Single Element Standards for ICP-OES (Inductively Coupled Plasma – Optical Emission Spectrometry) The solutions and mixtures are made using materials of the highest purity, and therefore meet the requirements for instrumental analysis by AAS and ICP. All solutions are certified and can be traced to NIST standard reference solutions (excluded: iridium, osmium and ruthenium). Solutions are produced according to ISO 17034 in an accredited environment. The solutions are tested in a laboratory accredited to ISO/IEC 17025 and supplied with a detailed, batch-specific certificate of analysis. Each standard solution is made of high purity starting materials (mostly ≥99,999 %), and its content is determined gravimetrically and by ICP. High quality acids (purified by subboiling distillation) and water are used for production of the solutions. This gives you first-class reference materials of the highest purity and quality. Up to 70 measured trace impurities in the ppt range 24 months shelf life for unopened bottle & 12 months after the bottle has been opened In single-element solutions, the standard deviation is a maximum of 1% for concentrations greater than 10 mg/l and a maximum of 3% for concentrations less than 10 mg/l of the specified value. Ytterbium ICP Standard Solution ROTI ® Star 10 000 mg/l Yb, in 5 % HNO 3