ASTM E732-80(1996)
(Specification)Standard Specification for Disposable Pasteur-Type Pipet
Standard Specification for Disposable Pasteur-Type Pipet
SCOPE
1.1 This specification covers requirements for four types of glass disposable bacteriological (Pasteur type) nonvolumetric pipets suitable for replicate dispensing of drops of solutions and suspensions for laboratory purposes.
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: E 732 – 80 (Reapproved 1996)
Standard Specification for
Disposable Pasteur-Type Pipet
This standard is issued under the fixed designation E 732; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) 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. Scope 5. Workmanship, Finish, and Appearance
1.1 This specification covers requirements for four types of 5.1 The pipets shall be free of obstructions, visible defects,
glass disposable bacteriological (Pasteur type) nonvolumetric irregularities, striae, bubbles, and other defects that detract
pipets suitable for replicate dispensing of drops of solutions from appearance and impair their serviceability.
and suspensions for laboratory purposes. 5.2 The pipets shall be visibly clean and ready for use; free
of grease, dirt, grit, oil, or oily type substances readibly
2. Referenced Documents
detectable to the naked eye under normal room lighting.
2.1 ASTM Standards:
5.3 Pipets shall be straight and concentric to the extent that
E 438 Specification for Glasses in Laboratory Apparatus when rolled on a plane surface the tip of the pipet shall not
touch the surface.
3. Terminology
5.4 Pipets shall be of sufficient strength and uniformity of
3.1 Definition of Term Specific to This Standard:
wall thickness to withstand normal usage and transporation.
3.1.1 disposable pipets—in accordance with this specifica-
6. Requirements
tion and the expected product performance expressed in this
standard, those pipets which are to be used one time only. Any
6.1 Material—The pipets shall be made of good quality,
institution or individual who reuses a disposable pipet must clear glass conforming to the requirements of Type I, Class A
bear full responsibility for its safety and effectiveness.
or B (borosilicate), or Type II (soda lime), of Specification
E 438.
4. Classification
6.2 Design and Dimensions—The pipets shall be of a
4.1 Pipets covered by this specification shall be of the
one-piece glass construction and meet the dimensions and
following types according to size:
tolerance outlined in Table 1. The pipets may be fabricated
Type I—5 ⁄4 in. (approximately 150 mm) long
with a constriction to allow for cotton-plugging, which shall be
Type II—9 in. (approximately 230 mm) long
considered an optional feature at the discretion of the manu-
Type III—Large-tip pipet
...
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