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The Longueuil Laboratory

The Longueuil Laboratory is located on lands where, long before colonization, different indigenous peoples lived and interacted. This includes the Kanien'kehá꞉ka (Mohawk) and the Haudenosaunee People.

About the Canadian Food Inspection Agency

The Canadian Food Inspection Agency (CFIA) is a science-based regulator with a mandate to safeguard the food supply, protect the health of plants and animals, and support market access. The Agency relies on high-quality, timely and relevant science as the basis of its program design and regulatory decision-making. Scientific activities inform the Agency's understanding of risks, provide evidence for developing mitigation measures, and confirm the effectiveness of these measures.

CFIA scientific activities include laboratory testing, research, surveillance, test method development, risk assessments and expert scientific advice. Agency scientists maintain strong partnerships with universities, industry, and federal, provincial and international counterparts to effectively carry out the CFIA's mandate.

Photograph - Longueuil Laboratory building

The Longueuil Laboratory has analytical expertise in several areas related to food safety and consumer protection. The laboratory is the national reference and research centre for food allergens. It is the only CFIA laboratory with expertise in nutritional analysis to verify compliance of nutrition information in accordance with Canada's food labelling regulations. The laboratory also works in the fields of nutritional composition, food colours and marine toxins.

What we do

Diagnostic testing

  • Food allergens: analysis of imported and domestic food, including consumer complaint samples using enzyme-linked immuno-sorbent assays (ELISA)
  • Colours in food: analysis of regulated food colours, illegal dyes and natural colours in foods by high-performance liquid chromatography
  • Nutritional labelling: verification of the nutrients, vitamins, minerals, lipids, carbohydrates and protein content declared in the nutrition facts table
  • Food composition of dairy products: analysis of moisture, fat and other parameters by instrumental and classic chemistry methods
  • Marine toxins: using high-performance liquid chromatography to detect amnesic (domoic acid), paralytic (PSP) and diarrhetic (DSP) shellfish toxins

Research and development

  • Development and implementation of new chemistry methods to fulfill the laboratory's analytical mandate.
  • Evaluation, development and validation of analytical methods (ELISA, PCR, mass spectrometry) to detect allergens in processed food.

Scientific advice

  • Scientific advice to operational and inspection staff at the CFIA, and sharing technical expertise with private labs, regulated parties and other stakeholders.
  • Quality audits of private food laboratories for the ISO/IEC/ 17025 standard.

Quality management

All CFIA laboratories are accredited in accordance with the International Standard ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories. The Standards Council of Canada (SCC) provides accreditation for routine testing, test method development and non-routine testing, as identified on the laboratory's Scope of Accreditation on the SCC website. Accreditation formally verifies the CFIA's competence to produce accurate and reliable results. The results are supported by the development, validation and implementation of scientific methods, conducted by highly qualified personnel, using reliable products, services, and equipment, in a quality controlled environment. Participation in international proficiency testing programs further demonstrates that our testing is comparable to laboratories across Canada and around the world.

Physical address

Longueuil Laboratory
1001 St-Laurent Street West
Longueuil, QC
J4K 1C7

More information

Learn about other CFIA laboratories.