BS ISO 13909-7:2001:2008 Edition
$189.07
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 | 2008 | 50 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | Hard coal and coke�— Mechanical sampling�— |
| 5 | Contents Page |
| 6 | Foreword |
| 7 | Introduction |
| 9 | Hard coal and coke�— Mechanical sampling�— 1��� Scope 2��� Normative references 3��� Terms and definitions |
| 10 | 4��� General |
| 11 | 5��� Equations relating to factors affecting precision 5.1��� General 5.2��� Continuous sampling |
| 12 | 5.3��� Intermittent sampling 6��� Estimation of primary increment variance 6.1��� Direct determination of individual primary increments |
| 13 | 6.2��� Determination using the estimate of precision |
| 14 | 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 9.4.2.1��� Method 9.4.2.2��� Calculation of variance from individual stages |
| 25 | 9.4.2.3��� Calculation of cumulative variance at each stage |
| 26 | 9.4.3��� Procedure�2 9.4.3.1��� Method 9.4.3.2��� Calculation of variance arising from individual stages |
| 27 | 9.4.3.3��� Calculation of cumulative variance at each stage |
| 28 | 9.4.4��� Interpretation of results |
| 29 | 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 |
| 33 | Variogram method for determining variance A.1��� General |
| 35 | A.2��� Calculation and fitting the variogram A.2.1��� General A.2.2��� Variogram fit by eye A.2.3��� Variogram fit by linear regression A.2.4��� Calculation of corrected variance A.3��� Calculation of sampling variance |
| 36 | A.4��� Calculation of number of increments A.5��� Calculation of total variance A.6��� Example of calculation of sampling and total variance |
| 40 | Grubbs’ estimators method for determining sampling precision B.1��� General B.2��� Selection of sub-lot size for measuring precision B.3��� Selection of number of stopped-belt increments and collection intervals B.4��� Off-line preparation and analysis of test samples |
| 43 | B.5��� Estimation of the variance of preparation and testing of system samples |
| 44 | B.6��� Calculation of sub-lot measurement variances for the sampling system and stopped- belt ref… |
| 46 | B.7��� Calculation of the overall precision of sampling, off-line preparation, and analysis |
| 47 | B.8��� Examination of the significance of the estimate of precision |
| 48 | Bibliography |
