ISO 17025 Laboratory: cleaning residue analysis

For medical device manufacturers, cleaning validation is a critical compliance issue, a process performance issue, and a patient risk control issue. The presence of organic, inorganic, detergent, or particulate residues can call into question the effectiveness of the cleaning process, batch release, or the robustness of the technical file. An expert laboratory supports your teams in characterizing residual contaminants, defining the appropriate testing strategy, and producing actionable results within the framework of ISO 19227. This approach naturally fits into a broader process of medical device cleaning process validation and analytical justification of acceptance thresholds.

analysis can cover several families of residual contaminants: organic residues such as hydrocarbons and total organic carbon, inorganic residues such as heavy metals, mineral acids, or compounds originating from detergents, as well as visible or subvisible particulate contaminants. This analytical coverage makes it possible to assess the actual cleanliness of the device after cleaning, rinsing, or chemical treatment, including on complex geometries or sensitive materials.

Cleaning residue analysis is primarily carried out within the framework of ISO 19227 for medical devices. Depending on the nature of the contaminants and the testing strategy, other standards may also be used, including ISO 10993-12 for extractions, ISO 10993-18 for extractables, ASTM G 136-03 for certain inorganic residues, as well as USP 788 and the European Pharmacopoeia 2.9.19 for particle counting. This combination makes it possible to build a robust, documented analytical justification.

ISO 17025 accreditation provides a recognized framework for test control, technical competence, metrological traceability, and result reliability. For a medical device manufacturer, this secures the data used in process validation, quality investigations, and regulatory files. Using an accredited laboratory also limits uncertainties linked to analytical transfer and makes it easier to use the results during audits or document reviews.

The first ISO 17025 laboratory accredited by COFRAC for ISO 19227, the laboratory carries out cleaning residue analysis in-house for medical device manufacturers. Support covers the analysis of total hydrocarbon residues, measurement of total organic carbon, the search for inorganic contaminants, detergent residues, and particles according to the applicable standards. The laboratory can also provide R&D support, method development, and analytical validation in accordance with ICH Q2 (R2), in order to adapt the tests to the matrix, the device, and the process under study.

The laboratory relies on an in-house analytical platform of 5,200 m² to carry out tests without routine analytical subcontracting. Organic residues are analyzed in particular by GC-FID and TOC analyzer; inorganic contaminants by ICP-AES, ICP-MS, and ion chromatography; particles by optical microscopy according to the applicable standards. Depending on the needs, these investigations can be supplemented by GC-MS, ICP analysis for medical devices, or SEM to further identify contaminants.

When the matrix, geometry, or target thresholds require it, the laboratory develops specific methods and then validates them according to the applicable requirements, notably ICH Q2 (R2). This approach is particularly useful for innovative devices, very low contamination levels, or tailor-made extraction protocols. It can be combined with complementary services, for example for extractables studies or USP 467 analysis in a laboratory when the solvent issue needs to be investigated.

Beyond the test itself, the laboratory offers tailored support: definition of the analysis plan, choice of techniques, help with AET calculation, exhaustive extraction, result interpretation, and process optimization support. This approach is suited to cleaning, passivation, anodizing, chemical treatment, or surface characterization issues. Your teams thus have a single point of contact to turn a compliance need into directly actionable analytical data.

To start a study, you need to identify the device, the materials, the cleaning process, the agents used, the critical areas, and the compliance objectives. An expert laboratory can then propose a tailored testing strategy: define the sampling or extraction plan, select the relevant analytical techniques, carry out the measurements in-house, interpret the results, and formalize the conclusions useful for your validation. To move forward quickly with your project: define your needs, share your process constraints, assess analytical feasibility, plan the tests, and validate the control strategy.