各国药典氮气规格及氧气限度

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各国药典氮气规格及氧气限度

USP 两种规格

1.Nitrogen钢瓶装Nitrogen contains not less than 99.0 percent, by volume, of N2. Limitof oxygen— Not more than 1.0% of oxygen is present, determined as directed inthe Assay.

2.Nitrogen97 Percent . Nitrogen 97 Percent is Nitrogen produced from air by physicalseparation methods. It contains not less than 97.0 percent, by volume, of N2. Limitof oxygen— Not more than 3.0% of oxygen is present, determined as directed inthe Assay.

欧洲药典 两种规格

1.NITROGEN,LOW-OXYGEN Content: minimum 99.5 per cent V/V of N2, calculated by deduction ofthe sum of impurities found when performing

thetest for impurities. Oxygen: maximum 5 ppm V/V, determined using an oxygen analyserwith a detector scale ranging from 0 ppm V/V to 100 ppm V/V and equipped withan electrochemical cell.

2.NITROGENContent: minimum 99.5 per cent V/V of N2.

Oxygen:maximum 50 ppm V/V, determined using an oxygen analyser with a detector scaleranging from 0-100 ppm V/V and equipped with an electrochemical cell.

日本药典 一种规格

Itcontains not less than 99.5 volz of nitrogen (N2). Purity Oxygen—The peak areaof oxygen obtained from Nitrogen in the Assay is not larger than 1/2 times thatfrom the standard gas mixture

中国药典 尚未收载氮气

市售工业氮气规格

1.分子筛制氮机技术参数：氮气纯度：≥97~99.9995%

2.钢瓶装氮气：工业氮99.5%；纯氮99.99%；高纯氮99.999%；超纯氮99.9999%

wo2008zhc

在你的基础上整理的，感谢

阿白6311

感谢分享，正好有用