AS 2884.2-1993

1 - AS 2884.2-1993 HEAVY MINERAL SAND CONCENTRATES - SAMPLING - SAMPLING FROM STATIONARY SITUATIONS
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE
5 - 2 REFERENCED DOCUMENTS
5 - 3 DEFINITIONS
5 - 3.1 Bias
5 - 3.2 Coefficient of variation
5 - 3.3 Constant-mass division
5 - 3.4 Divided increment
5 - 3.5 Division
5 - 3.6 Duplicate sampling
5 - 3.7 Fixed-rate division
6 - 3.8 Gross sample
6 - 3.9 Increment
6 - 3.10 Lot
6 - 3.11 Manual sampling
6 - 3.12 Mass-basis sampling
6 - 3.13 Mechanical sampling
6 - 3.14 Nominal top size
6 - 3.15 Partial sample
6 - 3.16 Quality variation
6 - 3.17 Replicate sampling
6 - 3.18 Sampling unit
6 - 3.19 Standard deviation
6 - 3.20 Strata
6 - 3.21 Stratified random sampling
6 - 3.22 Systematic sampling
6 - 3.23 Time-basis sampling
6 - 3.24 Variance
6 - 4 PRINCIPLES OF SAMPLING
6 - 4.1 General
7 - 4.2 Sampling errors
8 - 4.3 Sampling variance
10 - 4.4 Overall variance
11 - 5 ESTABLISHING A SAMPLING SCHEME
12 - 6 MASS OF INCREMENT
13 - 7 NUMBER OF INCREMENTS AND SAMPLING UNITS
13 - 7.1 General
13 - 7.2 Calculation of number of increments
15 - 8 MASS OF GROSS SAMPLES AND PARTIAL SAMPLES
15 - 8.1 General
15 - 8.2 Minimum mass of gross samples
16 - 8.3 Minimum mass of partial samples
16 - 8.4 Minimum mass of crushed gross samples and partial samples
16 - 9 SAMPLING LARGE QUANTITIES OF CONCENTRATE
16 - 9.1 General
16 - 9.2 Uniformity of primary increment mass
16 - 9.3 Bias testing
17 - 9.4 Safety of operators
17 - 9.5 Sampling implements
17 - 9.6 Sampling from stockpiles
18 - 9.7 Sampling from wagons or trucks
18 - 9.8 Sampling from ships’ holds
18 - 10 SAMPLING CONCENTRATES IN PACKED FORM
19 - 11 STOPPED-BELT SAMPLING
20 - 12 PACKING AND MARKING OF SAMPLE
21 - APPENDIX A - SAMPLING IMPLEMENTS
21 - A1 SCOPE
21 - A2 SAMPLING FRAME
21 - A3 SCOOPS
22 - A4 AUGER
23 - A5 DRILL
24 - A6 SPEAR

Sets out methods for the sampling of heavy mineral sand concentrates from stationary situations, to provide samples for chemical analysis, physical testing and determination of moisture.

This Standard sets out methods for the sampling of heavy mineral sands from stationary situations to provide samples for chemical analysis, physical testing and determination of moisture. Stopped-belt sampling is specifically included. The methods of sampling outlined in this Standard should be considered only where the preferred method of sampling from a moving stream is not possible. The preparation of samples taken by methods outlined in this Standard is covered in AS 2884.3. Clauses 4 to 8 provide general sampling theory that may not be relevant to sampling from stationary situations.

First published as AS 2884.2-1993.