EN ISO 18134-2:2024
(Main)Solid biofuels - Determination of moisture content - Part 2: Simplified method (ISO 18134‑2:2024)
General Information
- Abstract
This document specifies a method of determining the moisture content of a test sample of solid biofuels by drying in an oven and is used when the highest precision is not needed, e.g. for routine production control on site. The method described in this document is applicable to all solid biofuels. The moisture content of solid biofuels (as received) is always reported based on the total mass of the test sample (wet basis).
NOTE Biomass materials can contain small amounts of volatile organic compounds (VOC) which can evaporate when determining moisture content by oven drying (see References [1] and [2]). The release of such compounds is quite small relative to the overall moisture content as determined by this method and is disregarded in this document.
- Status
- Published
- Publication Date
- 02-Apr-2024
- Technical Committee
- CEN/TC 335 - Solid biofuels
- Drafting Committee
- CEN/TC 335 - Solid biofuels
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 03-Apr-2024
- Completion Date
- 03-Apr-2024
Overview
EN ISO 18134-2:2024 - Solid biofuels - Determination of moisture content - Part 2: Simplified method (ISO 18134‑2:2024) specifies a pragmatic oven-drying procedure for routine determination of moisture in all types of solid biofuels. Intended for on‑site production control where the highest laboratory precision is not required, the method reports moisture on a wet basis (as received) and disregards small volatile organic compound (VOC) losses as negligible.
Key topics and requirements
- Principle: Dry a test portion in air at (105 ± 2) °C until constant mass; calculate moisture from mass loss.
- Simplified approach: Buoyancy corrections are neglected and only a single determination is required (difference from ISO 18134‑1).
- Constant mass criterion: Change not exceeding 0.2 % absolute between successive weighings.
- Apparatus: Ventilated drying oven with uniform temperature; non‑corrodible heat‑resistant trays; balance readable to 0.1 g.
- Sample preparation: Follow ISO 18135 / ISO 21945 for sampling and ISO 14780 for sample reduction. Prepare particles so at least one dimension is < 31.5 mm.
- Handling warnings: Biofuels readily gain or lose moisture; avoid moisture changes during reduction and transfer. High‑moisture samples should be pre‑dried per ISO 14780 and calculated back to original wet basis using the formula in clause 8.3.
- Test portion mass: Minimum 300 g (or 100 g for fine particulate materials such as sawdust or fuel powder).
- Layering guidance: Spread material in an even, thin layer; for small particle samples, the layer should not exceed 1 g of material per 1 cm of surface area.
Applications and users
- Who uses it: Biofuel producers, pellet manufacturers, quality control laboratories, plant operators, traders and inspectors performing routine on‑site checks.
- Practical uses:
- Routine production control and process monitoring
- Incoming/outgoing goods checks for moisture specification compliance
- Quick moisture screening where full reference precision is unnecessary
- Field laboratories and small‑scale facilities that require robust, repeatable moisture data
- Benefits: Simple, low‑cost equipment, quick turnaround, suitable for a wide range of solid biofuels.
Related standards
- ISO 18134‑1 (reference method - buoyancy corrected)
- ISO 14780 (sample preparation)
- ISO 16559 (vocabulary)
- ISO 18135 (sampling)
- ISO 21945 (simplified sampling for small‑scale applications)
Keywords: EN ISO 18134-2:2024, solid biofuels moisture content, simplified oven drying method, moisture determination, wet basis, biofuel quality control.
Relations
- Effective Date
- 16-Nov-2022
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Referred By
EN 15296:2011 - Solid biofuels - Conversion of analytical results from one basis to another - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN ISO 18134-2:2024 is a standard published by the European Committee for Standardization (CEN). Its full title is "Solid biofuels - Determination of moisture content - Part 2: Simplified method (ISO 18134‑2:2024)". This standard covers: This document specifies a method of determining the moisture content of a test sample of solid biofuels by drying in an oven and is used when the highest precision is not needed, e.g. for routine production control on site. The method described in this document is applicable to all solid biofuels. The moisture content of solid biofuels (as received) is always reported based on the total mass of the test sample (wet basis). NOTE Biomass materials can contain small amounts of volatile organic compounds (VOC) which can evaporate when determining moisture content by oven drying (see References [1] and [2]). The release of such compounds is quite small relative to the overall moisture content as determined by this method and is disregarded in this document.
