Assurance grade standards
SPEX CertiPrep Inc., of Metuchen, N.J., offers Assurance Grade Single Element Standards available in 100 mL, 500 mL and 250 ml bottles. The company offers standards for AA and ICP in 250 ml bottles. This is in addition to the 100 mL and 500 ml varieties already available. Customized standards are also available in this wide variety of sizes. The standards now include Speciation Standards and an expanded line of Quality Control Standards.