1、Designation:D 2077 92(Reapproved 1998)Standard Test Method forAsh in Fatty Quaternary Ammonium Chlorides1This standard is issued under the fixed designation D 2077;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.This test method was prepared jointly by ASTM and the American Oil Chemists Society.1.Scope1.1 This test method covers the determination of th
3、e non-volatile matter remaining after a specimen of fatty quaternaryammonium chloride is completely burned and ignited.1.2 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
4、 safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Apparatus2.1 CrucibleA porcelain or high-silica content glass of250-mL capacity.2.2 Electric Muffle Furnace.2.3 Triangle,Nichrome or clay.3.Procedure3.1 Ignite a crucible in the muffle furnace at 5
5、50 to 600C.Cool slightly,place in a desiccator for 1 h and weigh.Melt thesample if it is not already liquid,in a water bath.Mixthoroughly and weigh 20 g to 0.1 mg into the crucible.Heatgently by moving a flame on the bottom and sides of thecrucible until the specimen ignites.Reduce the size of thefl
6、ame until the heat is just sufficient to keep the specimenburning.Continue the heating of the specimen to a black charand transfer the crucible to the muffle furnace,heat at 550 to600C for 1 h.Remove the crucible from the furnace,coolslightly,place in a desiccator,and cool to room temperature.Weigh
7、and repeat the heating in the muffle furnace to constantweight.4.Calculation4.1 Calculate the percent of ash(Note)as follows:Ash,%5R/S!3 100(1)where:R=residue,g,andS=specimen weight used,g.NOTE1Unless free caustic is found,the ash can be concluded to beessentially sodium chloride.5.Precision and Bia
8、s5.1 Precision and bias were not established at the time thistest method was written.An effort is being made to obtain theprecision and,if obtainable,it will be published in futurerevisons.This test method has been in use for many years,andits usefulness has been well established.6.Keywords6.1 ash;q
9、uaternary ammonium chloridesASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infrin
10、gement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or
11、 for additional 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
12、 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 multiple copies)of this standard may be obtained by contacting ASTM at the a
13、boveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).1This test method is under the jurisdiction of ASTM Committee D-1 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.32 on Drying Oils.Current edition approved March 15,1992.Published May 1992.Originallypublished as D 2077 62 T.Last previous edition D 2077 64(1987).1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.
