Unknown Contaminant Identification
Identify particles, residues, fibers, films, deposits, and other unknown materials using orthogonal analytical evidence.
Overview of Extractables and Leachables Support Services
Extractables and leachables work is most useful when the test plan reflects the actual contact material, route of exposure, product matrix, storage condition, processing contact, and decision risk. Triclinic supports E&L-related investigations where targeted chemistry, contaminant identification, packaging comparison, surface residue analysis, polymer identification, or impurity follow-up is needed to understand a suspected source.
This page is not a generic promise that one test solves every E&L program. Good E&L support may require controlled extraction design, method selection, reference materials, mass-spectral interpretation, polymer and additive knowledge, and follow-up confirmation or quantitation.
- A container closure, device component, tubing, liner, seal, adhesive, label, gasket, single-use system, processing material, or packaging component is a suspected source.
- A peak, residue, odor, film, particulate, discoloration, or unknown component may be related to material contact.
- The team needs investigative support to connect a leachable-like or extractable-like finding to a plausible source.
Packaging, Contact-Material, and Leachable-Like Source Investigation Example
Extractables and leachables support often turns on source attribution: whether a signal, residue, odor, film, discoloration, particle, or unexpected peak is consistent with packaging, label adhesive, ink, cap liner, induction seal, filter, tubing, gasket, cleaning residue, or another contact material. Comparative analysis is therefore as important as detection.
The counterfeit-identification and cellulosic-fiber examples provide useful E&L analogs. FTIR/NIR and Raman can compare polymers, adhesives, labels, seals, residues, and dosage-form components. SEM/EDX can localize inorganic fillers, pigments, metals, or mineral material. IR plus SEM can distinguish cellulosic fibers that might otherwise look chemically similar and tie a finding to a wipe, paper, packaging, or filter-source hypothesis.
What to provide for scoping
- Product matrix, route, dosage form, and whether the issue is exploratory, investigational, or cGMP-related.
- Candidate materials such as container closure components, liners, seals, adhesives, labels, tubing, gaskets, filters, process-contact materials, or packaging lots.
- Any chromatograms, spectra, complaint photographs, storage history, extraction conditions, or stability observations already available.
- The decision needed: source identification, material comparison, targeted confirmation, risk triage, or method development.
Analytical capabilities commonly used for this work
| Technique or platform | Information produced | Why it matters |
|---|---|---|
| Optical and digital microscopy | Visual morphology, dimensions, surface features, color, layering, and sample-selection context. | Documents the evidence before destructive testing and helps select specific particles or regions for analysis. |
| Raman microscopy and chemical mapping | Molecular fingerprints and spatial distribution of many APIs, excipients, pigments, polymers, and crystalline components. | Useful for suspect-versus-authentic comparisons, coating/core analysis, layered systems, and localized unknowns. |
| FTIR and IR microspectroscopy | Polymer, organic, excipient, adhesive, fiber, film, and residue identification. | Often strong for particles, fibers, packaging materials, cap liners, label adhesives, and contact-material comparisons. |
| SEM/EDX | High-resolution morphology plus elemental composition and elemental maps. | Critical for inorganic particles, fillers, talc-related signals, metals, corrosion, pigments, and source comparisons. |
| LC/MS, GC/MS, chromatography, NMR, or ICP-MS | Targeted or investigative molecular, volatile/semi-volatile, structural, or trace-element information. | Added when direct microanalysis is not enough or when confirmation, quantitation, or structural assignment is required. |
Related contaminant and impurity services
Root Cause Investigations
Compare good and suspect lots, process materials, packaging, and suspected sources to support deviation and CAPA decisions.
Trace Level Analysis
Use sensitive and spatially resolved workflows for low-level components, particles, residues, and elemental signals.
Counterfeit Analysis
Compare suspect products, packaging, labels, seals, and dosage forms against authentic references.
Frequently Asked Questions about Extractables and Leachables Support
Can Triclinic compare the unknown to suspected sources?
Yes. Comparisons to retained lots, authentic lots, raw materials, packaging, process-contact materials, filters, cleaning agents, environmental samples, or supplier materials often make the interpretation stronger.
Can the result support a quality or manufacturing investigation?
Yes, when the samples, chain of custody, controls, and comparison materials are appropriate for the decision. The report should separate confirmed findings from plausible but unconfirmed source hypotheses.
What if the sample is very small or mixed?
Very small or mixed materials may require microscopy-guided sampling, multiple techniques, and careful language. Some results can be definitive; others are best reported as material class, component assignment, or evidence-consistent source comparison.
How should an E&L investigation be scoped?
Start with the contact material, product or process conditions, duration, temperature, surface-area relationship, known formulation components, toxicological thresholds, prior data, and the regulatory or quality decision. Screening, targeted, simulation, and leachables studies should not be treated as interchangeable.
Talk to a Triclinic Labs scientist
Send the material, current data, project objective, quality requirements, suspected sources, available comparison materials, and timeline. Triclinic will route the request to the right scientific or operational contact.