Accurate determination method for content of oxygen element in manganese-based alloy

The invention relates to an accurate determination method for content of oxygen element in manganese-based alloy, which adopts an oxygen-nitrogen analyzer to measure the content of oxygen in the manganese-based alloy by using a pulse heating inert gas melting-infrared absorption method, and comprises the following steps: preparing test conditions; preparing a sample; performing a blank test; performing drift calibration; verifying and analyzing; analyzing a manganese-based sample; and deducting the analysis blank of the manganese-based alloy scrap sample. The method has the advantages that the content of the oxygen element in the manganese-based alloy can be accurately measured by the oxygen-nitrogen analyzer, and compared with other detection methods, so that the problem that the content of the oxygen element in the manganese-based alloy cannot be accurately measured due to the fact that the content of the oxygen element in the manganese-based alloy is gradually reduced along with increase of the number of t