1、Designation: E 1059 91 (Reapproved 2006)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,
2、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 usefu
3、l 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 limitatio
4、ns 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 el
5、ectrodesand 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
6、 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
7、) 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 electr
8、odes; 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 June 1, 2006. Published June 2006. Originallyapproved
9、in 1985. Last previous edition approved in 2001 as E 1059 91 (2001).1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TypeDiameter(Dia) mmominusDegreesMaterialAg-1 4.76 90 Fine SilverAg-2 6.35 90 Fine SilverCu-1 6.0 45 High Purity Copp
10、er RodFe-1 4.76 90 Pure IronFe-2 6.35 90 Pure Iron Drill RodNi-1 4.76 90 Pure NickelNi-2 6.35 90 Pure NickelW-1 6.0 90 Pure TungstenThw-1 2.38 60 2 % Thoriated TungstenThw-2 2.38 15 2 % Thoriated TungstenThw-3 1.5 30 2 % Thoriated TungstenThw-4 6.15 30 2 % Thoriated TungstenThw-5 3.0 30 2 % Thoriate
11、d TungstenNOTE 1All diameter tolerances are 6 .05 mm.FIG. 1 Recommended Shapes and Sizes of Nongraphite Counter ElectrodesE 1059 91 (2006)2FIG. 1 Recommended Shapes and Sizes of Nongraphite Counter Electrodes (continued)E 1059 91 (2006)3ThW-3 ThW-4FIG. 1 Recommended Shapes and Sizes of Nongraphite C
12、ounter Electrodes (continued)FIG. 1 Recommended Shapes and Sizes of Nongraphite Counter Electrodes (continued)E 1059 91 (2006)4ASTM 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
13、expressly advised that determination of the validity of any such patent rights, and the riskof 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 re
14、vised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or 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
15、may attend. If you feel that your comments 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 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).E 1059 91 (2006)5
