BS ISO 15767:2009

Foreword
Introduction
1 Scope
2 Terms and definitions
3 Weight instability - Causes and minimization
  3.1 General
  3.2 Moisture sorption
  3.3 Electrostatic effects
  3.4 Effects of volatile compounds (other than water)
  3.5 Handling damage
  3.6 Buoyancy changes
4 Correcting for weight instability by use of blanks
  4.1 General
  4.2 Minimum number of blanks
  4.3 Weighing times and sequence
  4.4 Conditioning times
  4.5 Storage stability
5 Transport of collection substrates with collected aerosol
  samples to laboratory
  5.1 General
  5.2 Recommended packaging
6 Weighing equipment and procedure
  6.1 The balance
  6.2 Recommended environmental controls
  6.3 Other equipment requirements
  6.4 Procedure
7 Recommendations for the reporting of measured mass
  relative to LOD and LOQ
8 Estimation of the uncertainty of the analytical procedure
  of weighing aerosol collection substrates
  8.1 Introduction
  8.2 Within-laboratory estimated standard deviation s[w]
      obtained over an extended period
9 Measures to assure the validity of previously determined
  measurement uncertainty
  9.1 Continued determination of within-laboratory
      reproducibility
  9.2 Participation in laboratory performance proficiency
      testing
  9.3 Laboratory self-check on weighing uncertainty
Annex A (normative) - Uncertainty component in weighing
        collected aerosol
Annex B (informative) - Interpretation of LOD and LOQ
Annex C (informative) - Method evaluation example
Annex D (normative) - Test of transportation integrity
Annex E (informative) - Check on weighing uncertainty
Annex F (informative) - Balance uncertainty
Bibliography

Defines recommendations for controlling the analytical uncertainty associated with aerosol collection medium instability, where collection medium or collection substrate includes any article used to collect particles (e.g. filter or foam material) as well as those supporting elements which must be analysed by weighing.

This International Standard provides recommendations for controlling the analytical uncertainty associated with aerosol collection medium instability, where collection medium or collection substrate includes any article used to collect particles (e.g. filter or foam material) as well as those supporting elements which must be analysed by weighing.

This International Standard is applicable to results compiled both from the literature and, if necessary and feasible, through laboratory experiment. Expected uncertainty associated with given aerosol capture methods is quantified where possible. Recommendations as to materials to be used are given. Means of minimizing uncertainty arising from instability are provided. Recommendations for the weighing procedure are given. A procedure for estimating weighing uncertainty is described. Finally, recommendations are given for the reporting of measured mass, including an uncertainty component and limits of detection and quantification.