Certified reference materials (CRMs) ensure accuracy and reliability in analytical workflows–but only if they are accurate and reliable themselves. A certificate of analysis (CoA) affirms the integrity of CRMs to reinforce the unbroken chain of traceability.
A CoA for CRMs provides comprehensive details about the material’s composition, purity, and traceability. It lists certified values for specific analytes, outlines measurement uncertainties, describes the analytical methods employed, and ensures traceability to national or international standards. By verifying that the CRM meets rigorous quality criteria, the CoA supports reliable calibration, method validation, and quality control in analytical laboratories. This document is key to ensuring the accuracy and dependability of results derived from the CRM.
Documentation and Traceability
A CoA provides full documentation that includes the origin, composition, and calibration of the CRMs. It is considered fundamentally important for delivering traceability according to the requirements for compliance, quality assurance, and the reproducibility of results. Traceability means that measurements performed with CRMs can be related back to a standard reference. This is usually through an unbroken chain of comparisons.
Traceability is very important for regulated industries. It delivers a base for assuring compliance with legal and regulatory standards. The CoA is a record that assures the verification of each step in the production process for the CRM. It also confirms the methodologies and standards used to produce the material. This type of transparency guarantees that the CRM is reliable and can provide repeatable and reproducible results, therefore underpinning the authenticity of scientific information and industrial processes.
Quality Assurance
The CoA discloses full details of the properties of the CRM concerned, certified values, and uncertainties associated with them. This guarantees that the necessary accuracy and reliability levels are complied with so CRMs are suitable for scientific and industrial applications. Such CRM capabilities and limitations stated in a CoA help users to feel confident in their measurements.
Quality assurance is further supported by the application of statistical analyses and included validation data within the CoA. This demonstrates that CRMs have been made and tested under controlled conditions. These parameters in the CoA enable a user to judge if a CRM is fit for a specific use or application.
Metrological Traceability
A CoA specifies the measurand(s) and the measurement scale. The traceability of this value is considered to be indispensable for the proper value assignment of CRMs. It is guaranteed by the fact that measurement results can be traced back to the International System of Units (SI) through a documented unbroken chain of comparisons.
Another key function of a CoA is to ensure a user's confidence in the accuracy of their measurements. Through using CRMs, a link can be made between the material's properties to an international standard. Traceability is a hallmark of quality for CRMs and a requirement for compliance with international standards. It thus ensures the CRM can be safely used in a wide range of labs across the world. This can support international collaboration and industry research and development.
Conformance to ISO Standards
The documentation of a CoA follows the principles given in ISO Guide 31. It ensures that CRMs are made to the highest levels of quality and offer international regulatory compliance, inclusive of ISO 17034 and ISO 17025. Such adherence to standards gives an added level of credence and reliability. This is a must for all users who want to portray adherence to stringent regulatory standards. Furthermore, the ISO framework ensures consistency and reliability in the production and use of CRMs among different producers. As a result, material comparison and interchangeability can be achieved without loss in quality, something which is integral to an international application of scientific investigation and industrial processes.
Intended Use and Handling Instructions
The CoA includes how the CRM should be used, along with information for its storage and handling. It ensures that materials are utilized for the purpose that they were purchased for. Handling instructions avoid common pitfalls that could easily compromise the CRM, such as exposure to incompatible substances or conditions. The CoA thereby defines the scope of use and offers the best practices to maintain CRMs for users to get maximum value from their materials. This can ensure the CRM maintains its value over its lifetime.
Managing Product Quality Through Custom CRMs and their CoAs
Using a CRM, and its CoA, is an excellent method of establishing quality control and ensuring products, scientific instruments, and tests can be verified as reliable and fulfill regulatory and industry standards. A CoA is useful in many ways for CRMs, from being applied as a product's identification document, to demonstrating the product complies with specifications. Therefore, they are valuable for product manufacturers, helping them confirm the reliability of methods applied to product tests and deliver product consistency.
Inorganic Ventures will help you choose a CRM to confirm the quality of your tests and equipment. Not only do we have readily available CRMs, but we also have custom CRMs, each accompanied by a CoA. Visit our website to learn more about these CRMs and how they could be applied to your work.