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Foreword 5 Introduction 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Precision of sample preparation 7 5 Constitution of a sample 8 5.1 Introduction 8 5.2 Combination of increments 8 5.2.1 Time-basis sampling 8 5.2.2 Mass-basis sampling 8 5.3 Combination of samples 9 6 Division 9 6.1 General 9 6.2 Mechanical methods 16 6.2.1 General 16 6.2.2 Mass of cut 16 6.2.3 Interval between cuts 16 6.2.4 Division of individual increments 16 6.2.5 Division of samples 19 6.3 Manual methods 20 6.3.1 Riffle method 20 6.3.2 Flattened-heap method 21 6.3.3 Strip-mixing and splitting method 23 7 Reduction 24 7.1 General 24 7.2 Reduction mills 24 8 Mixing 24 9 Air-drying 24 10 Preparation of samples for specific tests 25 10.1 Types of test samples 25 10.2 Preparation of samples for determination of total moisture only 25 10.2.1 General 25 10.2.2 Storage 27 10.2.3 Sample reduction 27 10.2.4 Sample division 28 10.3 Preparation of samples for general analysis only 28 10.3.1 General 28 10.3.2 Air-drying 28 10.3.3 Reduction and division 28 10.4 Common samples 29 10.4.1 General 29 10.4.2 Extraction of moisture sample by mechanical division 30 10.4.3 Extraction of moisture sample by manual

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ISO

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reference