O2Anteile

O2Anteile is a term used to describe the share or fraction of oxygen present in a system, whether it is a gas mixture, a liquid, or a biological context. It can be expressed as a volume fraction (vol%), a molar fraction, or as a partial pressure (pO2). The concept is applied across science, engineering and medicine to indicate how much oxygen is available or present.

In atmospheric and industrial contexts, the O2Anteile of a gas mixture is a key parameter. Dry air at sea level contains about 21% oxygen by volume, but this fraction varies with altitude, humidity and temperature. In combustion, refining and welding, monitoring O2Anteile helps control oxidation, flame temperature and process safety. Measurements rely on gas analyzers, electrochemical sensors or infrared spectroscopy.

In medicine and physiology, O2Anteile relate to oxygen delivery to tissues. Oxygen content in blood is described by pO2, oxygen saturation (SaO2) and oxygen content (CaO2). These values inform arterial blood gas analysis, respiratory support, and assessment of respiratory or circulatory adequacy. The term complements other O2-related measures such as dissolved oxygen in fluids.

In aquatic and environmental contexts, dissolved oxygen constitutes the O2Anteile of water. Expressed as mg/L or percent saturation, it indicates ecological health and is monitored in drinking water, wastewater treatment and fish habitats. DO is measured by Winkler titration or optical sensors.

In industry and research, O2Anteile specify the oxygen composition of gas mixtures used for processes, storage, and safety-critical applications, ensuring consistent performance and compliance with standards. See also Sauerstoffanteil, pO2, SaO2, CaO2.