氮 标准查询与下载
共找到 150 条与 氮 相关的标准，共 10 页
本标准规定了纯氮、高纯氮和超纯氮产品的技术要求、检验方法以及包装、标志、贮运、安全警示等。 本标准适用于空气分离或经净化得到的气态或液态的纯氮、高纯氮和超纯氮，主要用作保护气、置换气、反应气等。 分子式：N2 相对分子质量：28.0134（按2005年相对原子质量
Pure nitrogen and high purity nitrogen and ultra pure nitrogen
Fertilizers. Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
本规范规定了氮气及液氮的要求、质量保证规定和交货准备等。 本规范适用于深冷法分离空气生产的氮气及液氮的生产、检验和验收
Specification for gaseous nitrogen and liquid nitrogen
This European Standard specifies a method for the determination of any one form of nitrogen in the presence of any other form.The method is applicable
Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
This European Standard specifies a method for the determination of any one form of nitrogen in the presence of any other form. The method
Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
Full Description ADOPTED_FROM:EN 15750:2009 This document specifies two different methods (Methods A and B
Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
Full Description ADOPTED_FROM:CEN/TS 15750:2008 This document specifies two different methods (Methods A and B
Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
Nitrogen and Liquid Nitrogen Specifications
Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
本标准规定了肥料氮含量测定的紫外分光光度法、蒸馏后滴定法等试验方法。附录A规定了差减法测定肥料中有机态氮含量的试验方法。本标准适用于固体或液体肥料中硝态氮、铵态氮、酰胺态氮含量的测定。本标准也适用于土壤调理剂
Fertilizers.Determination of nitrate nitrogen, ammonium nitrogen, amide nitrogen contents
Fertilizers. Determination of different forms of nitrogen in the same sample: nitric, ammoniacal, cyanamide and urea nitrogen
Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version EN 15750:2009
Fertilizers – Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
