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Pyro-GC-MS

What Is Pyro-GC-MS?

Pyrolysis GC-MS (Py-GC/MS) is a technique that thermally decomposes a sample and analyzes the resulting fragments by GC-MS. It is especially powerful for identifying polymers, resins, adhesives, rubbers, coatings, waxes, and complex organic residues that are difficult to dissolve or analyze by standard GC-MS or LC-MS. By converting solid or high-molecular-weight materials into characteristic pyrolysis products, Py-GC/MS delivers highly diagnostic “fingerprints” for material identification and comparative investigations.

We provide Py-GC/MS testing for material identification, contamination and residue investigations, supplier/lot comparisons, and failure/root-cause analysis, supporting R&D, QC troubleshooting, and reliability investigations.

What Pyro-GC-MS Is Used For

Py-GC/MS is commonly used to:

  • Identify unknown plastics, rubbers, resins, and coatings

  • Differentiate similar-looking materials (e.g., polymer blends, copolymers, adhesive systems)

  • Investigate black specks, gels, deposits, residues, and films

  • Evaluate additives and degradation markers (antioxidants, plasticizers, slip agents—project-dependent)

  • Compare supplier lots and detect formulation drift

  • Support failure analysis (delamination, cracking, residue formation, contamination)

Why Py-GC/MS (vs. Conventional GC-MS)?

Traditional GC-MS typically analyzes compounds that are already volatile or extractable. Many polymers and residues are not. Py-GC/MS enables:

  • Direct analysis of solids with minimal sample preparation

  • High-confidence polymer family identification through characteristic fragments

  • Detection of polymeric contaminants that do not appear in solvent extracts

  • Comparative fingerprinting when “unknown” material varies subtly between lots

Sample Types We Support

Py-GC/MS is well suited for (matrix-dependent):

  • Plastics and polymers: pellets, films, molded parts, fibers

  • Rubbers and elastomers: seals, gaskets, O-rings (project-dependent)

  • Adhesives and sealants: cured joints, tapes, PSA residues

  • Coatings and paints: flakes, chips, cured films, residues

  • Inks and printed layers (project-dependent)

  • Deposits and contaminants: gels, sludge, varnish, filter debris, black specks

  • Composite or filled materials (project-dependent): polymers with inorganic fillers

Typical Workflows

Material Identification (Unknown Polymer/Residue)

Best for: unknown solids, incoming verification

  • Pyrolysis fingerprint acquisition

  • Library/knowledge-based interpretation and polymer family assignment

  • Supporting evidence using complementary tools (FTIR/Raman, SEM-EDS) if needed

Comparative Fingerprinting (“What Changed?”)

Best for: supplier change, lot drift, stability aging

  • Side-by-side overlay of pyrolysis patterns

  • Highlighted differentiating peaks and likely chemical origins

  • Practical interpretation: formulation drift vs contamination vs degradation

Failure / Contamination Investigation

Best for: black specks, gels, deposits, delamination residues

  • Py-GC/MS to identify organic component(s)

  • Pair with SEM-EDS for inorganic fillers/particles and FTIR/Raman for confirmatory checks

  • Root-cause direction based on combined evidence

Typical Applications by Industry

  • Polymers & plastics: resin ID, additive/degradation signatures, black specks/gels

  • Adhesives & sealants: PSA ID, bond-line residue comparison, cure drift (project-dependent)

  • Coatings & paints: binder identification, residue/failure surface materials

  • Electronics & semiconductors (project-dependent): contamination films, polymer residues

  • Medical devices: silicone/polymer residue identification, particulate root-cause (project-dependent)

  • Lubricants & greases: varnish/sludge organic residue identification (project-dependent)

  • Food/cosmetics packaging (project-dependent): polymer contamination and odor-related residues

What You Receive

  • Pyrolysis chromatogram(s) with key peak labeling

  • Identification summary: likely polymer family/material type, confidence notes, and supporting rationale

  • Comparative difference summary (if reference vs suspect provided)

  • Recommendations for confirmatory testing when needed (e.g., FTIR, SEM-EDS, XPS)

Sample Submission Guidelines

Please provide

  • Sample description (polymer type if known), form (film/pellet/part/residue), and target question

  • Lot/batch IDs and any process or aging history (heat, UV, solvents, cleaning steps)

  • Reference/control sample whenever possible

  • SDS for hazardous or unknown materials

Typical sample amounts

  • Solids: 10–100 mg can be sufficient for Py-GC/MS (more is helpful for repeats)

  • Films/coatings: a few small pieces (clean, representative)

  • Residues/particles: as available (mg-level often workable)

Packaging tips

  • Avoid contamination: use clean tools and containers

  • Keep samples dry and sealed; separate reference vs suspect

  • For residues on parts, protect the residue area from rubbing/contact

FAQs

Py-GC/MS is primarily qualitative/semi-quantitative for identification and comparison. Absolute quantitation typically requires targeted methods with standards.

Often yes, especially when combined with SEM-EDS and FTIR/Raman to confirm inorganic/organic components.

FTIR is fast for polymer family ID on clean surfaces, but can struggle with mixtures, thin films, and low-level contaminants. Py-GC/MS can provide deeper chemical fingerprints, especially for complex blends and residues.

Inorganic fillers generally do not pyrolyze, but they can dilute organics. We often pair Py-GC/MS with SEM-EDS to characterize fillers and particles.

Yes. Pyrolysis consumes the analyzed portion of the sample.

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