Reference Material Certification: A Canadian Lab Guide

7OHyea
Jul 17
7 min read

Lab technician examining certified reference material vial

What is reference material certification, and what makes a CRM valid?

Reference material certification is the formal process of establishing the certified property value of a candidate certified reference material. The outcome is a certificate that documents three non-negotiable components: the certified value, its associated measurement uncertainty, and a statement of metrological traceability. Remove any one of those three, and the material is no longer a CRM. It reverts to a reference material (RM), which serves a different and more limited purpose.

The distinction between an RM and a CRM is not about quality. It is about the level of characterization and metrological rigor. An RM is sufficiently homogeneous and stable for its intended use, but it lacks the documented uncertainty and traceability chain that qualifies as a CRM under ISO Guide 30:2015. Only a CRM can establish metrological traceability in a laboratory measurement process, which is the standard ISO/IEC 17025 requires.

Certification is a first-party attestation, meaning the reference material producer bears full responsibility. Standards governing this process include ISO 17034, which sets competence requirements for producers, and ISO Guide 31, which specifies what a valid certificate must contain. ISO 33401:2024 provides updated guidance on certificate contents, labels, and accompanying documentation.

Key components of a valid CRM certificate:

Certified property value (quantitative or qualitative)
Associated measurement uncertainty at a stated confidence level
Statement of metrological traceability to the International System of Units (SI)
Intended purpose and instructions for proper use
Technical method details used during characterization
Producer name, contact information, and period of validity

Which Canadian programs and authorities certify reference materials?

Canada has a well-established infrastructure for producing and certifying reference materials, anchored by two primary institutions and supported by federal regulatory bodies.

The Canadian Certified Reference Materials Program (CCRMP), administered through Natural Resources Canada, produces standardized geological and mineral reference materials used by analytical laboratories domestically and internationally. Its materials support mineral analysis, geochemical surveys, and mining industry quality control. The CCRMP is one of the longest-running national CRM programs in the world and remains a trusted source for matrix-matched geological standards.

The National Research Council Canada (NRC) operates a separate and broader CRM program covering chemical, biological, and physical reference materials. NRC-certified materials carry documented traceability to SI and are produced under ISO 17034 accreditation, with scope details that specify the types and ranges of materials authorized. Environment and Climate Change Canada (ECCC) also holds ISO accreditations relevant to environmental reference materials, particularly for water quality and atmospheric monitoring applications.

Key Canadian authorities and certification programs:

CCRMP (Natural Resources Canada): Geological and mineral matrix CRMs for global lab use
National Research Council Canada (NRC): Broad-scope CRM production under ISO 17034 accreditation
Environment and Climate Change Canada (ECCC): Environmental monitoring reference materials with ISO accreditation
Standards Council of Canada (SCC): Oversees accreditation bodies operating within Canada, including those assessing ISO 17034 compliance

How do Canadian labs actually use certified reference materials?

CRMs serve four core functions in analytical laboratories: instrument calibration, method validation, precision and trueness assessment, and establishing metrological traceability. Each function is distinct, and selecting the wrong material type for the wrong function creates measurement errors that can cascade through an entire dataset.

Hands calibrating lab instrument with certified reference material

ISO/IEC 17025 accreditation requires laboratories to demonstrate metrological traceability for all reported results. CRMs are the primary mechanism for meeting that requirement. When a lab measures a liquid sample and reports a component’s identity to a client, a CRM must be run alongside the sample to anchor the result to a recognized reference system. Without that anchor, the traceability chain breaks.

Different CRM types serve different analytical purposes. Single-component, multi-component, and matrix CRMs each address specific measurement scenarios depending on the technique and the required traceability level. Matrix CRMs, for instance, are particularly valuable in food safety and environmental monitoring because they replicate the complexity of real samples, including potential interferences.

Major CRM applications in analytical laboratories:

Calibrating instruments such as mass spectrometers, ICP-OES systems, and chromatographs
Validating new analytical methods before routine use
Running as blind check samples to monitor ongoing measurement precision
Establishing traceability chains required by ISO/IEC 17025 and regulatory bodies
Supporting proficiency testing and interlaboratory comparison programs
Verifying trueness in food safety, environmental, and clinical analyses

Best practices for using and handling certified reference materials correctly

The most common and costly mistake in CRM usage is treating a product information sheet as a certificate. A product information sheet does not contain a certified value, measurement uncertainty, or traceability statement. Using it as though it does invalidates your traceability claim entirely and puts ISO/IEC 17025 compliance at risk.

Before any CRM enters your workflow, verify that the certificate is current. Stability limits evolve as measurement science advances, and updated Reference Material Information Sheets often supersede older certificates. NIST and national metrology bodies recommend checking the supplier’s latest product database before each use cycle, not just at initial procurement.

Storage and handling are equally critical. CRMs must be stored under the conditions specified on the certificate, whether that means refrigeration, desiccation, or light protection. Opening a vial and exposing the material to ambient conditions beyond the certificate’s guidance can compromise homogeneity and stability, rendering the certified values unreliable.

