ASTM E732-80(2001)e1

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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e1
Designation: E 732 – 80 (Reapproved 2001)
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.
e NOTE—Keywords were added editorially October 2001.
1. Scope 5.2 The pipets shall be visibly clean and ready for use; free
of grease, dirt, grit, oil, or oily type substances readibly
1.1 This specification covers requirements for four types of
detectable to the naked eye under normal room lighting.
glass disposable bacteriological (Pasteur type) nonvolumetric
5.3 Pipets shall be straight and concentric to the extent that
pipets suitable for replicate dispensing of drops of solutions
when rolled on a plane surface the tip of the pipet shall not
and suspensions for laboratory purposes.
touch the surface.
2. Referenced Documents
5.4 Pipets shall be of sufficient strength and uniformity of
wall thickness to withstand normal usage and transporation.
2.1 ASTM Standards:
E 438 Specification for Glasses in Laboratory Apparatus
6. Requirements
3. Terminology 6.1 Material—The pipets shall be made of good quality,
clear glass conforming to the requirements of Type I, Class A
3.1 Definition of Term Specific to This Standard:
or B (borosilicate), or Type II (soda lime), of Specification
3.1.1 disposable pipets—in accordance with this specifica-
E 438.
tion and the expected product performance expressed in this
6.2 Design and Dimensions—The pipets shall be of a
standard, those pipets which are to be used one time only. Any
one-piece glass construction and meet the dimensions and
institution or individual who reuses a disposable pipet must
tolerance outlined in Table 1. The pipets may be fabricated
bear full responsibility for its safety and effectiveness.
with a constriction to allow for cotton-plugging, which shall be
4. Classification
considered an optional feature at the discretion of the manu-
facturer. The top of the pipet shall be fire-polished, free of
4.1 Pipets covered by this specification shall be of the
sharp edges, and be finished approximately 90 deg to the axis
following types according to size:
3 of the pipet. The tip of the pipet shall be cut approximately 90
Type I—5 ⁄4 in. (approximately 150 mm) long
deg to the axis and shall not be cracked or have jagged ends or
Type II—9 in. (approximatel
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