ASTM E1044-96

Standard Specification for Glass Serological Pipets (General Purpose and Kahn)

SCOPE
1.1 This specification covers glass serological pipets, used in measuring volumes of liquids.

General Information

• Status: Historical
• Publication Date: 09-Apr-1996
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

Relations

• Replaced By: ASTM E1044-96(2001) - Standard Specification for Glass Serological Pipets (General Purpose and Kahn)
• Effective Date: 10-Apr-1996
• Referred By: ASTM D3606-22 - Standard Test Method for Determination of Benzene and Toluene in Spark Ignition Fuels by Gas Chromatography
• Effective Date: 10-Apr-1996
• Referred By: ASTM E50-17 - Standard Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
• Effective Date: 10-Apr-1996

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.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 1044 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Glass Serological Pipets (General Purpose and Kahn)
This standard is issued under the fixed designation E 1044; 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 ungraduated space of not less than 63 mm between the
lowermost graduation mark and the tip of the pipet. The pipet
1.1 This specification covers glass serological pipets, used
shall be filled about 10 mm above the capacity line. Remove
in measuring volumes of liquids.
any water on the outside of the tip by a downward wipe with
2. Referenced Documents filter paper. Next, place the tip in contact with the wetted wall
of a beaker and slowly lower the meniscus to the capacity line.
2.1 ASTM Standards:
Do not remove any water remaining on the tip at this time.
E 438 Specification for Glasses in Laboratory Apparatus
Delivery of the contents into a receiving vessel is made with
E 542 Practice for Calibration of Volumetric Ware
the tip in contact with the wall of the vessel. When the water
E 671 Specification for Maximum Permissible Thermal Re-
has ceased to flow, the water remaining in the tip is then blown
sidual Stress in Annealed Glass Laboratory Apparatus
out with one firm puff with the tip in contact with the wall of
E 694 Specification for Volumetric Ware
the vessel, if possible. No after-drainage period is allowed.
E 920 Specification for Commercially Packaged Laboratory
Capacity tolerances shall be within the limits given in Table 1.
Apparatus
4.3 Annealing—The maximum residual thermal stress shall
E 921 Specification for Export Packaged Laboratory Appa-
be such as to conform to Specification E 671, except that
ratus
tempered tips or tempered tops, or both, may be supplied at the
E 1133 Practice for Performance Testing of Packaged Labo-
option of the manufacturer. The tempered tip, when examined
ratory Apparatus for United States Government Procure-
in index oil that matches the refractive index of the glass being
ments
used, shall have a temper between 75 and 220 nm.
E 1157 Specification for Sampling and Testing of Reusable
Laboratory Glassware
5. Design
3. Classification
5.1 Shape—The pipets shall be straight and of one-piece
construction. Any cross section of a pipet taken in a plane
3.1 Style and Capacity—Pipets covered by this specification
perpendicular to the longitudinal axis shall be circular.
shall be of the following styles and capacities:
5.2 Delivery Tips—Delivery tips shall be made with a
3.1.1 Style I—General purpose top end.
gradual taper of 15 to 30 mm for capacities up to 5 mL
3.1.2 Style II—Cotton plugging top end.
inclusive, and 20 to 35 mm for 10 and 25 mL capacity pipets.
3.1.3 Style III—Cotton plugging top end, large tip opening.
The end of the tip shall be perpendicular to the longitudinal
3.1.4 Capacities (mL)—0.1; 0.1 (Kahn); 0.2; 0.2 (Kahn);
axis of the pipet. Sudden constriction at the orifice shall not be
0.25 (Kahn); 0.5; 0.60 (Kahn); 1.0; 2.0; 5.0; 10.0; and 25.0.
acceptable. The outside edge of the tip shall be bevelled
4. General Requirements
slightly at the end, and the bevel shall be ground or firepol-
ished.
4.1 Borosilicate Glass—Borosilicate glass for pipets shall
5.3 Zero Graduation Line Position—The distance from the
conform to the glass requirements of Type 1, Class A or B of
top end to the top graduation of all pipets (except for 0.5 mL
Specification E 438.
and Kahn pipets) shall be not less than 100 mm nor more than
4.2 Calibration—Pipets shall be calibrated in accordance
150 mm from the zero graduation line; for 0.5 mL and Kahn
with Practice E 542 to deliver (TD) the intended capacity of
pipets this distance shall be not less than 90 mm nor more than
distilled water at 20°C when the last drop is blown out, except
150 mm.
the 0.25 mL Kahn pipet; this Kahn pipet shall have a clear
5.4 Dimensions and Outflow Times—The limiting dimen-
sions and outflow times shall be as shown in Table 1. Outflow
times shall be determined on unplugge
...