1、Designation: E732 80 (Reapproved 2011)Standard Specification forDisposable Pasteur-Type Pipet1This standard is issued under the fixed designation E732; 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 () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers requirements for four types of
3、glass disposable bacteriological (Pasteur type) nonvolumetricpipets suitable for replicate dispensing of drops of solutionsand suspensions for laboratory purposes.2. Referenced Documents2.1 ASTM Standards:2E438 Specification for Glasses in Laboratory Apparatus3. Terminology3.1 Definition of Term Spe
4、cific to This Standard:3.1.1 disposable pipetsin accordance with this specifica-tion and the expected product performance expressed in thisstandard, those pipets which are to be used one time only. Anyinstitution or individual who reuses a disposable pipet mustbear full responsibility for its safety
5、 and effectiveness.4. Classification4.1 Pipets covered by this specification shall be of thefollowing types according to size:Type I534 in. (approximately 150 mm) longType II9 in. (approximately 230 mm) longType IIILarge-tip pipet 534 in. (approximately 150 mm)longType IVJumbo pipet 534 in. (approxi
6、mately 150 mm) long5. Workmanship, Finish, and Appearance5.1 The pipets shall be free of obstructions, visible defects,irregularities, striae, bubbles, and other defects that detractfrom appearance and impair their serviceability.5.2 The pipets shall be visibly clean and ready for use; freeof grease
7、, dirt, grit, oil, or oily type substances readiblydetectable to the naked eye under normal room lighting.5.3 Pipets shall be straight and concentric to the extent thatwhen rolled on a plane surface the tip of the pipet shall nottouch the surface.5.4 Pipets shall be of sufficient strength and unifor
8、mity ofwall thickness to withstand normal usage and transporation.6. Requirements6.1 MaterialThe pipets shall be made of good quality,clear glass conforming to the requirements of Type I, Class Aor B (borosilicate), or Type II (soda lime), of SpecificationE438.6.2 Design and DimensionsThe pipets sha
9、ll be of aone-piece glass construction and meet the dimensions andtolerance outlined in Table 1. The pipets may be fabricatedwith a constriction to allow for cotton-plugging, which shall beconsidered an optional feature at the discretion of the manu-facturer. The top of the pipet shall be fire-polis
10、hed, free ofsharp edges, and be finished approximately 90 deg to the axisof the pipet. The tip of the pipet shall be cut approximately 90to the axis and shall not be cracked or have jagged ends orchips that enter the bore of the pipet.NOTE 1A manufacturer may at his option make claims of drops percu
11、bic centimetre on Type III, the large-tip pipet.7. Keywords7.1 disposable; glass; pasteur; pipet1This specification is under the jurisdiction of ASTM Committee E41 onLaboratory Apparatus and is the direct responsibility of Subcommittee E41.01 onApparatus.Current edition approved Dec. 1, 2011. Publis
12、hed December 2011. Originallyapproved in 1980. Last previous edition approved in 2006 as E732 80 (2006) DOI:10.1520/E0732-80R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informatio
13、n, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item
14、 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 revision at any time by the responsible technical commi
15、ttee 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. Your comments will receive careful consideration at a me
16、eting 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 copyrighted by ASTM International, 100 Barr Harbor Drive,
17、 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)
18、. Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 1 General Form of Glass Disposable Pasteur PipetsTABLE 1 DimensionsTypeOverall Length,mm ABody Length,mm BBody OutsideDiameter, mmBody WallThickness,min, mmDistance Top toConstriction,mm CInside Diameterof Tip, mmI 150 6 10 98 6 57.06 0.5 0.50 25 + 0, 5 1.1 6 0.4II 230 6 10 98 6 6 0.5 0.50 25 + 0, 5 1.1 6 0.4III 150 6 10 108 6 57.06 0.5 0.50 25 + 0, 5 1.7 6 0.3IV 150 6 10 95 6 5956 0.5 0.50 N/A 1.5 6 0.5E732 80 (2011)2
