BS 5661:1987

National foreword
Committees responsible
Method
1 Scope
2 Field of application
3 References
4 Definitions
5 General procedures for sample preparation
6 Fundamentals of sample preparation
7 Apparatus
8 Combining increments for sample preparation
9 Manual method of division
10 Preparation of test samples
11 Packing and marking of sample
Annexes
A Type of riffle divider
B Procedure for determining the minimum mass of
    divided size sample by manual riffle division method
Tables
1 Application of manual division method
2 Whole-through sieve size of sample and minimum mass
    of each increment
3 Number of increments to be taken by manual increment
    division method
4 Whole-through sieve size and thickness of spread
    sample and scoop for increment division
5 Whole-through sieve size of sample and size of
    riffle divider
6 Minimum mass of divided gross sample for moisture
    determination and/or chemical analysis by manual
    riffle division method
7 Minimum mass of divided individual increment or
    subsample for moisture determination and/or chemical
    analysis by manual riffle division method
8 Minimum mass of divided size gross sample by manual
    riffle division method and precision of sample
    preparation
9 Number of test portions per test sample
10 Minimum number of subsamples per consignment for
    moisture determination
11 Dimensions of riffle divider
Figures
1 Scoop for increment division and its dimensions
2 Example of manual increment division method for
    gross sample
3 Preparation for test samples for chemical analysis
4 Example of sample preparation
5 Example of riffle divider

Sets out underlying theory, the basic principles and requirements for the devices and their operation for the manual method of preparation of samples taken from a consignment of iron ore to ISO 3081 or ISO 3082, to evaluate the quality of the consignment.