PREN 15443 : DRAFT 2009

1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Principles of correct sample preparation
6 Apparatus
    6.1 Apparatus for sample division
        6.1.1 Riffle boxes
        6.1.2 Rotary sample dividers
        6.1.3 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 Shredder
    6.3 Sieves
    6.4 Balance
7 Sample preparation procedure
    7.1 General structure
    7.2 Step 1: Collection of the relevant information of
        the material to be sampled
    7.3 Step 2: Making a sample preparation plan
        7.3.1 General
        7.3.2 Retaining the minimum (sub-)sample size
    7.4 Step 3: Performing the sample preparation plan
8 Methods for sample division
9 Methods for reducing laboratory samples to sub-samples
    and general analysis samples
    9.1 General
    9.2 Initial sample division
    9.3 Initial mass determination
    9.4 Pre-drying
    9.5 Coarse cutting (particle size reduction to < 30 mm)
    9.6 Sample division of < 30 mm material
    9.7 Particle size reduction of < 30 mm material to < 1 mm
    9.8 Sample division of < 1 mm material
    9.9 Particle size reduction of < 1 mm material to < 0,25 mm
10 Storage and labelling of sub-samples
11 Test report
12 Precision
Annex A (normative) - Determination of the changing shape
        factor
    A.1 Introduction
    A.2 Principle
    A.3 Procedure
Annex B (normative) - Determination of the shape factor
    B.1 Introduction
    B.2 Principle
    B.3 Procedure
Annex C (informative) - Examples of sample preparation
    C.1 Introduction
    C.2 Example 1 pellets
    C.3 Example 2 fluff
        C.3.1 General
    C.4 Large pieces SRF - Size-reduction and sub-population
        separation of field samples
Annex D (informative) - Determination of the shape factor
    D.1 Introduction
    D.2 Scope
    D.3 Trueness
    D.4 Repeatability and reproducibility
    D.5 Robustness
Bibliography

Explains methods for reducing combined samples to laboratory samples and laboratory samples to sub-samples and general analysis samples, and is applicable to solid recovered fuels that are either: - fine and regularly-shaped particulate materials, particle sizes up to about 10 mm that can be sampled using a scoop or pipe, for example: soft and hard pellets; - coarse or irregularly-shaped particulate materials, particle sizes up to about 200 mm that can be sampled using a shovel, for example: fluff, chips and chunks; - large pieces with nominal top size above 200 mm.