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ISO Quality Credentials


Restek’s reference standard manufacturing and QC testing laboratories in Bellefonte, PA, feature ISO 17034 and ISO/IEC 17025 accreditations. Issued by the American Association for Laboratory Accreditation (A2LA), these accreditations—as well as ISO 9001 registration, which has been maintained since 1994—serve as recognition that Restek and its labs meet the world-class quality standards established by the International Organization for Standardization (ISO).

Whether or not you are required to use certified reference materials (CRMs) from an accredited lab, you can source your primary- and secondary-source reference standards from Restek and benefit from the exceptional product quality and customer service needed to meet strict ISO guidelines. In addition to an extensive selection that is in stock and ready to ship, Restek’s custom-formulated solutions also fall under our ISO accreditations. Satisfy all of your certified reference material needs—as well as order GC and LC columns, sample preparation supplies, and accessories—using one reliable supplier!

Learn more about Restek’s ISO credentials below and view the certificates (including scopes of accreditation). If you have any questions, please call 1-800-356-1688, ext. 3. Visit to learn more about Restek's line of reference standards.

ISO 9001:2015

ISO 9001 is an internationally recognized standard for general quality management that prescribes systematic controls to ensure products and services consistently fulfill consumers’ needs and expectations. To meet ISO 9001 guidelines, companies must implement standard written procedures (SOPs) and produce full traceable documentation for products beginning at the time of manufacture straight through to distribution. Restek has further applied the ISO 9001 standard by creating systems for customer feedback and customer service as well as for the capture of corrective and preventative actions.

View Restek’s Certificate of Registration to ISO 9001:2015.

ISO/IEC 17025:2017

ISO/IEC 17025 applies broadly to any testing or calibration laboratory. To gain and maintain accreditation, Restek’s reference standards lab must demonstrate that its analytical testing procedures provide consistent, valid results and ensure the highest possible quality—from raw material purity to final product. It is also required to have systems in place for the continuous improvement of testing procedures based on both customer and employee feedback. Restek has proven its technical competence and attained accreditation to ISO/IEC 17025 by repeatedly and reliably generating exceptional test results.

View Restek’s Scope of Accreditation for ISO/IEC 17025:2017.

ISO 17034:2016

ISO 17034 specifically covers reference standard producers, dealing not only with the quality systems used during manufacturing, but also with the determination of uncertainty levels associated with all values reported on a standard’s certificate. Restek conducted extensive studies on gravimetric, homogeneity between-ampul, storage stability, and shipping stability uncertainties. In addition, for all reference standards it produces, Restek’s lab reports a combined uncertainty that covers manufacturing, testing, storage, and shipping—allowing accreditation to cover both stock and custom-formulated solutions. Restek has proven its commitment to offering customers superior-quality certified reference materials by seeking and obtaining the ISO 17034 accreditation—which, when combined with registration to ISO 9001 and ISO/IEC 17025 accreditation, symbolizes the highest level of achievement possible for a reference standard provider.

View Restek’s Scope of Accreditation for ISO 17034:2016.

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