Dedicated Oxygen Removal Membrane Testing Service for Global Industries
As an ISO/IEC 17025 accredited laboratory, we provide a specialized oxygen removal membrane testing service that validates degassing efficiency, physical integrity, chemical resistance, and long-term durability. Our oxygen removal membrane testing service supports manufacturers and exporters of hollow fiber and flat sheet membrane contactors supplying the semiconductor, power generation, pharmaceutical, and food and beverage sectors across Europe, North America, and Asia. Every test is conducted under our CNAS-accredited quality system, delivering data accepted by global end-users and regulatory authorities.
Product Samples We Regularly Test
- Hollow fiber oxygen removal membrane contactors — polypropylene and PVDF membranes for boiler feedwater and ultrapure water systems
- Flat sheet degassing membrane modules — for inline dissolved oxygen control in analytical and medical devices
- Vacuum-assisted oxygen removal membrane systems — integrated units with vacuum pumps for high-efficiency O2 stripping
- Sweep gas membrane degassers — nitrogen or argon purge modules for dissolved gas removal in microelectronics
- Composite and fluoropolymer oxygen removal membranes — high-temperature and chemically aggressive fluid degassing
Oxygen Removal Efficiency and Mass Transfer Performance Testing
- Dissolved oxygen removal rate and outlet concentration monitoring — using optical luminescence or polarographic sensors per ASTM D5462 and ASTM D888, the inlet and outlet dissolved oxygen levels are continuously logged under controlled water flow, vacuum level, and temperature to determine the percentage removal and the achievable ppb-level outlet specification.
- Mass transfer coefficient and membrane contactor efficiency — the overall mass transfer coefficient is calculated from the logarithmic mean concentration driving force, providing a design parameter that is independent of the specific test rig and scalable for industrial module sizing.
- Flow rate and vacuum pressure optimization curves — the oxygen removal performance is mapped as a function of liquid flow rate, gas-side vacuum or sweep flow, and water temperature to define the operating envelope for the membrane contactor.
- Dissolved nitrogen and total gas removal verification — where the same membrane is used for combined degassing, the removal of dissolved nitrogen and the total dissolved gas pressure are measured per ASTM D5543.
Physical and Morphological Characterization of Oxygen Removal Membranes
- Membrane surface and cross-section morphology by scanning electron microscopy — high-resolution SEM imaging per ASTM E1508 quantifies pore size, porosity gradient, skin layer thickness, and the presence of defects across the membrane wall.
- Contact angle and surface hydrophobicity measurement — the sessile drop method per ASTM D7334 evaluates the wetting behavior of the membrane material, critical for maintaining gas-liquid separation and resisting wet-out during oxygen removal operation.
- Porosity, pore size distribution, and gas permeability — mercury intrusion porosimetry per ISO 15901-1 and bubble point testing per ASTM F316 determine the pore size distribution, while single-gas permeation tests measure the intrinsic permeability that governs oxygen flux.
Mechanical Strength and Pressure Integrity Testing of Oxygen Removal Membranes
- Burst pressure and collapse pressure testing — the membrane fiber or module is pressurized hydraulically or pneumatically per ASTM D6903 and ISO 2942 until failure, establishing the maximum allowable operating pressure on both the liquid and gas sides.
- Tensile strength and elongation of hollow fibers and flat sheet — testing per ISO 527-1 and ASTM D638 determines the force and stretch at break, ensuring the membrane can withstand handling and module potting stresses.
- Gas integrity and leak detection by pressure decay method — the membrane module is pressurized with nitrogen and the pressure decay rate is monitored over time per ASTM F2095 to detect pinholes and seal failures that would allow water ingress into the gas side.
- Vacuum retention and leak-up rate under service conditions — the vacuum-side leak-up rate is measured with a calibrated vacuum gauge to verify that the module and seals can maintain the required vacuum level for oxygen stripping over extended periods.
Chemical Compatibility and Clean-in-Place Resistance in Oxygen Removal Membrane Testing
- Resistance to acids, alkalis, and oxidizing biocides — membrane samples are immersed in representative cleaning solutions at elevated temperatures per ASTM D543, and the change in tensile strength, oxygen removal performance, and surface hydrophobicity is recorded.
- Hot water and steam sanitization endurance — the membrane is exposed to repeated hot water cycles at 85–95 °C per FDA and 3-A sanitary guidelines, then retested for oxygen removal efficiency and mechanical integrity to verify compatibility with hygienic processes.
- Solvent and surfactant exposure testing — common system cleaners and surfactants are applied per ISO 175, followed by contact angle measurement and performance retest to confirm the membrane does not wet out or lose function.
Extractables, Leachables, and Water Quality Impact Testing
- Total organic carbon and conductivity contribution — the membrane module is flushed with ultrapure water per SEMI F-57 and ASTM D5997, and the TOC and conductivity of the effluent are monitored to confirm the oxygen removal membrane meets semiconductor-grade cleanliness.
- Non-volatile residue and particle shedding — the membrane is subjected to a defined water flush and the eluted particles are counted per SEMI F-40 and ISO 4406 to demonstrate cleanliness for pharmaceutical and analytical applications.
- Extractable metals and ions by ICP-MS — water extracts are analyzed for sodium, potassium, iron, and other critical elements per USP <645> and ASTM D5673 to ensure the membrane material does not leach contaminants into the treated water.
Report Recognition and ISO/IEC 17025 Compliance
All methods described in this oxygen removal membrane testing service are covered by our ISO/IEC 17025 scope of accreditation. Our reports are accepted by notified bodies in Europe, semiconductor equipment manufacturers, pharmaceutical validation teams, and power plant engineering contractors worldwide. Whether you require a full qualification dossier for a new membrane contactor, a batch release inspection, or a failure investigation, our laboratory delivers the precision and technical depth that global degassing applications demand.
