Objective Oxygen-enriched air generated by pressure swing adsorption (PSA) equipment is usually used for clinical treatment and the quality control is highly required to ensure the patients’ safety. Parts of the test method description in the current industry standard (YY 0298-1998) of PSA oxygen generator’s physicochemical properties are not feasible. This study adjusts and validates the test methods of the content of carbon monoxide, the content of carbon dioxide, the content of solid substances and the particle diameter of solid substance in the physicochemical properties of oxygen-enriched air. Methods The content of CO and CO2 could be detected simultaneously by optimization of gas path and detection efficiency was improved. The syringe filter was used in the test for solid content instead of particle collector, and the inverted microscope was used in the test of particle size. Results The minimum detection limits of CO and CO2 were 0.1×10-6(volume fraction) and 0.08×10-6(volume fraction), respectively. The methodology validation was carried out and conformed to the provisions. The content of solid substances was less than 0.1mg/m3. The maximum particle diameter was 4.00μm. Conclusions PSA oxygen generator was tested by optimizing the test methods based on the current standard. These methods were accurate and reliable and it had important practical significance for the evaluation of PSA oxygen generator.
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