歐洲藥典定義了兩種類型的氮氣：“醫(yī)用氮氣”和“低氧氮氣”。顧名思義，前者（醫(yī)用氮氣）是用于醫(yī)療用途的，如醫(yī)院。后者可用于如對氧敏感的藥品的惰性保護。然而并沒有水分、油分或者粒子的標準。僅僅要求低氧含量氮氣純度99.5%貌似是不充分的。根據(jù)生產(chǎn)、儲存和運輸?shù)那闆r，剩下的0.5%可能就包含水分、油分等。
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浩瀚色譜（山東）應用技術(shù)開發(fā)有限公司，采用5A分子篩測定N2，峰型對稱，面積歸一法定量，結(jié)果滿意。
名稱：填充柱
固定相：分子篩
型號：5A
規(guī)格：6m*1/8
應用：藥典氮氣
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The European Pharmacopoeia defines two types of nitrogen gas: "medical nitrogen gas" and "low oxygen nitrogen gas". As the name suggests, the former (medical nitrogen) is used for medical purposes, such as hospitals. The latter can be used for inert protection of drugs that are sensitive to oxygen. However, there are no standards for moisture, oil, or particles. Simply requiring a low oxygen content nitrogen purity of 99.5% seems insufficient. According to production, storage, and transportation conditions, the remaining 0.5% may contain moisture, oil, etc.
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. used 5A molecular sieve to determine N2, with symmetrical peak shape and quantitative analysis using area normalization method, with satisfactory results.
Name: Filled Column
Fixed phase: molecular sieve
Model: 5A
Specification: 6m * 1/8
Application: Pharmacopoeia Nitrogen
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