BS ISO 13909-7:2016 – TC:2020 Edition
$258.95
Tracked Changes. 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 | 2020 | 114 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 66 | Foreword |
| 67 | Introduction |
| 69 | 1 Scope 2 Normative references 3 Terms and definitions 4 General |
| 70 | 5 Formulae relating to factors affecting precision 5.1 General |
| 71 | 5.2 Sampling |
| 72 | 6 Estimation of primary increment variance 6.1 Direct determination of individual primary increments |
| 73 | 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 |
| 76 | 7.3 Duplicate sampling during routine sampling |
| 77 | 7.4 Alternatives to duplicate sampling 7.5 Precision adjustment procedure |
| 78 | 8 Calculation of precision 8.1 Replicate sampling |
| 79 | 8.2 Normal sampling scheme |
| 80 | 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 |
| 81 | 9.2.2 Off-line preparation 9.2.3 On-line preparation 9.3 Checking procedure as a whole |
| 82 | 9.4 Checking stages separately 9.4.1 General |
| 83 | 9.4.2 Procedure 1 |
| 86 | 9.4.3 Procedure 2 |
| 89 | 9.4.4 Interpretation of results |
| 90 | 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 |
| 94 | Annex A (informative) Variogram method for determining variance |
| 102 | Annex B (informative) Grubbs’ estimators method for determining sampling precision |
| 111 | Bibliography |
