SIST EN 12945:2014/kprA1:2016
(Amendment)Liming materials - Determination of neutralizing value - Titrimetric methods
Liming materials - Determination of neutralizing value - Titrimetric methods
This document specifies two methods for the determination of the neutralizing value (NV) of liming materials. Method A is applicable to all liming materials except silicate liming materials. Method B is applicable to all liming materials. Both methods do not correctly take into account the potential neutralizing value of material containing more than 3 % P2O5. Fore a more accurate agronomic assessment of products containing more than 3 % P2O5 the liming efficiency is determined according to EN 14984.
Kalkdünger - Bestimmung des Neutralisationswertes - Titrimetrische Verfahren
Amendements minéraux basiques - Détermination de la valeur neutralisante - Méthodes par titrimétrie
Sredstva za apnjenje - Določevanje nevtralizacijske vrednosti - Titrimetrijske metode
General Information
- Status
- Not Published
- Public Enquiry End Date
- 09-Mar-2015
- Technical Committee
- KAT - Soil quality
- Current Stage
- 98 - Abandoned project (Adopted Project)
- Start Date
- 07-Nov-2016
- Due Date
- 12-Nov-2016
- Completion Date
- 07-Nov-2016
Relations
- Consolidated By
SIST EN 12945:2014+A1:2016 - Liming materials - Determination of neutralizing value - Titrimetric methods - Effective Date
- 01-Dec-2016
- Revised
SIST EN 12945:2014 - Liming materials - Determination of neutralizing value - Titrimetric methods - Effective Date
- 01-Feb-2015
Overview
EN 12945:2014/FprA1 (CEN) specifies two titrimetric methods for determination of the neutralizing value (NV) of liming materials. The amendment clarifies calculation and reporting, adds conversion tables between CaO and OH equivalents, and updates formulae used to convert titration results into NV. Method A is applicable to all liming materials except silicate types; Method B is applicable to all liming materials. Both methods have limitations for materials containing more than 3% P2O5 - for agronomic assessment of such products the liming efficiency should be determined according to EN 14984.
Key topics and technical requirements
- Two titrimetric procedures: Method A (general, excluding silicate liming materials) and Method B (universally applicable).
- Titration reagents and measurements: NV is calculated from hydrochloric acid and sodium hydroxide titration volumes, molarity and standardization factors (as specified in the standard).
- Calculation formula: Amendment modifies the NV calculation to include conversion factor C (C = 0.028 for expression as CaO; C = 0.017 for expression as OH equivalents) and defines symbols for molarity (M), volumes (V), factors (f), aliquot factors (A) and sample mass (m).
- Results reporting: NV must be reported as equivalents, e.g. “xx (eq CaO)” and/or “yy (eq OH)”.
- Conversion tables: Annex B provides conversion tables and the conversion factor between CaO and OH equivalents (conversion factor ≈ 0.60656).
- Limitations: Methods A and B do not properly account for potential neutralizing contributions when P2O5 > 3%; EN 14984 is recommended for such cases.
Applications
- Quality control and specification testing of liming materials and agricultural lime products.
- Routine laboratory titrations in fertilizer and liming material testing labs.
- Supporting product labelling, compliance with national/regional fertilizer rules, and agronomic recommendations for soil pH management.
- Useful for manufacturers, independent testing laboratories, regulatory bodies, soil scientists and agronomists verifying neutralizing capacity expressed as CaO or OH equivalents.
Related standards
- EN 12945:2014 (base standard) and this prA1 amendment (calculation and annex updates).
- EN 14984 - recommended for determining liming efficiency and agronomic assessment for products with >3% P2O5.
Keywords: EN 12945:2014/FprA1, liming materials, neutralizing value, titrimetric methods, CaO equivalents, OH equivalents, liming efficiency, fertilizer testing, CEN.
Frequently Asked Questions
SIST EN 12945:2014/kprA1:2016 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Liming materials - Determination of neutralizing value - Titrimetric methods". This standard covers: This document specifies two methods for the determination of the neutralizing value (NV) of liming materials. Method A is applicable to all liming materials except silicate liming materials. Method B is applicable to all liming materials. Both methods do not correctly take into account the potential neutralizing value of material containing more than 3 % P2O5. Fore a more accurate agronomic assessment of products containing more than 3 % P2O5 the liming efficiency is determined according to EN 14984.
This document specifies two methods for the determination of the neutralizing value (NV) of liming materials. Method A is applicable to all liming materials except silicate liming materials. Method B is applicable to all liming materials. Both methods do not correctly take into account the potential neutralizing value of material containing more than 3 % P2O5. Fore a more accurate agronomic assessment of products containing more than 3 % P2O5 the liming efficiency is determined according to EN 14984.
SIST EN 12945:2014/kprA1:2016 is classified under the following ICS (International Classification for Standards) categories: 65.080 - Fertilizers. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 12945:2014/kprA1:2016 has the following relationships with other standards: It is inter standard links to SIST EN 12945:2014+A1:2016, SIST EN 12945:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 12945:2014/kprA1:2016 is associated with the following European legislation: EU Directives/Regulations: 2003/2003, 2019/1009. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN 12945:2014/kprA1:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 12945:2014/oprA1:2015
01-februar-2015
6UHGVWYD]DDSQMHQMH'RORþHYDQMHQHYWUDOL]DFLMVNHYUHGQRVWL7LWULPHWULMVNH
PHWRGH
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.
SIST EN 12945:2014/oprA1:2015
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.
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
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 submitt
...
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