SIST EN 14412:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Innenraumluftqualität - Passivsammler zur Bestimmung der Konzentrationen von Gasen und Dämpfen - Anleitung zur Auswahl, Anwendung und HandhabungQualité de l'air intérieur - Echantillonnage par diffusion pour la détermination de la concentration des gaz et des vapeurs - Guide pour la sélection, l'utilisation et la maintenanceIndoor air quality - Diffusive samplers for the determination of concentrations of gases and vapours - Guide for selection, use and maintenance13.040.20Kakovost okoljskega zrakaAmbient atmospheresICS:Ta slovenski standard je istoveten z:EN 14412:2004SIST EN 14412:2004en01-december-2004SIST EN 14412:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14412September 2004ICS 13.040.20 English versionIndoor air quality - Diffusive samplers for the determination ofconcentrations of gases and vapours - Guide for selection, useand maintenanceQualité de l'air intérieur - Echantillonneurs par diffusionpour la détermination de la concentration des gaz et desvapeurs - Guide pour la sélection, l'utilisation et lamaintenanceInnenraumluftqualität - Passivsammler zur Bestimmung derKonzentrationen von Gasen und Dämpfen - Anleitung zurAuswahl, Anwendung und HandhabungThis European Standard was approved by CEN on 9 July 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14412:2004: ESIST EN 14412:2004

Types of diffusive samplers.33 Annex B (informative)
Limit values/Guideline values.36 Annex C (informative)
Calculation of diffusion coefficients and uptake rates.38 C.1 Calculation of diffusion coefficients.38 C.2 Simple method to calculate uptake rates.41 C.3 Literature on values of diffusive coefficients.43 Annex D (informative)
Characteristics of some diffusive samplers.44 Bibliography.46
EN 13528-2:2002, Ambient air quality – Diffusive samplers for the determination of concentrations of gases and vapours – Requirements and test methods – Part 2: Specific requirements and test methods. ISO 16000-1, Indoor air – Part 1: General aspects of sampling strategy. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ambient air outdoor air in the troposphere, excluding indoor air and workplaces [EN 13528-1:2002] 3.2 averaging time period of time for which the measuring procedure yields a single value [EN 13528-1:2002] 3.3 cross-sectional area of the diffusion path cross-sectional area of the space inside the diffusive sampler, which is available for the diffusion process, expressed in square centimetres. This cross-sectional area may be identical to the intake opening SIST EN 14412:2004

3.4 diffusive sampler a device which is capable of taking samples of gases or vapours from the atmosphere at a rate controlled by a physical process such as gaseous diffusion through a static air layer or a porous material and/or permeation through a membrane, but which does not involve the active movement of pumped air through the device [EN 13528-1:2002] NOTE Active normally refers to the pumped movement of air. 3.5 diffusive uptake rate rate at which the diffusive sampler collects a particular gas or vapour from the atmosphere, expressed in cubic centimetres per minute (cm3 min-1) 3.6 indoor air air in indoor environment, i.e. dwellings having living rooms, bedrooms, DIY (do-it-yourself) rooms, recreation rooms and cellars, kitchens and bathrooms; workrooms or work places in buildings which are not subject to health and safety inspections in regard to air pollutants (for example, offices, sales premises); public buildings (for example hospitals, schools, kindergartens, sports halls, libraries, restaurants and bars, theatres, cinemas and other function rooms), and also cabins of vehicles NOTE In some countries workplaces like offices and sales premises are subject to health and safety inspections with regard to air pollutants. 3.7 measuring procedure procedure for sampling and analysing one or more pollutants in air and including storage and transportation of the sample [EN 13528-1:2002] 3.8 personal sampler a device attached to a person that samples air in the breathing zone [EN 689:1995] 3.9 personal
sampling the process of air sampling carried out using a personal sampler [EN 1540:1998] NOTE In the German language the term 'personenbezogene Probenahme' is used for the sampling with a personal sampler as well as with static sampler under the condition that the sample is taken in the breathing zone of the person. 3.10 reference value reference value of a compound in a specified environment, e.g. indoor air, is a statistically determined value (95 percentile per convention) on the basis of a representative study at the time of its assessment. This value is descriptive and has no toxicological significance SIST EN 14412:2004

(1) where m
is the mass (ng); u is the uptake rate (ml/min); t is the time of exposure (min); ρ is the concentration of analyte (µg/m³). 3.12 sorbent medium part of the diffusive sampler which sorbs the analyte to be collected either by a physical process (adsorption, absorption) or by a chemical reaction (chemisorption) 3.13 selectivity degree of independence from interferents 3.14 guideline value recommended concentration which serves as a target and which shall be complied with as much as possible but is not legally binding 3.15 uncertainty (of measurement) parameter, associated with the results of a measurement, that characterises the dispersion of values that could reasonably be attributed to the measurand NOTE 1 The parameter may be, for example, a standard deviation (or given multiple of it), or the half width of an interval having a stated level of confidence. NOTE 2 Uncertainty of measurement comprises, in general, of many components.
Some of these components may be evaluated from the statistical distribution of the results of a series of measurements and can be characterised by experimental standard deviations.
The other components, which can also be characterised by standard deviations, are evaluated from assumed probability distributions based on experience or other information. NOTE 3 It is understood that the result of a measurement is the best estimate of the value of a measurand, and that all components of uncertainty, including those arising from systematic effects, such as components associated with corrections and reference standards, contribute to this dispersion. 3.16 validation process of evaluating the performance of a measuring procedure and checking that the performance meets certain pre-set criteria SIST EN 14412:2004

Figure 1 – Diagram of diffusion process The inlet of a sampler with cross-section A at position 1 defines the beginning of the diffusion path of an analyte with a concentration of ρ1. A sorbent at position 2, which will reduce the concentration of the analyte, ρ2, to zero (ideally) due to sorption or chemical reaction, serves as the driving force for the diffusion along l. In practice, there are a number of factors that can give rise to non-ideal behaviour, so that: lktDAms××××=ρ (3) NOTE The correction factor k can be a function of concentration and time of exposure (see 5.3). A general overview of the principles of diffusive sampling is given in [3]. 5.2 Dimensions of diffusive uptake rate For a given concentration ρ in micrograms per cubic metre of gas or vapour, the diffusive uptake rate is given by: tmUs×=ρ (4) NOTE Although the uptake rate, U, has dimensions of volume per unit time, this does not indicate a real volumetric flow of (analyte in) air. SIST EN 14412:2004

6.9 Personal monitoring Personal monitoring is the measurement of pollutants in the air that is breathed. In general diffusive samplers for stationary measurements may be used for personal monitoring provided that the sampler design (size, fixing) is appropriate.
6.10 Validation of indoor pollution models Indoor air pollution models can be used to predict the concentration of pollutant in a building at a design stage based on an understanding of ventilation, air movement, source strength and sink effects. Modelling can also be applied to predict the effectiveness of remedial or control measures. The models need to be validated with experimental data. 6.11 Measurement of mean ventilation rates Ventilation rates in buildings can be determined using tracer gases. Tracer gas is released into the building at a controlled rate and its concentration measured in the indoor air. Diffusive samplers can be used to measure some tracer gases for the determination of the mean ventilation rate over a period of days or weeks. SIST EN 14412:2004
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