1、Designation: D5560 95 (Reapproved 2011)Standard Test Method forDetermination of Neutral Fatty Matter Contained in Fats andOils1This standard is issued under the fixed designation D5560; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisio
2、n, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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 do
3、es 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 asstandard. No other units of measurement are included in thisstandard.1.3
4、This standard does not purport to address all of thesafety 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 Docum
5、ents2.1 ASTM Standards:2D5553 Test Method for Determination 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 Reage
6、nts4.1 Erlenmeyer Flask, 125 mL.4.2 Separatory Funnel.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 t
7、o end point using phenolphthaleinindicator. Cool, then 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 tot
8、al neutral oily matter as follows:total neutral oily 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 D5553, and subtract toobtain neutral fatty matter.7. Precision and Bias7.1 This test method is adop
9、ted from the procedures of theAmerican Leather ChemistsAssociation 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 b
10、y the use of reference materials, ifavailable, that 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 di
11、rect responsibility of Subcommittee D31.08 on Fats and Oils. This testmethod was developed in cooperation with the American Leather Chemists Assn.(Method H 53-1957).Current edition approved Jan. 1, 2011. Published March 2011. Originallyapproved in 1994. Last previous edition approved in 2006 as D556
12、0 95(2006).DOI: 10.1520/D5560-95R11.2For referenced ASTM standards, visit 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 Internati
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16、ments have not received a fair hearing you shouldmake your views known to 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
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