ASTM E934-94(1998)

Standard Specification for Serological Pipet, Disposable Plastic

SCOPE
1.1 This specification describes disposable plastic serological pipets, calibrated "to deliver" when measuring volumes of liquids.  
1.1.1 Any institution or individual who reuses a disposable pipet must bear full responsibility for its safety and effectiveness .

General Information

• Status: Historical
• Publication Date: 09-Oct-1998
• ICS: 11.100 - Laboratory medicine
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

Relations

• Replaced By: ASTM E934-94(2004) - Standard Specification for Serological Pipet, Disposable Plastic
• Effective Date: 01-May-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 934 – 94 (Reapproved 1998)
Standard Specification for
Serological Pipet, Disposable Plastic
This standard is issued under the fixed designation E 934; 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.
1. Scope 5. Design
1.1 This specification describes disposable plastic serologi- 5.1 Shape—0.5, 1.0, and 2.0 cm pipets shall be straight and
cal pipets, calibrated “to deliver” when measuring volumes of of one-piece construction. Any cross section of a pipet taken in
liquids. a plane perpendicular to the longitudinal axis shall be circular.
1.1.1 Any institution or individual who reuses a disposable 5.1.1 Pipets of 5.0, 10.0, 25.0, and 50.0 cm shall be straight
pipet must bear full responsibility for its safety and effective- and may consist of one, two or three components, the extruded
ness. pipet barrel, the pulled or injection molded tip, and the plain,
pulled, or injection molded top end. Any cross section of a
2. Referenced Documents
pipet taken in a plane perpendicular to the longitudinal axis
2.1 ASTM Standards: shall be circular.
D 703 Specification for Polystyrene Molding and Extrusion
5.2 Delivery Tips—Delivery tips shall be made with a
Materials gradual taper of 10 to 40 mm. The tip end shall be reasonably
E 542 Practice for Calibration of Volumetric Ware
perpendicular to the longitudinal axis of the pipet, and shall be
E 920 Specification for Commercially Packaged Laboratory free of internal flash.
3 3
Apparatus
5.3 Top End—The 5, 10, 25.0, and 50.0 cm sizes shall have
E 921 Specification for Export Packaged Laboratory Appa- a top end with an inside diameter of 2 to 6.5 mm for a
ratus
minimum distance of 20 mm from the open end, and shall have
E 1133 Practice for Performance Testing of Packaged Labo- an overall length of 24 to 28 mm. On all sizes, the top end shall
ratory Apparatus for United States Government Procure-
be suitable for plugging with filtering material. The top may be
ments flat or chamfered and must be without sharp outer edges. All
top ends shall be reasonably perpendicular to the longitudinal
3. Terminology
axis of the pipet. The O.D. of top end should range 7 to 9 mm.
3.1 Definitions of Terms Specific to This Standard:
5.4 Dimensions and Outflow Times—The limiting dimen-
3.1.1 accuracy—the expected distribution of mean volumes
sions and outflow times shall be as shown in Table 1. Outflow
around the stated volume.
times shall be determined by means of a stopwatch on
3.1.2 coeffıcient of variation—the expected distribution of
unplugged pipets when using distilled water at 25 6 5°C.
individual volumes around the mean volume.
6. Markings
3.1.3 disposable pipet—such pipets will only be expected to
provide their specified performance during their original use or
6.1 Graduation Markings—Graduation lines shall be be-
operation. tween 0.2 mm and 0.5 mm in width, and in a plane perpen-
dicular to the longitudinal axis of the pipet parallel to each
4. Material and Manufacturer
other. A main graduation line shall extend at least ⁄5 of the way
4.1 The pipets made to this specification shall be fabricated
around the pipet. The values of all main graduation lines shall
from crystal grade, uncolored polystyrene, or regrind of same,
be in Arabic numbers directly above the lines referenced.
as defined in Specification D 703.
Intermediate graduation lines shall extend at least ⁄5of the way
around the pipet, and least graduation lines shall extend at least
⁄8 of the way around the pipet. The zero graduation line shall
This specification is under the jurisdiction of ASTM Committee E-41 on
be at least 90 mm below the top of the pipet on all sides.
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
6.2 Identification Markings—Each pipet shall be marked
Glass and Plastic Apparatus.
Current edition approved Feb. 15, 1994. Published April 1994. Originally with the manufacturer’s or vendor’s name or trademark, its
published as E 934 – 83. Last pr
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