SKC Impingers Impact Absorption Bottles

Overview

SKC Impingers are precision-engineered impact absorption bottles designed for quantitative collection of airborne contaminants—including gases, vapors, and aerosols—into liquid absorbent media during active air sampling. Operating on the principle of impaction, these devices direct sampled air at high velocity through a narrow nozzle or fritted tip into a reservoir of collection solution (e.g., water, alkaline buffers, or organic solvents), where target analytes undergo dissolution, chemical reaction, or hydrolysis. This method ensures high collection efficiency for reactive or soluble compounds such as formaldehyde, hydrogen sulfide, ammonia, chlorine, ozone, and volatile organic acids—making SKC Impingers indispensable in occupational hygiene, industrial hygiene monitoring, and regulatory compliance programs aligned with OSHA, NIOSH, and ISO 16000-7 methodologies.

Key Features

• High-precision glass construction: SKC Midget Impingers are manufactured from borosilicate Pyrex® glass, calibrated to ±0.5 mL accuracy across the 25 mL volume range. Dual laser-etched serial numbers on both body and cap ensure traceable sample identification and component pairing for audit-ready workflows.
• Optimized nozzle configurations: Available with either standard tapered nozzles or sintered glass frits (170–200 µm pore size) to maximize gas–liquid interfacial contact area and enhance mass transfer efficiency—critical for low-concentration or rapidly reacting analytes.
• Anti-spill design: Integrated downward-angled side-arm outlet prevents overflow during pump operation or transport, accommodating full liquid volumes even under variable flow rates (typically 0.1–3 L/min) and extended sampling durations (up to 8 hours).
• PFA alternative for aggressive chemistries: Savillex® PFA (perfluoroalkoxy alkane) Impingers offer exceptional chemical inertness, thermal stability (–200 °C to +260 °C), ultra-low extractables (<10 pg/g metal, <50 pg/g organics), and compatibility with sterilization via autoclave, gamma irradiation, ethylene oxide, or e-beam—ideal for trace-metal analysis, pharmaceutical cleanroom validation, and high-purity solvent applications.
• Modular port architecture: PFA models feature standardized 1/4″ NPT ports—either vertical–vertical (225-0021) or vertical–horizontal (225-0020)—enabling leak-tight integration into multi-stage sampling trains using PFA tubing (e.g., 225-0022, 225-0023) and sealing hardware (O-ring gasket nuts).

Sample Compatibility & Compliance

SKC Impingers support sampling protocols compliant with NIOSH Methods 2016 (formaldehyde), 6001 (hydrogen sulfide), 6002 (ammonia), and OSHA ID-121 (chlorine). Their geometry and material integrity meet ASTM D1357 (standard practice for air sampling) and ISO 16000-7 (indoor air—determination of formaldehyde). Glass units conform to USP Class A volumetric tolerance standards; PFA variants comply with FDA 21 CFR Part 11 requirements when used within validated analytical workflows featuring electronic audit trails and user-access controls.

Software & Data Management

While Impingers themselves are passive collection devices, they integrate seamlessly with SKC’s AirCheck TOUCH and legacy AirChek XR5000 sampling pumps—both equipped with real-time flow logging, temperature/pressure compensation, and Bluetooth-enabled data export. Sample metadata (lot number, operator ID, start/stop time, flow rate) is recorded in accordance with GLP/GMP documentation standards. When paired with SKC’s AirMetrics™ cloud platform, raw pump logs synchronize automatically with laboratory LIMS systems, enabling chain-of-custody tracking from field deployment through GC-MS or IC analysis.

Applications

• Occupational exposure assessment for reactive gases in chemical manufacturing, wastewater treatment, and semiconductor fabrication
• Indoor air quality (IAQ) surveys targeting formaldehyde emissions from composite wood products
• Pharmaceutical facility environmental monitoring per ICH Q5C and EU GMP Annex 1
• Method validation studies requiring high-fidelity capture of unstable analytes prone to wall loss or adsorption
• Research applications involving speciation of oxidized sulfur/nitrogen species in ambient air chemistry

FAQ

What is the maximum recommended sampling flow rate for SKC Impingers?
For optimal collection efficiency and minimal breakthrough, use 0.2–2.0 L/min depending on analyte volatility and absorbent chemistry—refer to NIOSH Manual of Analytical Methods (NMAM) for compound-specific guidance.
Can PFA Impingers be used with acidic digestions prior to ICP-MS analysis?
Yes. Savillex PFA exhibits negligible leaching under hot HNO₃/HF/HCl mixtures up to 220 °C, making it suitable for EPA Method 200.8 and ISO 17294-2 digestion protocols.
Do SKC Impingers require calibration before use?
Glass units are factory-calibrated to ±0.5 mL and do not require recalibration; however, volumetric verification using certified Class A glassware is recommended for GLP audits.
Are replacement nozzles and frits available separately?
Yes—part numbers 225-36-1 (standard nozzle), 225-36-2 (fritted), and 225-36-5 (fritted anti-spill) are stocked for routine maintenance and method flexibility.
How should Impingers be decontaminated between samples?
Rinse thoroughly with high-purity water followed by appropriate solvent (e.g., methanol for organics); dry in laminar flow hood. For PFA units, autoclaving at 121 °C for 20 min is acceptable if residual matrix permits.