BS 4325-5-1978 Methods for analysis of oilseed residues - Determination of diethyl ether extract《油料种子残留物分析方法 第5部分 二乙醚萃取物测定》.pdf
《BS 4325-5-1978 Methods for analysis of oilseed residues - Determination of diethyl ether extract《油料种子残留物分析方法 第5部分 二乙醚萃取物测定》.pdf》由会员分享,可在线阅读,更多相关《BS 4325-5-1978 Methods for analysis of oilseed residues - Determination of diethyl ether extract《油料种子残留物分析方法 第5部分 二乙醚萃取物测定》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS 4325-5: 1978 Methods for Analysis of oilseed residues Part 5: Determination of diethyl ether extract UDC 633.85:665.3.002.68:543.832:547.272.1BS4325-5:1978 This British Standard, having been prepared under the directionof the Oil and Fats Standards Committee was published under t
2、he authority ofthe Executive Board on 29December1978 BSI 10-1999 First publishedJuly1968 First revisionDecember1978 The following BSI references relate to the work on this standard: Committee reference OFC/24 Draft for approval 78/50361 ISBN 0 580 10473 7 Cooperating organizations The Oils and Fats
3、Standards Committee, under whose direction this BritishStandard was prepared, consists of representatives from the following Government department and scientific and industrial organizations: Chemical Industries Association Chemical Society, Analytical Division* Department of Industry, Laboratory of
4、 the Government Chemist* Greater London Council Lard Association Margarine and Shortening Manufacturers Association* Overseas Development Administration Tropical Products Institute* Royal Institute of Public Health and Hygiene Seed Crushers and Oil Processors Association* Soap and Detergent Industry
5、 Association* United Kingdom Renderers Association Ltd. The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Fatty Acid Distillers British Food Manu
6、facturing Industries Research Association British Resin Manufacturers Association Co-operative Wholesale Society Ltd. Federation of Gelatine and Glue Manufacturers Limited Federation of Oils, Seeds and Fats Association Ltd. Ministry of Agriculture Fisheries and Food National Linseed Oil Processors A
7、ssociation Oil and Colour Chemists Association Rubber Growers Association Society of Chemical Industry United Kingdom Glycerine Producers Association Amendments issued since publication Amd. No. Date of issue CommentsBS4325-5:1978 BSI 10-1999 i Contents Page Cooperating organizations Inside front co
8、ver Foreword ii 0 Introduction 1 1 Scope and field of application 1 2 References 1 3 Definition 1 4 Principle 1 5 Reagents and materials 1 6 Apparatus 1 7 Procedure 1 8 Expression of results 2 9 Notes on procedure 2 10 Test report 2 Publications referred to Inside back coverBS4325-5:1978 ii BSI 10-1
9、999 Foreword This Part of BS 4325, which was prepared under the direction of the Oils and Fats Standards Committee, constitutes the first revision of BS 4325-5:1968. It is identical with ISO 736 “Oilseed residues Determination of diethyl ether extract”, except for changes in clauses 0, 1, 2, 7.1.1,
10、8.1.2 and 10. In clauses 1 and10 the words “International Standard” have been replaced by “BritishStandard”. Clause2 and the sampling instructions given in 7.1.1 have been altered because the ISO text refers to a sampling standard which is not yet available. In clauses 0, 2 and 8.1.2 the references
11、to International Standards have been replaced by references to British Standards. The text of the International Standard has been used as the basis of this BritishStandard; therefore certain conventions are not identical with those normally used in British Standards; attention is especially drawn to
12、 the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Important note. Attention is drawn to Statutory Instrument 1973 No 1521 (Agriculture. The Fertilisers and Feeding Stuffs Regulations 197
13、3) and to Statutory Instrument 1976 No 840 (Agriculture. The Fertilisers and Feeding Stuffs (Amendment) Regulations 1976), which control the sale of oilseed residues and compound cakes or meals intended for animal feeding purposes in the UnitedKingdom and prescribe methods for determining specified
14、analytical characteristics. Where differences exist between these methods and those given in this British Standard the latter may be used only for purposes which do not fall within the scope of the Statutory Instruments. Additional information. A sieve complying with the requirements of BS410 “Speci
15、fication for test sieves” will satisfy the requirement in6.3. A Soxhlet extractor complying with the requirements of BS 2071 “Soxhlet extractors” will satisfy the requirement in6.5 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards a
16、re 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, pagesi andii, pages1 and2, an inside back cover and a back cover. This standard h
17、as been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS4325-5:1978 BSI 10-1999 1 NOTEThose parts of the text which differ from ISO736 are indicated by a vertical line in the margin. Otherwise this stand
18、ard is identical with ISO736. 0 Introduction This British Standard was established because the principal users of oilseed residues, namely the manufacturers of animal feeding stuffs, have always determined the oil content of oilseed residues by extraction with diethyl ether and have accumulated a la
19、rge amount of data on the subject. However, as the determination of the oil content of oilseeds is carried out according to BS 4289-3, it was thought necessary that the oil content of oilseed residues should be determined in the same way in order to provide for control of oil production. That method
20、 is therefore the subject of BS 4325-4. The two methods do not always give the same results. 1 Scope and field of application This British Standard specifies a method for the determination of the diethyl ether extract of residues (excluding compounded products) obtained by the extraction of oil from
21、 oilseeds by pressure or solvent. 2 References The titles of the publications referred to in this standard are given on the inside back cover. NOTEAn International Standard, ISO 5500 “Oilseed residues Sampling”, is in course of preparation. It is intended to publish a British Standard dealing with s
22、ampling of oilseed residues at a later date. Until such time, preparation of the contract sample should be in accordance with7.1.1. 3 Definition 3.1 diethyl ether extract the whole of the substances extracted by diethyl ether under the operating conditions specified below 4 Principle Extraction of a
23、 test portion with diethyl ether in a suitable apparatus. 5 Reagents and materials 5.1 Diethyl ether, anhydrous, practically free from peroxides ( 200,712 to 0,716 g/ml, boiling point34,5 C), analytical quality, the non-volatile residue of which at 80 C is not greater than 0,001% (m/m). 5.2 Sand, wa
24、shed with hydrochloric acid and calcined. 5.3 Pumice stone, in small particles, previously dried. 5.4 Sodium sulphate, anhydrous, analytical quality. 6 Apparatus 6.1 Analytical balance 6.2 Mechanical mill, easy to clean and allowing the residues to be ground, without heating and without appreciable
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