ASTM D5560-1995(2006) Standard Test Method for Determination of Neutral Fatty Matter Contained in Fats and Oils《脂肪和油中所含中性脂肪物质测定的标准试验方法》.pdf

1、Designation: D 5560 95 (Reapproved 2006)Standard Test Method forDetermination of Neutral Fatty Matter Contained in Fats andOils1This standard is issued under the fixed designation D 5560; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis

2、ion, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers all degraded glycerides, sincethey are neutral fats. However, this procedure

3、 does not neces-sarily determine all the mono and diglycerides that may bepresent in the sample. This is due to the water solublecharacteristics of some mono and diglycerides.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard does not purport to address all of thes

4、afety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 5553 Test Method for Determ

5、ination of the Unsaponifi-able Nonvolatile Matter in Sulfated Oils3. Significance and Use3.1 This test method is intended for the determination of theneutral fatty matter contained in fats and oils by means of etherextraction.4. Apparatus and Reagents4.1 Erlenmeyer Flask, 125 mL.4.2 Separatory Funne

6、l.4.3 NaOH, 0.5 N.4.4 Petroleum Ether.4.5 Phenolphthalein Indicator.4.6 Ethyl Alcohol, denatured.5. Procedure5.1 Weigh5gofsample into a 125-mL assay flask and add50 mL of alcohol. Warm and rotate, if necessary, to dissolve.Titrate with 0.5 N NaOH to end point using phenolphthaleinindicator. Cool, th

7、en add 1 mL excess 0.5 N NaOH and rotateflask. Extract three times with 50-mL portions of petroleumether and wash combined ether layers with water until freefrom alkali. Evaporate ether and dry to constant weight.6. Calculation6.1 Calculate the total neutral oily matter as follows:total neutral oily

8、 matter 5weight of residue 3 100weight of sample(1)6.2 Determine the total neutral oily matter including unsa-ponifiables, if any, as in Test Method D 5553, and subtract toobtain neutral fatty matter.7. Precision and Bias7.1 This test method is adopted from the procedures of theAmerican Leather Chem

9、istsAssociation where it has long beenin use and where it was approved for publication before theinclusion of precision and bias statements was mandated. Theoriginal interlaboratory test data are no longer available. Theuser is cautioned to verify by the use of reference materials, ifavailable, that

10、 the precision and bias (or reproducibility) of thistest method is adequate for the contemplated use.8. Keywords8.1 fats and oils; leather; neutral fatty matter1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.08 on Fats

11、and Oils. This testmethod was developed in cooperation with the American Leather Chemists Assn.(Method H 53-1957).Current edition approved April 1, 2006. Published April 2006. Originallyapproved in 1994. Last previous edition approved in 2001 as D 5560 95(2001).2For referenced ASTM standards, visit

12、the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959

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15、ditional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to

16、the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 5560 95 (2006)2