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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 13342:2000 The Euro
2、pean Standard EN 13342:2000 has the status of a British Standard ICS 13.030.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Characterization of sludges Determination of Kjeldahl nitrogen Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:05:49 GMT+00:00 2006, Uncontr
3、olled Copy, (c) BSI This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 October 2000 BSI 10-2000 ISBN 0 580 36290 6 BS EN 13342:2000 Amendments issued
4、since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 13342:2000. The UK participation in its preparation was entrusted to Technical Committee EH/5, Sludge characterization, which has the responsibility to: aid enquirers to unde
5、rstand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committe
6、e can be obtained on request to its secretary. Further information Users of this standard are informed that the UK submitted some substantial comments at the final voting stage of the draft EN for the following reasons. 1) In annex A, it is essential that the description of the four samples used in
7、the inter-laboratory comparison is given. This can be achieved by the addition of a simple footnote. It is recommended that this topic is discussed at the TC308 meeting in Utrecht. A documented minimum requirement for inter-laboratory comparisons is needed. 2) The following note should be added to t
8、he scope: The validation for this standard has only been carried out using materials as described in annex A. For other sludges, the user should validate the method using recovery and reproducibility tests. 3) The date that the laboratory inter-comparison was carried out should be also given. 4) The
9、 final phrase and sludge products, in the first sentence of the scope should be removed as it is inappropriate. 5) In 5.1, suggest replacing the first sentence, The digestion fails to determine nitrogen in the form , with The digestion may fail to fully recover nitrogen in the form of . Also suggest
10、 that a cross-reference to the UK Blue Book method be made. This has a useful introductory historical section (A1) on recoveries of difficult nitrogen species using the Kjeldahl method. Kjeldahl Nitrogen in Waters 1987, HMSO 1988, ISBN 0 11 752129 9 6) In annex A: (i) CVR, in column 6, should be CVr
11、in all three language versions: (ii) all of the English and German coefficients of variation of both reproducibility (CVR) and repeatability (CVr) are wrongly calculated. The values are wrong by up to a factor three, which is to high. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:05:49 G
12、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13342:2000 BSI 10-2000i 7) In the section on Analytical Quality Control (AQC), it is recommended that an additional brief section be added on the use of adequate AQC as per CEN/TC223 methods: The analysis described in this standard should be carried ou
13、t within a Quality Control system utilizing Analytical Quality Control measures. Where perfomance data is absent for the sample type, at a minimum recovery and reproducibility data should be obtained. Cross-references The British Standards which implement international or European publications refer
14、red to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contr
15、act. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 11
16、 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:05:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iiblank Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:05:49 GMT+0
17、0:00 2006, Uncontrolled Copy, (c) BSI (8523($1?67$1$5 1250(?(8523e(11( (8523b,6 J?NJ?P? ? J?NJ?P? 9LV?WKH?RYHUDOO?PHDQ? 5LV?WKH?VWDQGDUG?GHYLDWLRQ?RI?UHSURGXFLELOLW? 9&5LV?WKH?FRHIILFLHQW?RI?YDULDWLRQ?RI?UHSURGXFLELOLW? U LV?WKH?VWDQGDUG?GHYLDWLRQ?RI?UHSHDWDELOLW? 9&ULV?WKH?FRHIILFLHQW?RI?YDULDWLRQ?
18、UHSHDWDELOLW? PGULV?WKH?GU?PDVV? Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:05:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13342:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
19、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on stand
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28、written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:05:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI