ASTM_E_1059_-_91_2001.pdf

Designation:E 1059 91(Reapproved 2001)Standard Practice forDesignating Shapes and Sizes of Nongraphite CounterElectrodes1This standard is issued under the fixed designation E 1059;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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 practice describes a number of specific nongraphitecounter electrode shapes and sizes that are useful in spectro-chemical analysis.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 safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Terminology2.1 Definition:2.1.1 counter electrodethe electrode,in any analyticalpair,that is used opposite to the self-electrode or supportingelectrode and that is not composed of the specimen to beanalyzed.3.Summary of Practice3.1 The practice designates nongraphite counter electrodesand provides dimensional specifications.4.Significance and Use4.1 This practice is intended as a reference for spectro-chemical methods that utilize nongraphite electrodes.One ofthe electrode shapes in this practice should be employed andreferenced in a method.If this is not possible,the methodshould include the specifications for the electrode used.4.2 This practice should be referenced in a method byincluding a statement such as the following in the section onReagents and Materials:Counter ElectrodeThe electrode shall conform to Type(insert the Type designation from this practice)as shown inPractice E 1059.5.Materials and Dimensions5.1 The materials and dimensions of the counter electrodesare given in Fig.1,along with the tolerances where applicable.5.1.1 The composition of these electrodes,if they have beenestablished,are given in Fig.1.6.Keywords6.1 counter electrodes;electrodes1This practice is under the jurisdiction of ASTM Committee E01 on AnalyticalChemistry for Metals,Ores and Related Materials and is the direct responsibility ofSubcommittee E01.20 on Fundamental Practices.Current edition approved Sept.15,1991.Published November 1991.Originallypublished as E 1059 85.Last previous edition E 1059 85.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.TypeDiameter(Dia)mmominusDegreesMaterialAg-14.7690Fine SilverAg-26.3590Fine SilverCu-16.045High Purity Copper RodFe-14.7690Pure IronFe-26.3590Pure Iron Drill RodNi-14.7690Pure NickelNi-26.3590Pure NickelW-16.090Pure TungstenThw-12.38602%Thoriated TungstenThw-22.38152%Thoriated TungstenThw-31.5302%Thoriated TungstenThw-46.15302%Thoriated TungstenThw-53.0302%Thoriated TungstenNOTE1All diameter tolerances are 6.05 mm.FIG.1 Recommended Shapes and Sizes of Nongraphite Counter ElectrodesE 10592FIG.1 Recommended Shapes and Sizes of Nongraphite Counter Electrodes(continued)E 10593ThW-3ThW-4FIG.1 Recommended Shapes and Sizes of Nongraphite Counter Electrodes(continued)FIG.1 Recommended Shapes and Sizes of Nongraphite Counter Electrodes(continued)E 10594The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard.Users of this standard are expressly advised that determination of the validity of any suchpatent rights,and the risk of infringement 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 for additional standardsand should be addressed to ASTM Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted byASTM,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the above address or at610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).E 10595