ISO-5765-2-2002.pdf
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1、 Reference numbers ISO 5765-2:2002(E) IDF 79-2:2002(E) ISO and IDF 2002 INTERNATIONAL STANDARD ISO 5765-2 IDF 79-2 First edition 2002-09-01 Dried milk, dried ice-mixes and processed cheese Determination of lactose content Part 2: Enzymatic method utilizing the galactose moiety of the lactose Lait se
2、c, mlanges secs pour crmes glaces et fromages fondus Dtermination de la teneur en lactose Partie 2: Mthode enzymatique par la voie galactose Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale,
3、04/19/2007 03:30:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5765-2:2002(E) IDF 79-2:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless
4、 the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. Neither the ISO Central Secretariat nor the IDF accepts any liability in this area. A
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6、O member bodies and IDF national committees. In the unlikely event that a problem relating to it is found, please inform the ISO Central Secretariat at the address given below. ISO and IDF 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized
7、 in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO or IDF at the respective address below. ISO copyright office International Dairy Federation Case postale 56 CH-1211 Geneva 20 Diamant Building Boulevard Auguste
8、 Reyers 80 B-1030 Brussels Tel. + 41 22 749 01 11 Tel. + 32 2 733 98 88 Fax + 41 22 749 09 47 Fax + 32 2 733 04 13 E-mail copyrightiso.org E-mail infofil-idf.org Web www.iso.org Web www.fil-idf.org Printed in Switzerland ii ISO and IDF 2002 All rights reserved Copyright International Organization fo
9、r Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 03:30:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5765-2:2002(E) IDF 79-2:2002(E) ISO 2002 All rights reserved iii Contents Foreword
10、 iv Foreword. v Introduction vi 1 Scope 1 2 Terms and definitions. 1 3 Principle . 1 4 Reagents 1 5 Apparatus. 3 6 Sampling 4 7 Procedure. 4 7.1 Test to check the procedure 4 7.2 Preparation of test sample. 4 7.3 Test portion 5 7.4 Reagent blank test 5 7.5 Deproteination. 5 7.6 Determination 6 8 Cal
11、culation and expression of results 7 8.1 Calculation. 7 8.2 Expression of results 8 9 Precision 8 9.1 Interlaboratory trial . 8 9.2 Repeatability 8 9.3 Reproducibility 8 10 Test report 9 Annex A (normative) Good Laboratory Practice (GLP) rules for the performance of enzymatic analyses 10 Bibliograph
12、y 14 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 03:30:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5765-2:2002(E) IDF 79-2:2002(E) iv ISO
13、 2002 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested
14、in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commi
15、ssion (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technica
16、l committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 5765IDF 79 may be the subject of patent ri
17、ghts. ISO shall not be held responsible for identifying any or all such patent rights. ISO 5765-2IDF 79-2 was prepared by Technical Committee ISO/TC 34, Food Products, Subcommittee SC 5, Milk and milk products, and the International Dairy Federation (IDF), in collaboration with AOAC International. I
18、t is being published jointly by ISO and IDF and separately by AOAC International. ISO 5765IDF 79 consists of the following parts, under the general title Dried milk, dried ice-mixes and processed cheese Determination of lactose content: Part 1: Enzymatic method utilizing the glucose moiety of the la
19、ctose Part 2: Enzymatic method utilizing the galactose moiety of the lactose Annex A forms a normative part of this part of ISO 5765IDF 79. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 0
20、4/19/2007 03:30:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5765-2:2002(E) IDF 79-2:2002(E) ISO 2002 All rights reserved v Foreword IDF (the International Dairy Federation) is a worldwide federation of the dairy sector with a National Committee in every member co
21、untry. Every National Committee has the right to be represented on the IDF Standing Committees carrying out the technical work. IDF collaborates with ISO and AOAC International in the development of standard methods of analysis and sampling for milk and milk products. Draft International Standards a
22、dopted by the Action Teams and Standing Committees are circulated to the National Committees for voting. Publication as an International Standard requires approval by at least 50 % of National Committees casting a vote. ISO 5765-2IDF 79-2 was prepared by Technical Committee ISO/TC 34, Food products,
23、 Subcommittee SC 5, Milk and milk products, and the International Dairy Federation (IDF), in collaboration with AOAC International. It is being published jointly by ISO and IDF and separately by AOAC International. ISO 5765IDF 79 consists of the following parts, under the general title Dried milk, d
24、ried ice-mixes and processed cheese Determination of lactose content: Part 1: Enzymatic method utilizing the glucose moiety of the lactose Part 2: Enzymatic method utilizing the galactose moiety of the lactose All work was carried out by the Joint ISO/IDF/AOAC Action Team Lactose and lactate determi
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