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EN 14662-1:2005

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Ambient air quality - Standard method for measurement of benzene concentrations - Part 1 : Pumped sampling followed by thermal desorption and gas chromatography
Withdrawn date

30-11-2005

Published date

18-05-2005

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Method description
  4.1 Principle
  4.2 Reagents and materials
  4.3 Apparatus
  4.4 Sample tube conditioning
  4.5 Setting of sampling flow rate
  4.6 Sampling
  4.7 Procedure
  4.8 Calculation of mass concentration of benzene
  4.9 Report
5 Determination of measurement uncertainty
  5.1 Introduction
  5.2 Parameters contributing to measurement uncertainty
6 Recommendations for use
Annex A (informative) Extrapolated retention volumes and safe
                      sampling volumes for benzene at 20 degrees C
Annex B (informative) Description of sorbent types
Annex C (informative) Guidance on sorbent selection
Annex D (informative) Guidance on sorbent use
Annex E (informative) Determination of breakthrough volume from gas
                      standards
Annex F (informative) Determination of breakthrough volumes from
                      extrapolated retention volumes
Annex G (informative) Assessment of performance indicators and
                      uncertainty contributions
Annex H (informative) Performance characteristics
Bibliography

This part of EN 14662 gives general guidance for the sampling and analysis of benzene in air by pumped sampling, thermal desorption and capillary gas chromatography. This part of EN 14662 is in accordance with the generic methodology selected as the basis of the European Union reference method for the determination of benzene in ambient air [1] for the purpose of comparison of measurement results with limit values with a one-year reference period. This part of EN 14662 is valid for the measurement of benzene in a concentration range of approximately 0,5 mg/m3 to 50 mg/m3 in an air sample typically collected over a period of 24 hours. The upper limit of the useful range is set by the sorptive capacity of the sorbent and by the linear dynamic range of the gas chromatograph column and detector or by the sample splitting capacity of the analytical instrumentation used. The lower limit of the useful range depends on the noise level of the detector and on blank levels of benzene and/or interfering artefacts on the sorbent. Artefacts are typically sub ng for sorbents, but higher levels of aromatic hydrocarbons have been noted in other sorbents. The detection limit will be approximately 1/10 of the lower concentration range.

Committee
CEN/TC 264
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Withdrawn

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