.g. NIST.

Potassium ICP standard is a suitable calibration standard for elemental analysis by Inductively Coupled Plasma (ICP)technique.

1 g/L K in 2% nitric acid, prepared with high purity KNO3, HNO3 and water.