CEC harmonization of methods for measurement of NOx
114 pages
English
Le téléchargement nécessite un accès à la bibliothèque YouScribe
Tout savoir sur nos offres

Description

Phase 2: Preparation for a Community-wide experiment
Environmental degradation
Research policy and organisation
Environmental research

Sujets

Informations

Publié par
Nombre de lectures 57
Langue English
Poids de l'ouvrage 2 Mo

Extrait

Commission of the European Communities
environment anil
quality of life
ssKasMBia&v.
CEC harmonization of methods for
measurement of NOx
Phase 2 — Preparation for a Community-wide experiment Commission of the European Communities
environment and
quality of life
CEC harmonization of methods for
measurement of NOx
Phase 2 — Preparation for a Community-wide experiment
A.J. Apling,1 H.J. Peperstraete2
1 Department of Industry
Warren Spring Laboratory
Gunnels Wood Road
Stevenage, Hertfordshire SG1 2 BX
United Kingdom
2 Studiecentrum voor Kernenergie
Boeretang 200
B-2400 Mol
Contracts Nos XI/3542/W(80)356(350)
XI/3542/W(80)573
PARI. EUROP. Biblioth.
Directorate-General N c
Environment, Consumer Protection and Nuclear Safety '
*t
1985 E0W9649EN Published by the
COMMISSION OF THE EUROPEAN COMMUNITIES
Directorate-General
Information Market and Innovation
Batiment Jean Monnet
LUXEMBOURG
LEGAL NOTICE
Neither the Commission of the European Communities nor any person
acting on behalf of the Commission is responsible for the use which might
be made of the following information
Cataloguing data can be found at the end of this publication
Luxembourg, Office for Official Publications of the European Communities, 1985
ISBN 92-825-5299-3 Catalogue number: CD-NO-85-004-EN-C
© ECSC-EEC-EAEC, Brussels ■ Luxembourg, 1985
Printed in the FR of Germany CONTENTS
Directory of Laboratories
Primary Standards Management 31
A proposed method of error assessment 59
III CEC HARMONISATION OF METHODS FOR MEASUREMENT OF NOX:
PREPARATION FOR A COMMUNITY-WIDE EXPERIMENT
SUMMARY
Following a preliminary experiment on the harmonisation of
methods for measurement of oxides of nitrogen (NOX), Warren
Spring Laboratory and SCK-CEN Nuclear Centre, under contract
to the Commission of the European Communities, undertook
three tasks in preparation for a Community-wide
harmonisation programme; compiling a directory of probable
participating Laboratories, preparing a report on the
management of primary standards, and investigating methods
for assessing the error of NOX measurements.
From February 1981 to July 1981, information was collected
on European Laboratories engaged in the measurement of
ambient nitrogen oxide (NOX) concentrations. Most of these
Laboratories were designated by their National Governments
to take part in Community harmonisation programmes for the
measurement of NOX. Some Laboratories agreed to take part
at the invitation of their National Governments or the
Commission. Details of these Laboratories, including staff
responsible for NOX measurement, equipment used, calibration
methods and current measurement programmes are given." This
information forms the basis for organising further practical
phases of the CEC NOX Harmonisation Programme. In addition,
it is hoped that the Directory will promote communication
and exchange of information between Laboratories concerned
with NOX measurement.
The objective of the primary standards management study was
to compile an inventory reflecting the present state of the
art in relation to the calibration techniques for nitrogen
oxides and to examine critically the means of traceability
to available primary standards. Wider knowledge of the
problems and techniques of calibration will ensure that the
practitioners of the art will develop a more critical eye
for the methods they use. The overall aim of this CEC
harmonisation programme is to ensure the intercomparability
of ambient N0X measurements in the member states. In the n of instrumental methods accurate reliable methods for calibration and traceability to primary
standards are the first step in ensuring that data from
various sources are truly comparable.
The objective of the error assessment investigation was to
identify a method for calculating quantitative error
estimates, to be reported with measurements of ambient N0X
concentrations, that could be used by participants in CEC
inter- laboratory calibration, or harmonisation,
experiments. Since no generally accepted, clearly defined
method could be found, this report attempts to develop one.
The basis of the proposed method is the expression of error
estimates solely in terms of "Accuracy" and "Precision".
These terms are defined and the elements of the measurement
process contributing to each type of error are described.
Simple propagation formulae are proposed to combine these
elements into overall error estimates. The method is
illustrated by a worked example, based on the
chemiluminescent measurement of NOx, in which the possible
differences between the error associated with a
harmonisation experiment and that appropriate for ambient
measurement are stressed. It is shown that the error of
nitrogen dioxide (NO2) measurement made by the
chemiluminescent method is a function of the ratio of NO to
NO2 concentrations. It is proposed that, subject to the
critical review of participating Laboratories, the method
will form the basis of error assessment in the next CEC
harmonisation programme. CEC HARMONISATION OF METHODS FOR MEASUREMENT OF
NOX: DIRECTORY OF LABORATORIES CONTENTS
Page No.
1. INTRODUCTION 3
DIRECTORY
Belgium Bl
Belgium B2
Commission of the European Communities EU1
Denmark DK1
Federal Republic of Germany Dl lc ofy D2
Federal Republic of Germany D3
France Fl
France F2 e F3
France F4
Greece GR1 e GR2
Greece GR3
Italy 11
Luxembourg
Netherlands NL1 s2
Republic of Ireland
Kingdom Gl United m G2 d
27 REFERENCES
APPENDIX A: Text of Invitation by the Environment and Consumer Protection
Service to Designate Laboratories, Dated 9 February 1981 28
APPENDIX B: Operational Characteristics of Chemiluminescent NOX Detectors 29

  • Univers Univers
  • Ebooks Ebooks
  • Livres audio Livres audio
  • Presse Presse
  • Podcasts Podcasts
  • BD BD
  • Documents Documents