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BRITISH STANDARD BS EN 12260 2003 BS 6068 2 83 2003 Water quality — Determination of nitrogen — Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides The European Standard EN 1[.]
BRITISH STANDARD BS EN 12260:2003 BS 6068-2.83:2003 Water quality — Determination of nitrogen — Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides The European Standard EN 12260:2003 has the status of a British Standard ICS 13.060.50 12&23 700 °C Quantification is carried out by suitable detection methods, as infrared spectroscopy, potentiometry, amperometry NO/NO2 gas sensors Users of alternative methods should prove the equivalence of the method in comparison with the method given in the main part of this standard 10 EN 12260:2003 (E) Annex B (informative) Recovery rates of single compounds using oxidation and chemiluminescence detection (see table B.1) Table B.1 — Recovery rates of single compounds Test substance Recovery Test concentration range % mg/l N Ammonium sulfate 95 to 100 to 100 Potassium nitrate 97 to 105 10 to 50 Sodium nitrate 101 — Caffeine 98 — Glycine 95 to 99 10 Urea 92 to 99 10 Nicotinic acid 98 to 102 — Glutamic acid 97 — Thiocyanates 98 — Acetanilide 99 — 1,6-Hexanediamine 96 to 101 10 to 50 Nitrophenols 93 to 102 10 to 50 Nitroanilines 91 to 100 10 to 50 Arginine 94 to 106 10 to 50 54 — 94 to 102 20 Potassium hexacyanoferrate(III) 99 10 Potassium hexacyanoferrate(II) 92 to 96 10 Purine 95 to 101 20 Calcium nitrate 99 to 102 10 Sodium azide Benzonitrile 11 EN 12260:2003 (E) Annex C (informative) Precision data An interlaboratory trial was carried out in November 2001 with the participation of laboratories from European countries and resulted in the values given in table C.1 The trial was calculated according to ISO 5725-2 and includes only data from the chemiluminescence detection Table C.1 — Precision data for the determination of total nitrogen (TNb); (all mass concentrations in mg/l N) Sample Matrix L N NAP xref X % mg/l mg/l R VCR r VCr % mg/l % mg/l % Standard 35 140 14,6 52,0 49,7 95,5 3,05 6,1 0,66 1,3 Surface water I 36 143 7,7 — 3,38 — 0,272 8,1 0,072 2,1 Surface water II 38 151 7,4 — 6,73 — 0,659 9,8 0,141 2,1 Effluent waste water treatment I 38 151 7,4 — 8,50 — 0,735 8,6 0,147 1,7 Effluent waste water treatment II 39 156 4,9 — 18,2 — 1,78 9,8 0,28 1,5 Leachate I 34 134 17,3 — 145 — 5,5 3,8 1,9 1,3 Leachate II 37 146 9,9 — 209 — 12,1 5,8 2,5 1,2 where L is the number of laboratories N is the number of values NAP is the percentage of outliers xref is the total mean X is the required value WFR is the recovery rate R is the reproducibility standard deviation VCR is the reproducibility coefficient of variation r is the repeatability standard deviation VCr is the repeatability coefficient of variation 12 WFR EN 12260:2003 (E) Bibliography Braun, M.; Hoffmann, K.; Müller, M.; Rinne, D und Seckert-Knopp, W.: Beitrag zur Bestimmung des gesamten gebundenen Stickstoffes und Ermittlung des organisch gebundenen Stickstoffes in der Wasseranalytik, Z Wasser-Abwasser-Forschung 24, 135-147 (1991) EN 1484:1997, Water analysis — Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC) ISO 2854, Statistical interpretation of data — Techniques of estimation and tests relating to means and variances 13 BS EN 12260:2003 BS 6068-2.83:2003 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: +44 (0)20 8996 9000 Fax: +44 (0)20 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 Email: orders@bsi-global.com Standards are also available from the BSI website at http://www.bsi-global.com In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre Tel: +44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: info@bsi-global.com Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001 Email: membership@bsi-global.com Information regarding online access to British Standards via British Standards Online can be found at http://www.bsi-global.com/bsonline Further information about BSI is available on the BSI website at http://www.bsi-global.com Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI BSI 389 Chiswick High Road London W4 4AL This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained Details and advice can be obtained from the Copyright & Licensing Manager Tel: +44 (0)20 8996 7070 Fax: +44 (0)20 8996 7553 Email: copyright@bsi-global.com