SKC Tedlar Gas Sampling Bags
| Brand | SKC |
|---|---|
| Origin | USA |
| Model | Tedlar |
| Material | DuPont™ Tedlar® Polyvinyl Fluoride (PVF) Film |
| Thickness | 2 mil (50.8 µm) |
| Temperature Range | -72°C to +107°C |
| VOC Recovery | ≥80% after ≥48 hours |
| Compliance | EPA Method TO-14A, TO-15, and TCLP-compatible |
| Fitting Options | Single polypropylene inlet/outlet or dual stainless steel valves |
| Volume Options | 1 L, 3 L, 5 L |
| Base Contamination | Ultra-low VOC background |
Overview
The SKC Tedlar Gas Sampling Bags are precision-engineered passive collection devices designed for the reliable, contamination-free capture and short-term storage of ambient, stack, or indoor air samples—particularly those containing volatile organic compounds (VOCs), inorganic gases, and reactive sulfur species. Constructed from certified DuPont™ Tedlar® polyvinyl fluoride (PVF) film, these bags deliver exceptional chemical inertness, low permeability, and ultra-low extractable background levels—critical attributes for trace-level gas analysis by GC-FID, GC-MS, or FTIR. Unlike polyethylene or Mylar alternatives, Tedlar exhibits minimal adsorption and negligible leaching of hydrocarbons or halogenated compounds, enabling high-fidelity sample integrity over 48–72 hours under controlled handling conditions. The bags operate on a grab-sampling principle: when paired with SKC’s Grab Air or Pocket Pump TOUCH sampling pumps, they facilitate rapid, pressure-balanced filling without introducing mechanical contamination or catalytic artifacts.
Key Features
- DuPont™ Tedlar® PVF film—certified for ultra-low VOC background and long-term stability of target analytes including benzene, toluene, xylene (BTX), chlorinated solvents, H2S, CO, CO2, CH4, and SF6
- Rated continuous service temperature range of −72°C to +107°C—validated for use in extreme environments such as industrial stacks, HVAC ducts, fume hoods, and outdoor ambient monitoring stations
- Two fitting configurations: lightweight single-port polypropylene valve assembly (optimized for field portability and cost-sensitive applications) or dual-port stainless steel valves (enabling simultaneous sampling and analytical injection with minimal dead volume)
- Consistent 2 mil (50.8 µm) film thickness—ensuring uniform tensile strength (>20 MPa), puncture resistance, and dimensional stability during transport and storage
- EPA-compliant design: validated for use in Methods TO-14A (ambient air), TO-15 (canister alternative), and TCLP (toxicity characteristic leaching procedure) gas-phase extraction protocols
Sample Compatibility & Compliance
SKC Tedlar bags meet stringent material compatibility requirements for regulatory and research-grade sampling. Independent validation studies confirm ≥80% recovery of C2–C12 VOCs after 48 hours at 25°C; recovery remains >70% for H2S and methyl mercaptan under sealed, shaded conditions. The PVF substrate is non-reactive toward acidic, basic, and oxidizing gases—including NOx, SO2, and ozone—when used within specified temperature limits. All batches undergo lot-specific VOC background testing per ASTM D6196 and ISO 16000-6, with certificate of analysis available upon request. The bags support GLP-aligned workflows: each box includes lot traceability, expiration dating, and documentation compatible with FDA 21 CFR Part 11–enabled data management systems when integrated with SKC’s digital sampling log software.
Software & Data Management
While the Tedlar bag itself is a passive consumable, its integration into auditable sampling workflows is enabled through SKC’s companion digital tools. The Pocket Pump TOUCH device features Bluetooth connectivity and embedded sampling event logging—including time-stamped start/stop, pump cycles, ambient temperature/humidity (via optional sensor), and operator ID. Data syncs to SKC’s cloud-based AirTrack™ platform, where users can generate chain-of-custody reports, assign EPA method tags (e.g., TO-15), and export CSV/Excel files compliant with laboratory information management systems (LIMS). Audit trails include immutable timestamps, user authentication, and electronic signatures—fully aligned with ISO/IEC 17025 and EPA QA/G-5 requirements.
Applications
- Ambient air quality monitoring per NAAQS and EU Directive 2008/50/EC
- Industrial hygiene assessments in petrochemical, semiconductor, and pharmaceutical manufacturing facilities
- Indoor air quality (IAQ) investigations in schools, hospitals, and office buildings
- Stack emission testing for compliance with 40 CFR Part 60 and Part 63
- Soil vapor intrusion (SVI) screening using sub-slab or borehole sampling
- Method development and reference standard preparation in accredited environmental laboratories
FAQ
What is the maximum recommended storage duration for VOC samples in Tedlar bags?
Samples should be analyzed within 72 hours of collection. For optimal recovery of reactive compounds (e.g., aldehydes, terpenes), analysis within 24 hours is advised.
Can Tedlar bags be reused?
No. These are single-use, disposable sampling devices. Reuse introduces cross-contamination risk and compromises quantitative accuracy.
Are Tedlar bags suitable for hydrogen sulfide (H2S) sampling?
Yes—Tedlar demonstrates ≥75% H2S recovery after 48 hours when protected from light and stored below 30°C.
Do I need a special pump to fill Tedlar bags?
SKC recommends the Grab Air or Pocket Pump TOUCH for consistent, low-shear filling. Manual inflation is not advised due to potential moisture and CO2 contamination from exhaled breath.
How are Tedlar bags sterilized prior to use?
They are manufactured and packaged under cleanroom conditions (ISO Class 7) and require no field sterilization. Autoclaving or chemical treatment will degrade the PVF film.
