SIST EN 14787:2005

SLOVENSKI STANDARD
SIST EN 14787:2005
01-december-2005
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Fertilizers and liming materials - Determination of water content - Guidelines and
recommendations
Düngemittel und Calcium-/Magnesium-Bodenverbesserungsmittel - Bestimmung des
Wassergehaltes - Leitlinien und Empfehlungen
Engrais et amendements minéraux basiques - Détermination de la teneur en eau - Guide
et recommandations
Ta slovenski standard je istoveten z: EN 14787:2005
ICS:
65.080 Gnojila Fertilizers
SIST EN 14787:2005 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 14787:2005

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SIST EN 14787:2005
EUROPEAN STANDARD
EN 14787
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2005
ICS 65.080
English version
Fertilizers and liming materials - Determination of water content -
Guidelines and recommendations
Engrais et amendements minéraux basiques - Düngemittel und Calcium-/Magnesium-
Détermination de la teneur en eau - Guide et Bodenverbesserungsmittel - Bestimmung des
recommandations Wassergehaltes - Leitlinien und Empfehlungen
This European Standard was approved by CEN on 21 March 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14787:2005: E
worldwide for CEN national Members.

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SIST EN 14787:2005
EN 14787:2005 (E)
Contents
Page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 Methods for water determination.6
4.1 General.6
4.2 Gravimetric methods.6
4.3 Extraction methods .7
4.4 Overview of existing methods.7
5 Effect of grinding on water content .9
6 Summary.9
Bibliography .10

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SIST EN 14787:2005
EN 14787:2005 (E)
Foreword
This document (EN 14787:2005) has been prepared by Technical Committee CEN/TC 260 "Fertilizers and
liming materials", the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by November 2005, and conflicting national standards shall be withdrawn
at the latest by November 2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
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SIST EN 14787:2005
EN 14787:2005 (E)
Introduction
There are, at present, four standard methods (EN 12048, EN 12049, EN 13466-1 and EN 13466-2) available
for the determination of the water content in fertilizers and liming materials. Product quality characteristics of
fertilizers, especially physical and bulk behaviour properties, with effects on storing and handling, are to a
major extent governed by the water content of the solid fertilizer. Consequently the water content is a very
important parameter in production and product quality control. The term "moisture content" is often used to
describe the amount of water present in a fertilizer.
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SIST EN 14787:2005
EN 14787:2005 (E)
1 Scope
This document gives guidance on the choice for the appropriate method for the determination of the water
content, considering the form under which it is present in a specific fertilizer type, and on the interpretation of
the results.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 12048, Solid fertilizers and liming materials - Determination of moisture content - Gravimetric method by
drying at (105 +/- 2)°C (ISO 8190:1992, modified).
EN 12049, Solid fertilizers and liming materials - Determination of moisture content - Gravimetric method by
drying under reduced pressure (ISO 8189:1992, modified).
EN 12944-2, Fertilizers and liming materials and soil improvers - Vocabulary - Part 2: Terms relating to
fertilizers.
EN 13466-1, Fertilizers - Determination of water content (Karl Fischer methods) - Part 1: Methanol as
extracting medium.
EN 13466-2, Fertilizers - Determination of water content (Karl Fischer methods) - Part 2: 2-propanol as
extracting medium.

3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
NOTE Water can be present in a number of forms (see [1]). It can be present as a contaminant from the atmosphere or
it may be chemically bound within the sample.
3.1
essential water
water, in stoichiometric quantities, that forms an integral part of the molecular or crystal structure
3.2
water of crystallisation
essential water present in a stable solid hydrate
3.3
water of constitution
essential water that is released when the solid decomposes
3.4
non-essential water
water, in non-stoichiometric quantities, that is retained as a consequence of physical forces
NOTE The term "free water" is often used to describe non-essential water and best correlates to the physical
properties and bulk behaviour.
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SIST EN 14787:2005
EN 14787:2005 (E)
3.5
adsorbed water
non-essential water that is retained on the surface of solids in a humid environment
NOTE The amount of water that is adsorbed depends on the fertilizer type, humidity, temperature and the specific
surface area of the solid.
3.6
absorbed water
non-essential water that is held as a condensed phase in the capillaries of the solid
NOTE The quantity contained in the
...