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SIST EN 12945:2014/oprA1:2015
01-februar-2015
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Liming materials - Determination of neutralizing value - Titrimetric methods
Kalkdünger - Bestimmung des Neutralisationswertes - Titrimetrische Verfahren
Amendements minéraux basiques - Détermination de la valeur neutralisante - Méthodes
par titrimétrie
Ta slovenski standard je istoveten z: EN 12945:2014/prA1
ICS:
65.080 Gnojila Fertilizers
SIST EN 12945:2014/oprA1:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 12945:2014/oprA1:2015
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SIST EN 12945:2014/oprA1:2015
EUROPEAN STANDARD
DRAFT
EN 12945:2014
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
December 2014
ICS 65.080
English Version
Liming materials - Determination of neutralizing value -
Titrimetric methods
Amendements minéraux basiques - Détermination de la Kalkdünger - Bestimmung des Neutralisationswertes -
valeur neutralisante - Méthodes par titrimétrie Titrimetrische Verfahren
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 260.
This draft amendment A1, if approved, will modify the European Standard EN 12945:2014. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment was established by CEN 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 CEN-CENELEC Management Centre has
the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12945:2014/prA1:2014 E
worldwide for CEN national Members.
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SIST EN 12945:2014/oprA1:2015
EN 12945:2014/prA1:2014 (E)
Contents
Page
Foreword .3
1 Modification to Clause 9, Calculation and expression of results for method A and
method B .4
2 Modification to Annex .4
2
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SIST EN 12945:2014/oprA1:2015
EN 12945:2014/prA1:2014 (E)
Foreword
This document (EN 12945:2014/prA1:2014) has been prepared by Technical Committee CEN/TC 260
“Fertilizers and liming materials”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12945:2014.
3
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SIST EN 12945:2014/oprA1:2015
EN 12945:2014/prA1:2014 (E)
1 Modification to Clause 9, Calculation and expression of results for method A and
method B
Under 9.1 modify Formula (1) and the explanations of symbols as follows:
C× (M ×V × f × A− M ×V × f )×100
1 1 1 2 2 2
N = (1)
d
m× A
t
where
C
is the factor to convert hydrochloric acid standard solution consumption into CaO or
-
HO equivalent;
C
= 0,028 when neutralizing value should be expressed as CaO
-
C
= 0,017 when neutralizing value should be expressed as HO
M is the molarity of hydrochloric acid standard solution (5.2), in mol/l;
1
V is the total volume of hydrochloric acid standard solution (5.2), in millilitres;
1
f is the factor of hydrochloric acid standard solut
...