BS DD ENV 12140-1997 利用等离子比质谱测量法测定果汁糖的稳定碳等离子比(UP1UP3C-UP1UP2C)的方法.pdf
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1、DRAFT FOR DEVELOPMENT DD ENV 12140:1997 Method for Determination of stable carbon isotope ratio (13C/12C) of sugars from fruit juices, using isotope ratio mass spectrometry ICS 67.160.20 DD ENV 12140:1997 This Draft for Development, having been prepared under the direction of the Consumer Products a
2、nd Services Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1997 BSI 12-1998 The following BSI reference relates to the work on this Draft for Development: Committee reference AW/21 ISBN 0 580 27018 1 Committees responsible for this Draft f
3、or Development The preparation of this Draft for Development was entrusted to Technical Committee AW/21, Fruit and vegetable juices, upon which the following bodies were represented: British Fruit Juice Importers Association British Retail Consortium British Soft Drinks Association Limited Campden a
4、nd Chorleywood Food Research Association Department of Trade and Industry (Laboratory of the Government Chemist) Leatherhead Food Research Association Ministry of Agriculture, Fisheries and Food Royal Society of Chemistry Amendments issued since publication Amd. No.DateComments DD ENV 12140:1997 BSI
5、 12-1998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of ENV 121403 List of referencesInside back cover DD ENV 12140:1997 ii BSI 12-1998 National foreword This Draft for Development has been prepared by Technical Committee AW/21, and is the English langu
6、age version of ENV 12140:1996 Fruit and vegetable juices Determination of the stable carbon isotope ratio (13C/12C) of sugars from fruit juices Method using isotope ratio mass spectrometry, published by the European Committee for Standardization (CEN). ENV 12140:1996 was produced as a result of inte
7、rnational discussions in which the United Kingdom took an active part. This publication is not to be regarded as a British Standard It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis so that informatio
8、n and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a European Standard. A review of this publication will be init
9、iated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its 3-year life. The commencement of the review period will be notified by an announcement in BSI Update. According to the replies received by the end of the review period, th
10、e responsible BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the prestandard or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee AW/21 at BSI, 389 Chiswick High Road, London W4 4AL, giving the
11、document reference and clause number and proposing, where possible, an appropriate revision of the text. ISO 5725:1986, to which informative reference is made in the text, has been superseded by ISO 5725-1:1994, ISO 5725-2:1994, ISO 5725-3:1994, ISO 5725-4:1994 and ISO 5725-6:1994, which are identic
12、al with the following Parts of BS ISO 5725 Accuracy (trueness and precision) of measurement methods and results: BS ISO 5725-1:1994, General principles and definitions. BS ISO 5725-2:1994, Basic method for the determination of repeatability and reproducibility of a standard measurement method. BS IS
13、O 5725-3:1994, Intermediate measures of the precision of a standard measurement method. BS ISO 5725-4:1994, Basic method for the determination of the trueness of a standard measurement method. BS ISO 5725-6:1994, Use in practice of accuracy values. Cross-references Publication referred toCorrespondi
14、ng British Standard ISO 3696:1987BS EN ISO 3696:1995 Specification for water for laboratory use Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ENV title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see
15、copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN PRESTANDARD PRNORME EUROPENNE EUROPISCHE VORNORM ENV 12140 October 1996 ICS 67.160.20 Descriptors: Food products, beverages, fruit and vegetable juices, chemica
16、l analysis, determination, ratios, isotopes, carbon mass spectrometry English version Fruit and vegetable juices Determination of the stable carbon isotope ratio (13C/12C) of sugars from fruits juices Method using isotope ratio mass spectrometry Jus de fruits et de lgumes Dtermination du rapport des
17、 isotopes stables du carbone (13C/12C) des sucres contenus dans les jus de fruits Mthode utilisant la spectromtrie de masse des rapports isotopiques Frucht- und Gemesfte Bestimmung des Verhltnisses der stabilen Kohlenstoff-Isotope (13C/12C) im Zuckeranteil von Fruchtsften Verfahren unter Verwendung
18、der Isotopenverhltnis-Massenspektrometrie This European Prestandard (ENV) was approved by CEN on 1996-02-29 as a prospective standard for provisional application. The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit th
19、eir comments, particularly on the question whether the ENV can be converted into an European Standard (EN). CEN members are required to announce the existance of this ENV in the same way as for an EN and to make the ENV available promptly at national level in an appropriate form. It is permissible t
20、o keep conflicting national standards in force (in parallel to the ENV) until the final decision about the possible conversion of the ENV into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxe
21、mbourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart, 36 B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. ENV
22、12140:1996 E ENV 12140:1996 BSI 12-1998 2 Foreword This European Prestandard has been prepared by the Technical Committee CEN/TC 174 “Fruit and vegetable juices Methods of analysis” of which the secretariat is held by AFNOR. According to the CEN/CENELEC Internal Regulations, the national standards o
23、rganizations of the following countries are required to announce the existence of this European Prestandard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Pa
24、ge Foreword2 1Scope3 2Normative references3 3Symbols3 4Principle3 5Reagents3 6Apparatus3 7Procedure4 8Calculation4 9Precision5 10Test report5 Annex A (informative) Bibliography7 Annex B (informative) Statistical results of the interlaboratory test7 Table B.17 ENV 12140:1996 BSI 12-19983 1 Scope This
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