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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Sisällysluettelo
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
6.2 Apparatus for particle size-reduction
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 Precision in relation to division method (informative)
Annex B Scheme of sample preparation for samples from single delivery (informative)
Annex C Scheme of sample preparation for samples from continuous delivery (informative)
ISO 16559:2014 Solid biofuels -- Terminology, definitions and descriptions
ISO 18134-1:2015 Solid biofuels -- Determination of moisture content -- Oven dry method -- Part 1: Total moisture -- Reference method
ISO 18134-2:2017 Solid biofuels -- Determination of moisture content -- Oven dry method -- Part 2: Total moisture -- Simplified method
ISO 16559:2014 Solid biofuels -- Terminology, definitions and descriptions
ISO 18134-1:2015 Solid biofuels -- Determination of moisture content -- Oven dry method -- Part 1: Total moisture -- Reference method
ISO 18134-2:2017 Solid biofuels -- Determination of moisture content -- Oven dry method -- Part 2: Total moisture -- Simplified method
ISO 18135:2017 Solid Biofuels -- Sampling
ISO 3310-1:2016 Test sieves -- Technical requirements and testing -- Part 1: Test sieves of metal wire cloth