In the oxygen content analysis, especially in the treatment of rheumatoid arthritis, because the oxygen content in the air is as high as 21% O2, if the improper treatment is so easy to contaminate and interfere with the sample, the analysis result data is incorrect. The main reason is that the oxygen detector is not operating properly. Here are just a few of the factors that influence the measurement:
Simplification and cleanliness of the oxygen detector air circuit switcher.
Microanalysis requires effective elevator maintenance to eliminate the contamination of the sample tubes, valves, meters, etc. on the gas path. Therefore, the pneumatic switch should be simplified as much as possible, and a connector with a small dead angle should be selected. Moreover, avoid using water seals, oil seals and wax seals to prevent dissolved oxygen from escaping and causing pollution. It is also necessary to avoid the addition of purification equipment that is easily contaminated on the pipeline leading to the oxygen analyzer inlet. Only in this way can the switch be clean and the data obtained accurate.
The choice of pipe material.
Pipeline material and surface roughness Interferon side effects will also affect the change in oxygen content in the sample gas. It is generally not advisable to use plastic pipes, rubber pipes, etc. as connecting pipes. Copper or stainless steel tubes are usually used. For ultra-micro analysis (<0.1ppm), polished stainless steel tubes are required.
Leakage problem with the oxygen detector.
The oxygen detector must be strictly leak tested before it is first turned on. The oxygen analyzer can only get accurate data in the results of the Induction heating machine without being leaked. Any connection points, solder joints, valves, etc. are not tight, which will cause oxygen in the air to reverse osmosis into the pipeline and the oxygen analyzer, resulting in high oxygen content.
Contamination of the oxygen detector.
When reusing the oxygen detector, firstly, the self-adhesive fireproof tape must pay attention to whether air is leaking when connecting the sampling line, and the leaked air must be carefully blown out, and a large amount of oxygen should not be passed through the sensor to prolong the life of the sensor. . In the process of purifying the pipeline switcher, in order to shorten the purification time, there is a certain method for the Johnson rotary joint, and the high-pressure venting and small-flow blowing alternately can be used to rapidly purify the pipeline.
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