1、Designation: E1189 00 (Reapproved 2016)Standard Specification forMicro-Burets (Koch Style)1This standard is issued under the fixed designation E1189; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numb
2、er in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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.1.2 The values stated in SI units
3、are to be regarded asstandard. No other units of measurement are included in thisstandard.2. Referenced Documents2.1 ASTM Standards:2E438 Specification for Glasses in Laboratory ApparatusE675 Specification for Interchangeable Taper-Ground Stop-cocks And StoppersE676 Specification for Interchangeable
4、 Taper-Ground JointsE677 Specification for Interchangeable Spherical GroundJointsE694 Specification for Laboratory Glass Volumetric Appa-ratusE911 Specification for Glass Stopcocks with Polytetrafluo-roethylene (PTFE) PlugsE920 Specification for Commercially Packaged LaboratoryApparatusE921 Specific
5、ation for Export Packaged Laboratory Appa-ratusE1133 Practice for Performance Testing of Packaged Labo-ratory Apparatus for United States Government Procure-mentsE1157 Specification for Sampling and Testing of ReusableLaboratory Glassware3. General Requirements3.1 MaterialBurets shall be made from T
6、ype I, Class A orB glass as specified in Specification E438.3.2 StopcocksBoth burets shall have permanently attachedstopcocks with either glass plugs conforming to SpecificationE675 or PTFE plugs conforming to Specification E911.3.3 Joints and StoppersAll joints and stoppers shall com-ply with the r
7、equirements of Specifications E675, E676,orE677.3.4 GraduationThe graduated section shall be in compli-ance with Pattern I of Specification E694.4. 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 7/2
8、5 joint or a SJ 12/5 joint.4.1.3 Reservoir and graduated section shall be secured toeach other to cushion against 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 s
9、tyle shall be equipped with a detachable tip ofnoble metals (platinum or platinum alloys) sealed to glass in 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 E6
10、77.5. Sampling and Testing5.1 See Specification E1157.6. Packaging6.1 Select one from ASTM Standards: Specifications E920,E921, and Practice E1133.7. Keywords7.1 buret; glass; Koch; laboratory; micro1This specification is under the jurisdiction of Committee E41 on LaboratoryLaboratory Apparatus and
11、is the direct responsibility of Subcommittee E41.01 onLaboratory Ware and Supplies.Current edition approved Sept. 1, 2016. Published September 2016. Originallyapproved in 1987. Last previous edition approved in 2010 as E1189 00 (2010).DOI: 10.1520/E1189-00R16.2For referenced ASTM standards, visit th
12、e 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. U
13、nited States1TABLE 1 Requirements For Style ICapacity,mLScaleLength,mmInsideDiameter,mmOutsideDiameter,mmOutflowTime,AsecondsTolerance, mL1.0 in 0.01 250 to 300 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 7
14、5 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 1TABLE 2 Requirements For Style IICapacity,mLScaleLength,mmInsideDiameter,mmOutsideDiameter,mmOutflowTime,AsecondsTolerance, mL1.0 in 0.01 1
15、35 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 0.01AThe calibration tip shall deliver 100 to 110 drops per mL.E1189 00 (2016)2ASTM International takes no position respecting the validity o
16、f 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 infringement of such rights, are entirely their own responsibility.This standard is subject to
17、 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 International Headquarters.
18、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 to the ASTM Committee on Standards, at the address shown below.This standard is c
19、opyrighted 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 2 Koch Burretts, Style 2E1189 00 (2016)3