This document specifies a method of determining the moisture content of a test sample of solid biofuels by drying in an oven and is used when the highest precision is not needed, e.g. for routine production control on site. The method described in this document is applicable to all solid biofuels. The moisture content of solid biofuels (as received) is always reported based on the total mass of the test sample (wet basis). NOTE Biomass materials can contain small amounts of volatile organic compounds (VOC) which can evaporate when determining moisture content by oven drying (see References [1] and [2]). The release of such compounds is quite small relative to the overall moisture content as determined by this method and is disregarded in this document.
EN ISO 18134-2:2024 is classified under the following ICS (International Classification for Standards) categories: 27.190 - Biological sources and alternative sources of energy; 75.160.40 - Biofuels. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 18134-2:2024 has the following relationships with other standards: It is inter standard links to EN ISO 18134-2:2017, ISO 16559:2022, ISO 21945:2020, ISO 18135:2017, ISO 14780:2017, EN 13852-1:2025, EN ISO 4037-4:2021, EN 15210-1:2009, EN 16126:2012, EN 15296:2011, EN 14961-4:2011, CEN/TS 15149-3:2006, EN 14780:2011, CEN/TR 15149-3:2014, EN 15150:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 18134-2:2024 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2024
Nadomešča:
SIST EN ISO 18134-2:2017
Trdna biogoriva - Določanje vlage - 2. del: Poenostavljena metoda (ISO 18134-
2:2024)
Solid biofuels - Determination of moisture content - Part 2: Simplified method (ISO 18134
-2:2024)
Biogene Festbrennstoffe - Bestimmung des Wassergehaltes - Teil 2: Gesamtgehalt an
Wasser - Vereinfachtes Verfahren (ISO 18134-2:2024)
Biocombustibles solides - Dosage de la teneur en humidité - Partie 2: Méthode simplifiée
(ISO 18134-2:2024)
Ta slovenski standard je istoveten z: EN ISO 18134-2:2024
ICS:
75.160.40 Biogoriva Biofuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 18134-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2024
EUROPÄISCHE NORM
ICS 27.190; 75.160.40 Supersedes EN ISO 18134-2:2017
English Version
Solid biofuels - Determination of moisture content - Part 2:
Simplified method (ISO 18134-2:2024)
Biocombustibles solides - Dosage de la teneur en Biogene Festbrennstoffe - Bestimmung des
humidité - Partie 2: Méthode simplifiée (ISO 18134- Wassergehaltes - Teil 2: Gesamtgehalt an Wasser -
2:2024) Vereinfachtes Verfahren (ISO 18134-2:2024)
This European Standard was approved by CEN on 22 March 2024.
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 CEN-CENELEC Management Centre 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18134-2:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 18134-2:2024) has been prepared by Technical Committee ISO/TC 238 "Solid
biofuels" in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” the secretariat of
which is held by SIS.
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 October 2024, and conflicting national standards shall
be withdrawn at the latest by October 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 18134-2:2017.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 18134-2:2024 has been approved by CEN as EN ISO 18134-2:2024 without any
modification.
International
Standard
ISO 18134-2
Third edition
Solid biofuels — Determination of
2024-03
moisture content —
Part 2:
Simplified method
Biocombustibles solides — Dosage de la teneur en humidité —
Partie 2: Méthode simplifiée
Reference number
ISO 18134-2:2024(en) © ISO 2024
ISO 18134-2:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
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Published in Switzerland
ii
ISO 18134-2:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Sample preparation . 2
6.1 Sample reduction . .2
6.2 Pre-dried test sample .2
6.3 Mass of test portion . .2
7 Procedure . 2
7.1 Handling of test portion .2
7.2 Drying and weighing of test portion .3
8 Calculation . 3
8.1 General .3
8.2 Moisture content on a wet basis .3
8.3 Moisture content for pre-dried material .3
9 Performance characteristics . 4
10 Test report . 4
Bibliography . 5
iii
ISO 18134-2:2024(en)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
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