BS 5660-2:1987

National foreword
Committees responsible
Method
1 Scope
2 Field of application
3 References
4 Definitions
5 General procedure for sampling and sample
     preparation
6 Fundamentals of sampling
7 Method of sampling
8 Method of sample preparation
9 Packing and marking of sample
10 Requirements for mechanical systems
11 Installation for mechanical systems
Annexes
A Equation for number of increments
B Procedure for determining the minimum mass of
     divided gross sample for size determination using
     other mechanical division methods (for example
     mechanical riffle divider)
C Alternative method of taking the reference sample
D Design criteria of primary sampler for avoiding
     bias in taking increments
Tables
1 Overall precision, beta SDM (%)
2 Mass of increment
3 Classification of quality variation, sigma w
4 Minimum number of increments required, n1, and
     sampling precision, beta s
5 Minimum number of parts per consignment for
     moisture determination
6 Examples of minimum mass of divided size gross
     sample in other mechanical division methods (for
     example mechanically charged riffle divider) and
     division precision, beta DM
7 Examples of minimum mass of divided increment or
     subsample for size determination in other
     mechanical division methods (for example
     mechanically charged riffle divider)
8 Minimum mass of divided gross sample for moisture
     determination and/or chemical analysis for other
     mechanical division methods (for example
     mechanically charged riffle divider)
9 Minimum mass of divided individual increment of
     subsample for moisture determination and/or
     chemical analysis for other mechanical division
     methods (for example mechanically charged riffle
     divider)
10 Number of test portions for moisture determination
11 Value of sigma w
Figures
1 The precision of sampling for each mass of
     consignment
2 Minimum number of increments required
3 An example for constitution of subsample and a
     gross sample
4 Sample preparation for chemical analysis
5 An example of sample preparation
6 Examples of diagrammatic illustration for cutter-
     type primary samplers
7a) Example of slotted belt type divider
7b) Example of chain bucket type divider
7c) Example of rotary cutter-chute type divider
7d) Example of rotary container type divider
7e) Example of rotary cone type divider
7f) Example of rotary plate type divider
7g) Example of mechanically charged riffle type divider
8 Example of flowsheet for installation
9 Scheme 1
10 Scheme 2
11 Scheme 3
12 Scheme 4