BS ISO 13909-7:2016
$198.66
Hard coal and coke. Mechanical sampling – Methods for determining the precision of sampling, sample preparation and testing
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 54 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions 4 General |
| 10 | 5 Formulae relating to factors affecting precision 5.1 General |
| 11 | 5.2 Sampling |
| 12 | 6 Estimation of primary increment variance 6.1 Direct determination of individual primary increments |
| 13 | 6.2 Determination using the estimate of precision 7 Methods for estimating precision 7.1 General 7.2 Duplicate sampling with twice the number of increments |
| 16 | 7.3 Duplicate sampling during routine sampling |
| 17 | 7.4 Alternatives to duplicate sampling 7.5 Precision adjustment procedure |
| 18 | 8 Calculation of precision 8.1 Replicate sampling |
| 19 | 8.2 Normal sampling scheme |
| 20 | 9 Methods of checking sample preparation and testing errors 9.1 General 9.2 Target value for variance of sample preparation and analysis 9.2.1 General |
| 21 | 9.2.2 Off-line preparation 9.2.3 On-line preparation 9.3 Checking procedure as a whole |
| 22 | 9.4 Checking stages separately 9.4.1 General |
| 23 | 9.4.2 Procedure 1 |
| 26 | 9.4.3 Procedure 2 |
| 29 | 9.4.4 Interpretation of results |
| 30 | 9.5 Procedure for obtaining two samples at each stage 9.5.1 With a riffle 9.5.2 With a mechanical sample divider 9.6 Example |
| 34 | Annex A (informative) Variogram method for determining variance |
| 42 | Annex B (informative) Grubbs’ estimators method for determining sampling precision |
| 51 | Bibliography |
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BS ISO 13909-7:2016 – TC:2020 Edition
Tracked Changes. Hard coal and coke. Mechanical sampling – Methods for determining the precision of…
