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1、BRITISH STANDARD BS 6947:1988 Specification for Acid oils and recovered fatty acid distillates UDC 665.12.124:000.1 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:27:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6947:1988 This British Standard, having been prepared under the direction
2、of the Food and Agriculture Standards Committee, was published under the authority of the Board of BSI and comes into effect on 29 February 1988 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference FAC/18 Draft for comment 86/52236 DC ISBN 0 580 16471 3 C
3、ommittees responsible for this British Standard The preparation of this British Standard was entrusted by the Food and Agriculture Standards Committee (FAC/-) to Technical Committee FAC/18, upon which the following bodies were represented: AFRC Institute of Food Research (Bristol Laboratory) AFRC In
4、stitute of Food Research (Reading Laboratory) Association of Public Analysts British Food Manufacturing Industries Research Association Co-operative Union Department of Trade and Industry (Laboratory of the Government Chemist) Fosfa International International Association of Seed Crushers Margarine
5、and Shortening Manufacturers Association Ministry of Agriculture, Fisheries and Food Overseas Development Administration (Tropical Development and Research Institute) Retail Consortium Royal Society of Chemistry Seed Crushers and Oil Processors Association Soap and Detergent Industry Association Tro
6、pical Growers Association United Kingdom Glycerine Producers Association United Kingdom Renderers Association Ltd. Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:27:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6947:1988
7、 BSI 11-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Iodine value1 4Moisture and other volatile matter1 5Insoluble impurities1 6Moisture and other volatile matter and insoluble impurities1 7Ash1 8Dissolved soap (alkalinity)1 9Acidity1 10Unsaponifiabl
8、e matter1 11Saponifiable matter1 12Polyethylene-type plastics1 Table 1 Typical ranges of iodine values and unsaponifiable matter contents1 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:27:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6947:1988
9、 ii BSI 11-1999 Foreword This British Standard has been prepared under the direction of the Food and Agriculture Standards Committee in response to the need of sellers, buyers and other interested parties for a specification for acid oils and recovered fatty acid distillates for use in the drawing u
10、p of contracts and in other matters relating to trade. 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. Compliance with a British Standard does not of itself confer immunity from legal
11、 obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover 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 tab
12、le on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:27:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6947:1988 BSI 11-19991 1 Scope This British Standard specifies the principal requirements for acid oils and recovered fatty acid distillates. It is not applicab
13、le to refined distilled fatty acids. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2.1 acid oil the product obtained from alkaline refining of a crude fat a
14、nd the acid neutralization of the resulting aqueous soapstock 2.2 recovered fatty acid distillate the product obtained by distillation of a crude fat 2.3 parent fat the material from which the acid oil or recovered fatty acid distillate is derived NOTEThe word “fat” is used to denote any animal or v
15、egetable fat or oil whether in the liquid or solid state. 3 Iodine value The iodine value shall be not more than three units outside the range given in Table 1 for the parent fat when both are determined by the method described in BS 684-2.13. Table 1 Typical ranges of iodine values and unsaponifiab
16、le matter contents 4 Moisture and other volatile matter The content of moisture and other volatile matter shall be not more than 2.0 % (m/m) when determined by method A described in BS 684-1.10. 5 Insoluble impurities The content of impurities insoluble in light petroleum shall be not more than 0.4
17、% (m/m) when determined by the method described in BS 684-2.3:1983 using the solvent specified in 4.1 of that standard. 6 Moisture and other volatile matter and insoluble impurities The sum of the contents of moisture and other volatile matter when determined as in clause 4 and of insoluble impuriti
18、es when determined in clause 5 shall be not more than 2.0 % (m/m). 7 Ash The ash shall be not more than 0.25 % (m/m) when determined by the method described in BS 684-2.2. 8 Dissolved soap (alkalinity) The dissolved soap (alkalinity) shall be not more than 0.2 % (m/m) when determined by the method d
19、escribed in BS 684-2.5 and expressed as sodium hydroxide. 9 Acidity The acidity shall be 40 % (m/m) to 75 % (m/m) for acid oils and 75 % (m/m) to 90 % (m/m) for recovered fatty acid distillates when determined by method 1 described in BS 684-2.10 and calculated as the acid appropriate to the parent
20、fat or, in the case of mixtures, as oleic acid. The mineral acidity shall be not more than 3.0 when determined by method 3 described in BS 684-2.10. 10 Unsaponifiable matter The unsaponifiable matter content shall be within 1 % (m/m) (absolute) of that given in Table 1 for the parent fat when both a
21、re determined by method 1 described in BS 684-2.7. 11 Saponifiable matter The saponifiable matter content shall not be lower than 95 % (m/m) when calculated by the method described in BS 684-2.15. 12 Polyethylene-type plastics The polyethylene-type plastics content shall be not greater than 200 mg/k
22、g when determined by any of the methods described in BS 684-2.26. Parent fatIodine value Unsaponifiable matter content % (m/m) Coconut oil6111 Cottonseed oil991171.5 Groundnut (Arachis) oil801051 Maize oil1031283 Olive oil75941.5 Palm kernel oil13231 Palm oil50551 Pork fat45701 Premier jus32471 Rape
23、seed oil (high erucic)941202 Rapeseed oil (low erucic) 1101262 Soya bean oil1201431.5 Sunflowerseed oil1101401.5 Tallow32582 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:27:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 blank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:27
24、:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6947:1988 BSI 11-1999 Publications referred to BS 684, Methods of analysis of fats and fatty oils. BS 684-1.10, Determination of moisture and other volatile matter. BS 684-2.2, Determination of ash. BS 684-2.3, Determination of insoluble impurities.
25、BS 684-2.5, Determination of dissolved soap (alkalinity). BS 684-2.7, Determination of unsaponifiable matter. BS 684-2.10, Determination of acidity. BS 684-2.13, Determination of iodine value. BS 684-2.15, Calculation of total saponifiable matter. BS 684-2.26, Determination of polyethylene-type plas
26、tics. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:27:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6947:1988 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the U
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