Foreword

Introduction

1Scope

2Normative references

3Terms and definitions

4Symbols

5Principles of correct sample reduction

6Apparatus

6.1Apparatus for sample division

6.1.1General

6.1.2Riffle boxes

6.1.3Rotary sample dividers

6.1.4Shovels and scoops

6.2Apparatus for particle size-reduction

6.2.1Coarse cutting mill or wood crusher

6.2.2Cutting mill

6.2.3Axe

6.2.4Hand saw

6.2.5Sieves

6.2.6Balance

7Sample reduction — General principles

8Methods for sample division

8.1General

8.2Riffling

8.3Strip mixing

8.4Long pile-alternate shovel method

8.5Rotary divider

8.6Coning and quartering

8.7Mass reducing straw-like material (handful sampling)

9Method for reducing laboratory samples to sub-samples and general analysis samples

9.1Mixing

9.2Initial sample division

9.3Pre-drying

9.4Coarse cutting (particle size reduction to <31,5 mm)

9.5Sample division of <31,5 mm material

9.6Particle size reduction of <31,5 mm material to <1 mm

9.7Sample division of <1 mm material

9.8Particle size reduction of <1 mm material to <0,25 mm

10Storage and labelling

11Performance characteristics

Annex APrecision in relation to division method (informative)

Annex BScheme of sample preparation for samples from single delivery (informative)

Annex CScheme of sample preparation for samples from continuous delivery (informative)

Bibliography