1、Designation: E 1189 00 (Reapproved 2005)Standard Specification forMicro-Burets (Koch Style)1This standard is issued under the fixed designation E 1189; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A nu
2、mber 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 specification covers two styles of glass micro-burets of the “Koch” type for general laboratory use.2. Referenced Documents2.1 ASTM
3、 Standards:2E 438 Specification for Glasses in Laboratory ApparatusE 675 Specification for Interchangeable Taper-GroundStopcocks and StoppersE 676 Specification for Interchangeable Taper-GroundJointsE 677 Specification for Interchangeable Spherical GroundJointsE 694 Specification for Laboratory Glas
4、s Volumetric Appa-ratusE911 Specification for Glass Stopcocks with Polytetrafluo-roethylene (PTFE) PlugsE 920 Specification for Commercially Packaged LaboratoryApparatusE 921 Specification for Export Packaged Laboratory Appa-ratusE 1133 Practice for Performance Testing of Packaged Labo-ratory Appara
5、tus for United States Government Procure-mentsE 1157 Specification for Sampling and Testing of ReusableLaboratory Glassware3. General Requirements3.1 MaterialBurets shall be made from Type I, Class A orB glass as specified in Specification E 438.3.2 StopcocksBoth burets shall have permanently at-tac
6、hed stopcocks with either glass plugs conforming to Speci-fication E 675 or PTFE plugs conforming to SpecificationE911.3.3 Joints and StoppersAll joints and stoppers shallcomply with the requirements of Specifications E 675, E 676or E 677.3.4 GraduationThe graduated section shall be in compli-ance w
7、ith Pattern I of Specification E 694.4. Design4.1 Style I:4.1.1 Style I shall be in compliance with Table 1 and Fig. 1.4.1.2 This style shall be equipped with a detachable tip witheither a 7/25 joint or a SJ 12/5 joint.4.1.3 Reservoir and graduated section shall be secured toeach other to cushion ag
8、ainst breakage during transit and inuse. Typical arrangements are a cork spacer and tape or a glassbridge.4.2 Style II:4.2.1 Style II shall be in compliance with Table 2 and Fig.2.4.2.2 This style shall be equipped with a detachable tip ofnoble metals (platinum or platinum alloys) sealed to glass in
9、 aform commonly designated as Shohl-Type.4.2.3 Reservoir section shall be separate from graduatedsection with connection made by a SJ 12/5 spherical groundjoint complying with Specification E 677.5. Sampling and Testing5.1 See Specification E 1157.6. Packaging6.1 Select one from ASTM Standards: Spec
10、ifications E 920,E 921, and Practice E 1133.7. Keywords7.1 buret; glass; Koch; laboratory; micro1This specification is under the jurisdiction of Committee E41 on LaboratoryApparatus and is the direct responsibility of Subcommittee E 41.01 on GlassApparatus.Current edition approved Oct. 1, 2005. Publ
11、ished December 2005. Originallyappoved in 1987. Last previous edition approved in 2000 as E 1189 00.2For 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 Do
12、cument Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TABLE 1 Requirements For Style ICapacity,mLScaleLength,mmInsideDiameter,mmOutsideDiameter,mmOutflowTime,AsecondsTolerance6,mL1.0 in 0.01 250 to 30
13、0 2.1 to 2.3 7.0 to 8.0 35 to 50 0.012.0 in 0.01 250 to 300 2.9 to 3.2 7.5 to 8.5 35 to 50 0.015.0 in 0.02 450 to 550 3.4 to 3.6 7.5 to 8.5 75 to 100 0.025.0 in 0.01 450 to 550 3.4 to 3.6 7.5 to 8.5 75 to 100 0.0110.0 in 0.02 500 to 600 4.6 to 5.0 8.0 to 9.0 95 to 115 0.02FIG. 1 Koch Burretts, Style
14、 1TABLE 2 Requirements For Style IICapacity,mLScaleLength,mmInsideDiameter,mmOutsideDiameter,mmOutflowTime,AsecondsTolerance6,mL1.0 in 0.01 135 to 150 2.9 to 3.2 7.0 to 8.0 25 to 35 0.012.0 in 0.01 250 to 300 2.9 to 3.2 7.0 to 8.0 45 to 75 0.015.0 in 0.01 450 to 550 3.4 to 3.6 7.5 to 8.5 105 to 140
15、0.01AThe calibration tip shall deliver 100 to 110 drops per mL.E 1189 00 (2005)2ASTM 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 val
16、idity 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 revised, either reapproved or withdrawn. Your com
17、ments 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 may attend. If you feel that your comments have
18、 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).FIG. 2 Koch Burretts, Style 2E 1189 00 (2005)3