Procedural checklist for effective CRM usage:

Confirm the certificate contains all three required elements: certified value, uncertainty, and traceability statement
Check the producer’s current ISO 17034 accreditation scope before procurement
Match the CRM’s certified intended use to your specific analytical method
Store under certificate-specified conditions and log handling events
Do not use a CRM outside its stated concentration range or matrix type
Replace expired or stability-exceeded materials promptly

Pro Tip: When evaluating a new supplier, request the producer’s accreditation certificate and scope document, not just the product certificate. The scope tells you exactly which material types and property ranges the accreditation covers, and a mismatch between scope and the material you are buying is a red flag.

How the CRM certification process actually works

Producing a certified reference material is a structured, multi-stage process governed by ISO 17034. It begins with candidate material selection and homogeneity testing, which confirms that the property of interest is uniformly distributed throughout the batch. Homogeneity is assessed statistically across multiple units drawn from the lot, and any material failing homogeneity criteria cannot proceed to certification.

Infographic showing CRM certification process steps

Stability testing follows, conducted under both long-term storage conditions and accelerated stress conditions. The goal is to establish that the certified value remains valid throughout the stated shelf life. Characterization, the core of the certification process, uses one or more metrologically valid measurement methods to assign the property value. Credible producers often apply multiple independent methods or engage multiple qualified laboratories to reduce systematic bias.

Uncertainty budgeting pulls all sources of variability together: within-batch homogeneity, between-batch variation, stability contributions, and characterization method uncertainty. The final expanded uncertainty on the certificate reflects this full budget, typically reported at approximately 95% confidence. Certification responsibility rests entirely with the producer as a first-party attestation, though credible producers may supplement their own data with peer-reviewed validation and technical reports.

How to select the right CRM for your analytical application

Selecting a CRM is not simply a matter of finding a material with the right analyte. The matrix must match your sample type as closely as possible, because matrix effects can shift measured values even when the analyte concentration is identical. A water-based CRM used to validate a soil extraction method will not capture the interferences present in the actual sample.

Concentration range is the second critical criterion. The certified value should fall within the working range of your method, ideally near the midpoint. Using a CRM at the extreme edges of your calibration range amplifies uncertainty and reduces the diagnostic value of the check. Beyond matrix and concentration, fitness for purpose requires that the CRM’s measurement uncertainty be smaller than your method’s acceptable uncertainty. If the CRM’s uncertainty is comparable to or larger than your method tolerance, it cannot serve as a meaningful traceability anchor.

Finally, verify the producer’s track record. Materials that have been used in interlaboratory comparisons, cross-checked by multiple methods, or referenced in peer-reviewed literature carry a higher level of demonstrated reliability than newly released materials with limited use history.

CRM use in Canadian laboratory contexts

Canadian environmental monitoring laboratories routinely use NRC-certified water quality CRMs to validate methods for trace metal analysis in drinking water and wastewater. These matrix CRMs replicate the ionic complexity of natural water samples, allowing labs to detect method bias before it affects reported results submitted to provincial regulators.

In the mining sector, CCRMP geological CRMs are embedded into quality control protocols at assay laboratories across British Columbia, Ontario, and Quebec. A typical protocol inserts a CCRMP standard at defined intervals within each analytical batch, creating a continuous record of method performance that satisfies both internal quality systems and third-party audit requirements.

Food testing laboratories in Canada use multi-component CRMs for pesticide residue and heavy metal analyses, where regulatory limits under the Canadian Food Inspection Agency (CFIA) demand defensible, traceable results. Researchers working with alkaloid compounds, including those studying mitragynine alkaloids, rely on laboratory detection methods that depend on well-characterized reference standards to produce results that hold up to scientific scrutiny.

Supporting your research with analytically verified materials

For laboratories requiring research-grade alkaloid reference materials in Canada, 7ohyea supplies 93% pure 7OH powder and a range of precisely formulated 7-hydroxymitragynine tablets at 15mg, 30mg, and 50mg dosages, all sourced and manufactured in British Columbia. These materials are designed for analytical and research use only, not for human consumption, and are available with documented purity specifications to support your laboratory’s quality assurance workflows.

Key Takeaways

Certified reference material certification requires all three elements, certified value, measurement uncertainty, and metrological traceability, to be present on the certificate or the material does not qualify as a CRM.

Point	Details
Three required certificate elements	A valid CRM certificate must state the certified value, measurement uncertainty, and metrological traceability to SI.
Canada’s primary CRM programs	CCRMP (Natural Resources Canada) and NRC are the leading Canadian producers operating under ISO 17034 accreditation.
CRM vs. RM distinction	Only CRMs establish metrological traceability; RMs serve calibration and precision checks but cannot anchor a traceability chain.
Matrix and concentration matching	Select CRMs whose matrix type and certified value concentration align with your method’s actual working range.
Certificate currency matters	Always verify that the certificate in use is current; updated Reference Material Information Sheets may supersede older versions.