Labthink Reference Film for Gas Permeability Tester Calibration

Overview

The Labthink Reference Film is a certified reference material (CRM) engineered specifically for calibration, verification, and performance validation of gas permeability testing instruments—particularly those operating under standardized methods such as ASTM D3985 (oxygen transmission rate), ASTM F2622 (multiple gases via tracer gas), ISO 15105-1/-2 (gas transmission rate determination), and GB/T 1038 (plastic film and sheeting). Designed in strict accordance with metrological traceability principles, each batch undergoes rigorous inter-laboratory characterization to ensure reproducibility across measurement platforms. The film functions as a stable, inert, and dimensionally consistent permeation barrier whose intrinsic gas transmission properties are invariant under controlled temperature and relative humidity conditions. Unlike generic polymer films, Labthink Reference Films are manufactured under ISO/IEC 17025-accredited processes, with certified uncertainty budgets reported per NIST SP 800-171 and ISO Guide 35 requirements. Their primary role is to anchor instrument drift correction, validate sensor linearity, and support GLP-compliant audit trails during routine QC/QA cycles in packaging R&D labs and regulatory submission environments.

Key Features

• Two certified polymer variants: Polycarbonate (PC) and Polyethylene Terephthalate (PET), each with independently validated O₂, CO₂, and N₂ transmission rates at 23°C/0% RH and 38°C/90% RH
• Traceable to NIST SRM 1470 (PET-based) and NIST-traceable PC reference data sets; full CoA includes expanded uncertainty (k=2) for all reported permeability values
• Precision die-cut geometry: nominal diameter 97 mm ± 0.1 mm, thickness tolerance ±1.5 µm (verified by laser interferometry)
• Batch-specific certification: each lot includes a digital certificate compliant with FDA 21 CFR Part 11 (electronic signatures, audit trail, data integrity controls)
• Stable shelf life: ≥24 months when stored at 23±2°C, <40% RH, protected from UV exposure and mechanical stress
• No post-manufacturing conditioning required—ready for immediate use in ASTM D3985, ISO 15105, or custom gravimetric/manometric protocols

Sample Compatibility & Compliance

Labthink Reference Films are compatible with all commercially available gas permeability analyzers utilizing coulometric, infrared, paramagnetic, or thermal conductivity detection—including MOCON Ox-Tran, Systech Instruments 8000 series, and modern Labthink VAC-V2 and PERME® platforms. Each film meets the physical stability criteria defined in ISO 17034 for reference material producers and conforms to ASTM E691 interlaboratory precision guidelines. PET variants align directly with NIST Standard Reference Material 1470 specifications for oxygen transmission rate (OTR) calibration, while PC films satisfy the dimensional and thermal expansion constraints outlined in ISO 2556 for manometric test cells. All materials are supplied in inert aluminum-laminated pouches with desiccant, ensuring zero moisture uptake prior to first use—critical for maintaining certified OTR accuracy within ±1.8% (k=2) over the stated shelf life.

Software & Data Management

Reference film calibration data are integrated into Labthink’s proprietary PermeationSuite™ software (v4.2+), enabling automated drift compensation, multi-point linearity verification, and real-time comparison against certified values. The system supports CSV/XLSX export of raw sensor output, calculated transmission rates, and uncertainty propagation reports aligned with GUM (JCGM 100:2008). Audit logs record operator ID, timestamp, environmental chamber readings (T/RH), and film lot number—fully compliant with GLP, GMP Annex 11, and FDA 21 CFR Part 11 requirements for electronic records and signatures. Optional API integration allows synchronization with LIMS platforms (e.g., LabWare, Thermo Fisher SampleManager) for centralized reference material lifecycle tracking.

Applications

• Annual instrument qualification (IQ/OQ/PQ) for packaging permeability analyzers in pharmaceutical primary packaging validation
• Method transfer verification between QC labs using different gas detection technologies (e.g., coulometric vs. IR)
• Uncertainty budget development per ISO/IEC 17025 clause 7.6.2 for accredited testing laboratories
• Training and proficiency testing for new analysts performing ASTM F1307 or ISO 15105-1 measurements
• Supporting regulatory submissions (e.g., FDA IND/NDA, EMA CTD Module 3) requiring documented metrological traceability of barrier property data
• Internal calibration frequency optimization—enabling extended recalibration intervals where statistical process control demonstrates stability

FAQ

What is the difference between Labthink PC and PET reference films?
PC films offer lower inherent OTR and superior dimensional stability across wide temperature ranges (–60°C to +120°C), making them ideal for high-precision baseline calibration. PET films match NIST SRM 1470 and are preferred for method validation where direct comparability to established reference data is required.
Can these films be reused after initial testing?
No. Each film is designated for single-use only to prevent surface contamination, micro-scratching, or sorption-induced property drift. Reuse invalidates certified uncertainty values.
How is traceability to NIST maintained without physical SRM shipment?
Labthink maintains active collaboration with NMI partners (including NIM China and PTB Germany) and participates in CCQM key comparisons. Certificates include documented linkage paths through interlaboratory studies and uncertainty modeling per ISO Guide 35.
Do you provide uncertainty budgets for custom thickness configurations?
Yes—custom thickness variants (e.g., 50 µm ±0.5 µm PC) are available with full GUM-compliant uncertainty analysis upon request, subject to minimum order quantities.
Is storage under inert atmosphere required?
No. Aluminum-laminated packaging with integrated desiccant ensures sufficient protection under standard ambient lab storage conditions. Nitrogen purging is unnecessary and not recommended due to potential seal integrity compromise.