The certified reference standards for ICP-OES guarantee ease of use and precise and reliable analytical results. Wide range of single-element and multi-element standards designed for the specific needs of different applications. Equivalent standards from leading manufacturers are also available: Agilent, Perkin Elmer, Thermo, Shimadzu, Merck. The manufacturers' quality system is ISO 9001 certified and ISO 17034 and ISO / IEC 17025 accredited.