ISO 14780:2017
Solid biofuels — Sample preparation
ISO 14780:2017 defines methods for reducing combined samples (or increments) to laboratory samples and laboratory samples to sub-samples and general analysis samples and is applicable to solid biofuels.
The methods defined in this document can be used for sample preparation, for example, when the samples are to be tested for calorific value, moisture content, ash content, bulk density, durability, particle size distribution, ash melting behaviour, chemical composition, and impurities.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principles of correct sample reduction
6 Apparatus
6.1 Apparatus for sample division
6.1.1 General
6.1.2 Riffle boxes
6.1.3 Rotary sample dividers
6.1.4 Shovels and scoops
6.2 Apparatus for particle size-reduction
6.2.1 Coarse cutting mill or wood crusher
6.2.2 Cutting mill
6.2.3 Axe
6.2.4 Hand saw
6.2.5 Sieves
6.2.6 Balance
7 Sample reduction — General principles
8 Methods for sample division
8.1 General
8.2 Riffling
8.3 Strip mixing
8.4 Long pile-alternate shovel method
8.5 Rotary divider
8.6 Coning and quartering
8.7 Mass reducing straw-like material (handful sampling)
9 Method for reducing laboratory samples to sub-samples and general analysis samples
9.1 Mixing
9.2 Initial sample division
9.3 Pre-drying
9.4 Coarse cutting (particle size reduction to 31,5 mm)
9.5 Sample division of 31,5 mm material
9.6 Particle size reduction of 31,5 mm material to 1 mm
9.7 Sample division of 1 mm material
9.8 Particle size reduction of 1 mm material to 0,25 mm
10 Storage and labelling
11 Performance characteristics
Annex A (informative) Precision in relation to division method
Annex B (informative) Scheme of sample preparation for samples from single delivery
Annex C (informative) Scheme of sample preparation for samples from continuous delivery
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principles of correct sample reduction
6 Apparatus
6.1 Apparatus for sample division
6.1.1 General
6.1.2 Riffle boxes
6.1.3 Rotary sample dividers
6.1.4 Shovels and scoops
6.2 Apparatus for particle size-reduction
6.2.1 Coarse cutting mill or wood crusher
6.2.2 Cutting mill
6.2.3 Axe
6.2.4 Hand saw
6.2.5 Sieves
6.2.6 Balance
7 Sample reduction — General principles
8 Methods for sample division
8.1 General
8.2 Riffling
8.3 Strip mixing
8.4 Long pile-alternate shovel method
8.5 Rotary divider
8.6 Coning and quartering
8.7 Mass reducing straw-like material (handful sampling)
9 Method for reducing laboratory samples to sub-samples and general analysis samples
9.1 Mixing
9.2 Initial sample division
9.3 Pre-drying
9.4 Coarse cutting (particle size reduction to 31,5 mm)
9.5 Sample division of 31,5 mm material
9.6 Particle size reduction of 31,5 mm material to 1 mm
9.7 Sample division of 1 mm material
9.8 Particle size reduction of 1 mm material to 0,25 mm
10 Storage and labelling
11 Performance characteristics
Annex A (informative) Precision in relation to division method
Annex B (informative) Scheme of sample preparation for samples from single delivery
Annex C (informative) Scheme of sample preparation for samples from continuous delivery
Bibliography