BS-5551-4.2.1-1978 ISO-5316-1977.pdf
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1、BRITISH STANDARD BS 5551-4.2.1: 1978 ISO 5316:1977 Fertilizers Part 4: Chemical analysis Section 4.2 Determination of phosphorus Subsection 4.2.1: Extraction of water-soluble phosphates ISO title: Fertilizers Extraction of water-soluble phosphates UDC 631.8:543.06:543.847 Licensed Copy: sheffieldun
2、sheffieldun, na, Mon Dec 04 14:23:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551-4.2.1:1978 This British Standard, having been prepared under the direction of the Chemicals Standards Committee, was published under the authority of the Executive Board on 31 January 1978 BSI 10-1999 The followi
3、ng BSI references relate to the work on this standard: Committee reference CIC/37 Draft for comment 76/51155 DC ISBN 0 580 09979 2 Cooperating organizations The Chemicals Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Gov
4、ernment departments and scientific and industrial organizations: Association of Fatty Acid Distillers British Tar Industry Association Chemical Industries Association* Chemical Society, Analytical Division Department of Health and Social Security Department of Industry, Chemicals and Textiles Divisi
5、on Department of Industry, Laboratory of the Government Chemist* Fertiliser Manufacturers Association Ltd.* Hydrocarbon Solvents Association Institution of Gas Engineers Ministry of Agriculture, Fisheries and Food* Ministry of Defence National Sulphuric Acid Association Paintmakers Association of Gr
6、eat Britain Ltd. Royal Institute of Public Health and Hygiene Soap and Detergent Industry Association Standardization of Tar Products Tests Committee The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with th
7、e preparation of this British Standard: British Agrochemicals Association Institute of Trading Standards Administration Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:23:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551
8、-4.2.1:1978 BSI 10-1999i Contents Page Cooperating organizationsInside front cover National forewordii 1Scope and field of application1 2Reference1 3Principle1 4Reagent1 5Apparatus1 6Sampling1 7Procedure1 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 0
9、4 14:23:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551-4.2.1:1978 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Chemicals Standards Committee in order to standardize terminology and labelling, sampling and methods of physical and chemical
10、testing for fertilizers. For some years the United Kingdom has participated in the standardization of methods of analysing fertilizers through Subcommittee 4, Chemical analysis, of Technical Committee 134, Fertilizers and soil conditioners, of the International Organization for Standardization (ISO)
11、. As international agreement is reached on the methods, it is proposed to publish them as Sections of BS 5551. The standard is to be published in 4 Parts, each Part being subdivided into Sections and, where appropriate, Subsections. The four main Parts are: Part 1: Terminology and labelling; Part 2:
12、 Sampling; Part 3: Physical properties; Part 4: Chemical analysis. Part 4 is to be divided into five Sections as follows: Section 4.1: Determination of nitrogen; Section 4.2: Determination of phosphorus; Section 4.3: Determination of potassium; Section 4.4: Determination of water; Section 4.5: Deter
13、mination of other constituents. This Subsection of Part 4 is identical with ISO 5316 “Fertilizers Extraction of water-soluble phosphates”. Terminology and conventions. The text of the International Standard has been accepted as suitable for publication, without deviation, as a British Standard. Cert
14、ain terminology and conventions are used, however, that are not identical with those used in British Standards. Attention is therefore drawn to the following. Where the words “International Standard”, relating to this publication, appear, they should be interpreted as “British Standard”. The comma h
15、as been used as a decimal marker. In British Standards it is current practice to use a full point (a full stop on the baseline) as the decimal marker. Cross references. For the following reference to another International Standard that is given in the text, there is an equivalent British Standard; t
16、his is given below. Additional information. With reference to clause 4, water complying with the requirements of BS 3978 is suitable. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. C
17、ompliance with a British Standard does not of itself confer immunity from legal obligations. Reference to International Standard Equivalent British Standard ISO Sampling a Fertilizers BS 5551-2.1 Principles of samplinga a In course of preparation. Summary of pages This document comprises a front cov
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