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How to Analyze the Influence of The Interference Impurities of The Trace Oxygen Analyzer?

The principle of the trace oxygen analyzer includes chemical cell method, primary cell method, fuel cell method, Hertz cell method and concentration cell method. It can be used for high-temperature sintering furnace protective gases such as air separation nitrogen industry, chemical processes, magnetic materials, electronic industry protective gases, and online analysis of oxygen content in metallurgy, glass, and building materials industries.

The trace oxygen analyzer adopts imported fuel cell sensor, which has the characteristics of long life, high accuracy and fast response. It is used for the measurement of trace oxygen in high-purity hydrogen and other reducing gases, using large-screen dot matrix LCD liquid crystal display. The temperature is automatically compensated to eliminate the influence of ambient temperature, and the upper and lower limit control points can be set arbitrarily within the full range.

When performing trace oxygen analysis, due to the high oxygen content in the air, improper handling can easily cause contamination and interference to the sample, and the analysis result data is abnormal. Some factors may affect the measurement and use of the trace oxygen analyzer, such as:

1. Background gas interference

Like a fuel cell analyzer, different main background gases (related to the molar mass of the background gas) will affect the analysis results. And a small amount of hydrogen will also have a greater impact on the analysis results. For the case where the sample gas contains trace acid gas, only a special type of Hertz battery oxygen analyzer can eliminate the interference, prevent the sensor from being poisoned, and provide correct analysis data. No other fuel cell oxygen analyzer can be used for acid gas analysis.

2. The influence of interference impurities

Interfering impurities mainly refer to a small amount of unknown impurities in addition to the background gas and the components to be measured. For example, the fuel cell micro-oxygen meter is sensitive to acidic and oxidizing gases. If the gas contains acidic gas components, such as CO2, H2S, HCl, HCN, etc. , The fuel pool sensor is prone to poisoning and failure. The trace amount of reducing gas has an impact on the analysis results of the zirconia micro-oxygen analyzer. Recently, it has been discovered that a trace of N2O has an impact on the zirconia-type trace oxygen analyzer. Therefore, the presence of impurities should be fully considered when testing, and the appropriate The analyzer can get accurate results.

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