EN 14412:2004

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Operating principles
   5.1 Principle of diffusive sampling
   5.2 Dimensions of diffusive uptake rate
   5.3 Bias due to the selection of a non-ideal sorbent
   5.4 Environmental factors affecting sampler performance
6 Measurement objectives
   6.1 General
   6.2 Identification of causes of complaints about poor indoor
        air quality
   6.3 Determination of reference values for indoor air quality
   6.4 Compliance with limit or guideline values for indoor air
   6.5 Identification of indoor pollutant sources
   6.6 Testing of effectiveness of remedial action
   6.7 Analysis of trends in indoor air quality
   6.8 Assessment of concentrations in indoor air at abnormal or
        "worst-case" conditions
   6.9 Personal monitoring
   6.10 Validation of indoor pollution models
   6.11 Measurement of mean ventilation rates
   6.12 Aim of quality control with parallel measurements involving
        different methods
7 Measurements
   7.1 General
   7.2 Elements of sampling strategy
   7.3 Measurement strategy with respect to defined measurement
       objectives
8 Selection of a sampling method
   8.1 Sources of information on the maintenance of diffusive
       samplers
   8.2 Selection of a sampler
9 Requirements for training
10 Quality assurance and quality control
Annex A (informative) Types of diffusive samplers
Annex B (informative) Limit values/Guideline values
Annex C (informative) Calculation of diffusion coefficients and
                      uptake rates
      C.1 Calculation of diffusion coefficients
      C.2 Simple method to calculate uptake rates
      C.3 Literature on values of diffusive coefficients
Annex D (informative) Characteristics of some diffusive samplers
Bibliography

This document gives guidelines for the selection, use and maintenance of diffusive samplers used to analyse gaseous pollutants in indoor air including measurement strategy and planning.This document gives guidelines for the selection, use and maintenance of diffusive samplers used to measure indoor air quality and personal exposure. This document is applicable to indoor air quality assessment because crucial differences to ambient air measurement have to be taken into account concerning environmental parameters, measurement strategy, as well as the nature, number, source and abundance of indoor air pollutants.In contrast to typical ambient air measurements the appearance of unexpected compounds in indoor air environments is quite common. Procedures to calculate specific uptake rates of these compounds are needed more often as there is only a limited number of uptake rates validated by experiments (see EN 13528-2 and EN 13528-3) to assess the respective concentration values. In addition to the general calculation procedure of the individual uptake rate as given in EN 13528-2 and EN 13528 3 detailed procedures to calculate diffusion coefficients and the uptake rate are given in annex C of this document.