BS 5243:1975

Cooperating organizations
Foreword
Principles
0. Introduction
1. Scope and field of application
2. References
3. Definitions
4. Principles for effective sampling
5. Methods of sampling
6. Validation of sampling effectiveness
Appendices
A. Guides for sampling from ducts and stacks
B. Particle deposition in sampling lines
C. Errors due to anisokinetic sampling
D. Bibliographical references
Tables
1. Collection efficiency and flow resistance of
    selected air sampling filter media
2. Minimum number of sampling points
3. Number of sample withdrawal points
4. Length of horizontal tube for 100% and 50%
    deposition due to gravity
5. Length of tube within which 20%, 50% and 75% of
    particles will deposit
6. Fraction of entering particles which deposit in
    a vertical sampling line
7. Fraction of entering particles deposited in a
    1.01 cm internal diameter 90 deg bend in aluminium
    tubing
8. Ratio of observed to actual concentration of
    particles when sampled at various fractions and
    multiples of isokinetic flow
Figures
1. Velocity ratio V as a function of Reynolds number
    Re for smooth pipes
2. Single circular probe sampler
3. Rectangular slot probe sampler
4. Single probe retrievable filter

For obtaining representative samples. Prescribes acceptable methods and materials for gas and particle sampling. Excludes radiochemical measurement and evaluation.