AS ISO 11794:2022 identically adopts ISO 11794:2017, which sets out the basic methods for sampling particulate material that is mixed with a liquid, usually water, to form a slurry.
Table of contents
9 Time-basis sampling
9.1 General
9.2 Sampling interval
9.3 Cutters
9.4 Taking of increments
9.5 Constitution of lot or sub-lot samples
9.6 Division of increments and sub-lot samples
9.7 Division of lot samples
9.8 Number of cuts for division
Header
10 Stratified random sampling within fixed time intervals
About this publication
11 Mechanical sampling from moving streams
11.1 General
11.2 Design of the sampling system
11.2.1 Safety of operators
11.2.2 Location of sample cutters
11.2.3 Provision for duplicate sampling
11.2.4 System for checking the precision and bias
11.2.5 Avoiding bias
11.3 Slurry sample cutters
11.3.1 General
11.3.2 Falling-stream cutters
11.3.3 Cutter velocities
11.4 Mass of solids in increments
11.5 Number of primary increments
11.6 Routine checking
Preface
12 Manual sampling from moving streams
12.1 General
12.2 Choosing the sampling location
12.3 Sampling implements
12.4 Mass of solids in increments
12.5 Number of primary increments
12.6 Sampling procedures
Foreword
13 Sampling of stationary slurries
1 Scope
14 Sample preparation
14.1 General
14.2 Sample division
14.3 Sample grinding
14.4 Chemical analysis samples
14.5 Physical test samples
2 Normative references
15 Packing and marking of samples
3 Terms and definitions
Annex A
A.1 Components of sampling error and sampling variance
A.2 Estimation of fundamental variance
A.3 Segregation and grouping variance
A.4 Long-range quality-fluctuation variance
A.5 Practical estimation of total variance
4 Principles of sampling slurries
4.1 General
4.2 Sampling errors
4.2.1 General
4.2.2 Preparation error, PE
4.2.3 Delimitation and extraction errors, DE and EE
4.2.4 Weighting error, WE
4.2.5 Periodic quality-fluctuation error, QE3
4.3 Sampling and total variance
4.3.1 Sampling variance
4.3.2 Total variance
4.3.3 Sampling-stage method of estimating sampling and total variance
4.3.4 Simplified method of estimating sampling and total variance
4.3.5 Interleaved sample method of measuring total variance
Annex B
5 Establishing a sampling scheme
Annex C
6 Minimization of bias and unbiased increment mass
6.1 Minimization of bias
6.2 Volume of increment for falling-stream samplers to avoid bias
Annex D
7 Number of increments
7.1 General
7.2 Simplified method
Bibliography
8 Minimum mass of solids contained in lot and sub-lot samples
8.1 Minimum mass of solids in lot samples
8.2 Minimum mass of solids in sub-lot samples
8.3 Minimum mass of solids in lot and sub-lot samples after size reduction
