Chemical analysis of silicon-carbide-containing raw materials and refractory products - Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents
适用范围:This part of ISO 21068 specifies methods for the determination of total nitrogen and nitrogen calculated assilicon nitride, total oxygen, and free metallic and oxidic components in silicon carbide raw ...
实施日期:2008-12-01
实施日期:2012-08-01
Standard Test Methods for Instrumental Determination of Carbon,Hydrogen,and Nitrogen in Petroleum Products and Lubricants
适用范围:<p>This is the first ASTM standard covering the simultaneous determination of carbon, hydrogen, and nitrogen in petroleum products and lubricants.</p> <p>Carbon, hydrogen, and particularly nitrogen ana...
实施日期:2010-05-01
Soil quality - Determination of total nitrogen - Modified Kjeldahl method (ISO 11261:1995)
适用范围:Determination of total nitrogen (NH<(Index)4>-N, NO<(Index)2>-N, NO<(Index)3>-N and organic N). Nitrogen in N-N-linkage, NO-linkage and some heterocyclos will only be determined in parts.#,,#
实施日期:1994-01-01
Soil quality. Determination of total nitrogen content by dry combustion (elemental analysis") first edition"
适用范围:This International Standard describes a method for the determination of the total nitrogen of soil after dry combustion. It is applicable to all types of soil. NOTE — The method was developed originall...
实施日期:1998-03-15
Grenzflaechenaktive Stoffe. Bestimmung des Gehalts an Gesamt-Basen-Stickstoff. Potentiometrische Titration Surface Active Agents-Determination of Total Base Nitrogen-Potentiometric Titration Agents de ...
适用范围:Surfactants, Surface chemistry, Chemical analysis and testing, Determination of content, Nitrogen, Potentiometric methods
实施日期:2002-03-05
Soil quality. Determination of nitrate nitrogen,ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant first edition
适用范围:This International Standard describes a method for the determination of soluble nitrogen fractions (nitrate, nitrite, ammonium and organic nitrogen) in a 0,01 mol/l calcium chloride extract of soil sam...
实施日期:1998-05-01
实施日期:2005-02-01
Tobacco and tobacco products-Determination of total nitrogen-Continuous flow mentod
适用范围:本标准规定了烟草中总氮的测定方法(不包括硝态氮)。 本标准适用于烟草和烟草制品。
发布日期:2002-09-12 实施日期:2002-12-01
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