Frequently Asked Questions

Reference Materials

Can my gas standard be re-certified?

Re-certification is available for gas standards. Gas standards can be expensive, and tend to be stored for months, if not years, in the lab, so it is wise to have the composition re-certified by a qualified vendor. For gas standards purchased from Restek, request re-certification directly from Spectra Gases, Inc. (800-932-0624), Scott Specialty Gases (800-331-4953), or Matheson Tri-Gas (800424-9300). For gas standards purchased from vendors other than Restek, it is necessary to contact the vendor who manufactured the mixture.