ASTM_E_1833_-_07a_2013e1.pdf

Designation:E183307a(Reapproved 2013)1Standard Practice forSampling of Blister Copper in Cast Form for Determinationof Chemical Composition1This standard is issued under the fixed designation E1833;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()indicates an editorial change since the last revision or reapproval.1NOTESections 6.10 and 7.1.5 were editorially corrected in October 2013.1.Scope1.1 This practice describes a procedure for the sampling andsample preparation of cast blister copper for the determinationof chemical composition.1.2 This practice is intended to cover the general principlesof sampling applicable to cast blister copper forms.1.3 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 Documents2.1 ASTM Standards:2E135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related Materials3.Terminology3.1 For definitions of terms used in this practice,refer toTerminology E135.3.2 Definitions of Terms Specific to This Standard:3.2.1 lot,nas used in this practice,the unit to be sampled,in pounds or pieces.4.Summary of Practice4.1 Each selected copper piece is drilled by means of acommercial drill press using a34-in.carbide-tipped,or toolsteel drill bit.The speed of sampling shall be so regulated thatexcessive heating,and consequent oxidation,is avoided.Carbide-tipped tools are recommended.Drill cuttings arecollected with a commercial vacuum cleaner and ground in acutter mill.Sample size reduction is accomplished with the useof a riffle and Tyler screens.5.Significance and Use5.1 This practice for sampling of cast blister copper isintended primarily to test such materials for compliance withcompositional specifications.It is assumed that all who usethese methods shall be trained samplers capable of performingcommon sampling procedures skillfully and safely.5.2 The selection of correct test pieces and the preparationof a representative sample from such test pieces are necessaryprerequisites to every analysis.The analytical results will be oflittle value unless the sample represents the average composi-tion of the material from which it was prepared.6.Apparatus6.1 Bucket,plastic sack-lined.6.2 Cards,sampling information.6.3 Center Punch-Spring Steel.6.4 Chalk,blackboard type.6.5 Cutter Mill or Hance Grinder.6.6 Drill Bit,approximately34-in.diameter and a lengthsufficient to penetrate the blister copper form completely.6.7 Drill Press,commercial type,610 rpm.6.8 Electromagnet,hand-held or other permanent magnet.6.9 Hammer,blacksmith type.6.10 Pan,square metal or plastic,approximately 10 in.10in.6.11 Paper,Kraft.6.12 Pulp Sample Sacks.6.13 Riffle,Jones Type,or other of similar design.6.14 Rotap Machine,or similar sieve shaking device.6.15 Template,drilling sequence,Fig.1,Note 1.1This practice is under the jurisdiction of ASTM Committee E01 on AnalyticalChemistry for Metals,Ores,and Related Materials and is the direct responsibility ofSubcommittee E01.05 on Cu,Pb,Zn,Cd,Sn,Be,Precious Metals,theirAlloys,andRelated Metals.Current edition approved Oct.1,2013.Published October 2013.Originallyapproved in 1996.Last previous edition approved in 2007 as E1833 07a.DOI:10.1520/E1833-07AR13E01.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.16 Tyler Screen,20 mesh,12 in.6.17 Tyler Screen,60 mesh,12 in.6.18 V-blender,or similar style mixer.6.19 Vacuum Cleaner,commercial quality.7.Procedure7.1 Sampling:7.1.1 Different parts of a blister copper form may vary incomposition.Asample,therefore,must be taken with care to berepresentative of that form.To obtain a sample representativeof a lot of the product,a number of test pieces should besampled individually.The sample taken should be representa-tive and large enough to suffice for all of the requireddeterminations and reserve material for the settlement ofdisputes.7.1.2 Fit the drilling sequence template to one edge of theblister copper form.The edges of the template should be evenwith the edges of the blister copper form.One corner of thetemplate should be near one corner of the form and theopposite corner should be near the center of the bar.Thetemplate should cover approximately one-quarter of the surfacearea of the blister copper form.7.1.3 Chalk the number one hole,then remove the template.Use the center punch and mark the chalked area for drilling.With