ISO-5315 › Fertilizers - Determination of total nitrogen content - Titrimetric method after distillation
ISO-5315
-
1ST EDITION
-
CURRENT
Document Center Inc. is an authorized dealer of ISO standards.
The following bibliographic material is provided to assist you with your purchasing decision:
The following bibliographic material is provided to assist you with your purchasing decision:
The method consists in reducing of nitrate to ammonia by chromium powder in acid medium, converting of organic and urea nitrogen into ammonium sulfate by digestion with concentrated sulfuric acid in the presence of a catalyst, distilling of the ammonia from an alkaline solution and absorbing in an excess of standard volumetric sodium hydroxide solution. The method is not recommended for materials containing more than 7 % of organic matter.
To find similar documents by classification:
65.080 (Fertilizers Including soil conditioners and culture medium)
This document comes with our free Notification Service, good for the life of the document.
This document is available in either Paper or PDF format.
Document Number
ISO 5315:1984
Revision Level
1ST EDITION
Status
Current
Publication Date
June 1, 1984
Committee Number
ISO TC 134/SC 4/WG 1