医用氮气中规定：
含氧气不得过 0.005%。
含水分不得过 0.0067%。
浩瀚色谱（山东）应用技术开发有限公司，研发气相色谱法测定药典氮气中微量氧和水分的含量，面积外标法定量，结果满意。
浩瀚色谱，提供详细的分析方案
Medical nitrogen specifies:
The oxygen content should not exceed 0.005%.
The moisture content should not exceed 0.0067%.
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has developed a gas chromatography method to determine the content of trace oxygen and water in the nitrogen gas of the Pharmacopoeia. The area external standard method has been used for quantification with satisfactory results.
Vast chromatography, providing detailed analysis plans
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