ISO-10540-2-2003.pdf
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1、 Reference number ISO 10540-2:2003(E) ISO 2003 INTERNATIONAL STANDARD ISO 10540-2 First edition 2003-02-01 Animal and vegetable fats and oils Determination of phosphorus content Part 2: Method using graphite furnace atomic absorption spectrometry Corps gras dorigines animale et vgtale Dtermination d
2、e la teneur en phosphore Partie 2: Mthode par spectromtrie dabsorption atomique avec four en graphite Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 07:52:05 MDTNo reproduction
3、or networking permitted without license from IHS -,-,- ISO 10540-2:2003(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 the typefaces which are embedded are licensed to and i
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6、d, please inform the Central Secretariat at the address given below. ISO 2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in
7、writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2003 All rights reserved Copyr
8、ight International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 07:52:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 10540-2:2003(E) ISO 2003 All rights reserved iii
9、 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 in a subject for which a
10、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 Commission (IEC) on all matter
11、s of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulat
12、ed 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 document may be the subject of patent rights. ISO shall not be held responsible
13、 for identifying any or all such patent rights. ISO 10540-2 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 11, Animal and vegetable fats and oils. ISO 10540 consists of the following parts, under the general title Animal and vegetable fats and oils Determination of pho
14、sphorus content: Part 1: Colorimetric method Part 2: Method using graphite furnace atomic absorption spectrometry Part 3: Method using inductively coupled plasma (ICP) optical emission spectroscopy Copyright International Organization for Standardization Provided by IHS under license with ISO Licens
15、ee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 07:52:05 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not fo
16、r Resale, 04/22/2007 07:52:05 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 10540-2:2003(E) ISO 2003 All rights reserved 1 Animal and vegetable fats and oils Determination of phosphorus content Part 2: Method using graphite furnace atomic absorp
17、tion spectrometry 1 Scope This International Standard specifies a rapid method for the determination of trace amounts of phosphorus (u 40 mg/kg) in crude or refined animal and vegetable fats and oils (hereafter referred to as fats). The limit of determination of the method is 1,0 mg/kg. 2 Normative
18、references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 661, Animal and vegetable fats and
19、 oils Preparation of test sample ISO 10540-1, Animal and vegetable fats and oils Determination of phosphorus content Part 1: Colorimetric method 3 Principle A test portion is mixed with a matrix modifier then vaporized in a graphite furnace atomic absorption spectrometer, previously calibrated using
20、 standard dilutions of soya lecithin. The phosphorus content is calculated from the absorption at a wavelength of 213,5 nm. 4 Reagents Use only reagents of recognized analytical grade, unless otherwise specified. 4.1 Cyclohexane. 4.2 Matrix modifier. Dissolve 1 g of lanthanum organometallic standard
21、 with a lanthanum content of 5 000 mg/kg in 10 ml of cyclohexane (4.1). It is essential that the lanthanum be added for the determination of the total phosphorus content. If it is omitted, the amount of phosphorus determined will vary, depending on the type of phosphatides present in the sample. Cop
22、yright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 07:52:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 10540-2:2003(E) 2 ISO 2003 All rights reserved
23、 NOTE A suitable lanthanum organometallic standard is available, for example, from Continental Oil Company, Ponca City, Oklahoma, USA (Conostan, 5 000 mg/kg) or from Merck, D-1600 Darmstadt, Germany (metal in standard oil, 1 000 mg/kg)1). 4.3 Blank oil: refined liquid edible oil with a phosphorus co
24、ntent below 1 mg/kg. The phosphorus content of the blank oil may be determined in accordance with ISO 10540-1. 4.4 Soya lecithin (commercial product), well-defined, with a phosphorus content of about 2 % (by mass). 4.5 Standard stock solution, with a phosphorus content of about 400 mg/kg. Dissolve 1
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