HPS welcomes requests for single and multielement standards. Our chemists have extensive experience in developing standards and will work with you to design the optimum product. Custom products include a certificate of analysis that includes NIST traceability, where possible. Pricing for 100 or smaller, 250, 500, and 1000 mL or larger solutions are available upon request. A variety of packaging options are available to accommodate your special needs. In addition to aqueous solutions, custom standards can be prepared in a variety of oils and organic solvents as well as on filter media. High-Purity Standards offers custom organic solutions for use with GC, GC-MS, HPLC, and Karl Fischer applications.