BS 4401-10-1997 Methods of test for meat and meat products - Determination of total phosphorus content - Spectrometric method《肉及肉制品试验方法 第10部分 磷总含量测定 光度法》.pdf
《BS 4401-10-1997 Methods of test for meat and meat products - Determination of total phosphorus content - Spectrometric method《肉及肉制品试验方法 第10部分 磷总含量测定 光度法》.pdf》由会员分享,可在线阅读,更多相关《BS 4401-10-1997 Methods of test for meat and meat products - Determination of total phosphorus content - Spectrometric method《肉及肉制品试验方法 第10部分 磷总含量测定 光度法》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS 4401-10: 1997 ISO 13730: 1996 Methods of test for Meat and meat products Part 10: Determination of total phosphorus content: spectrometric method ICS 67.120.10BS4401-10:1997 This British Standard, having been prepared under the directionof the Consumer Products and Services Secto
2、r Board, was published under theauthority of the Standards Board and comes into effect on 15 April 1997 BSI 12-1999 ISBN 0 580 27241 9 National foreword This British Standard reproduces verbatim ISO13730:1996 and implements it as the UK national standard. It supersedes BS4401-10:1975 which is withdr
3、awn. The UK participation in its preparation was entrusted to Technical Committee AW/6, Chemical analysis of meat and meat products, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation,
4、 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 committee can be obtained on request. Cross-references The British Standards which implement international
5、or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the
6、necessary provisions of a contract. 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, t
7、heISO title page, pages ii to iv, pages 1 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS4401-10:
8、1997 BSI 12-1999 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 13730 1ii blankISO 13730:1996 ii BSI 12-1999 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Definition 1 4 Principle 1 5 Reagents 1 6 Apparatus 2 7 Sampling 2 8 Preparation of test sample 2
9、 9 Procedure 2 10 Calculation 3 11 Precision 3 12 Test report 3 Annex A (informative) Bibliography 4 Descriptors: Agricultural products, animal products, food products, meat, poultry meat, meat products, chemical analysis, determination of content, phosphorus, spectrophotometric analysis, spectromet
10、ric method.ISO 13730:1996 BSI 12-1999 iii 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
11、body interested 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 Electr
12、otechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a v
13、ote. International Standard ISO13730 was prepared by Technical Committee ISO/TC34, Agricultural food products, Subcommittee SC6, Meat and meat products. Annex A of this International Standard is for information only.iv blankISO 13730:1996 BSI 12-1999 1 1 Scope This International Standard specifies a
14、 method for the determination of the total phosphorus content of all kinds of meat and meat products, including poultry. The precision results quoted in this method relate only to processed sausages. 2 Normative reference The following standard contains provisions which, through reference in this te
15、xt, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editi
16、on of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 936:, Meat and meat products Determination of ash 1) . 3 Definition For the purposes of this International Standard, the following definition applies. 3.1 total phosphorus co
17、ntent of meat and meat products mass of phosphorus pentoxide determined by the procedure specified in this International Standard, expressed as a percentage of the mass of the test portion 4 Principle Drying of the test portion and incineration of the residue. After cooling, hydrolysis of the ash wi
18、th nitric acid. Filtration and dilution followed by the formation of a yellow compound with a mixture of ammonium monovanadate and ammonium heptamolybdate. Photometric measurement at a wavelength of430nm. 5 Reagents Use only reagents of recognized analytical grade and distilled or demineralized wate
19、r or water of at least equivalent purity. 5.1 Nitric acid, 1 + 2 (V/V) dilution. Mix 1 volume of nitric acid 65% (m/m); 20= 1,40g/ml with two volumes of water. 5.2 Ammonium monovanadate solution (NH 4 VCO 3 ),2,5g/l. Dissolve 2,5g of ammonium monovanadate in500ml of boiling water. Cool and transfer
20、quantitatively to a1000ml volumetric flask (6.7). Add20ml of the nitric acid (5.1), dilute to the mark with water and mix. 5.3 Ammonium heptamolybdate solution, (NH 4 ) 6 Mo 7 O 24 4H 2 O, 50g/l. Dissolve 50g of ammonium heptamolybdate tetrahydrate in about800ml of warm water (at approx.50 C). Cool
21、and transfer quantitatively to a1000ml volumetric flask. Dilute to the mark with water and mix. 5.4 Colour reagent Mix one volume of the nitric acid (5.1) with one volume of the ammonium monovanadate solution(5.2). Subsequently add one volume of the ammonium heptamolybdate solution (5.3) and mix. Th
22、e colour reagent should turn from pale yellow to completely clear. 5.5 Phosphate stock solution, c(P) = 218mg/l; c(P 2 O 5 )= 500mg/l. Dissolve in water958,8mg of potassium dihydrogen phosphate (KH 2 PO 4 ), previously dried for3h at103 C 2 C and allowed to cool in a desiccator. Transfer quantitativ
23、ely to a1000ml volumetric flask (6.7). Dilute to the mark with water and mix. 5.6 Phosphate standard solutions, containing between0,05mg and0,30mg of P 2 O 5per millilitre. Transfer by pipette or burette to100ml volumetric flasks (6.7)10ml, 20ml, 30ml, 40ml, 50ml and60ml of the phosphate stock solut
24、ion (5.5). Add10ml of the nitric acid (5.1). Dilute to the mark with water and mix. 5.7 Blank solution Pipette 2ml of the nitric acid (5.1) and30ml of the colour reagent (5.4) into a100ml volumetric flask(6.7). Dilute to the mark with water and mix. 1) To be published. (Revision of ISO 936:1978)ISO
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