ASTM E969-02(2007)
(Specification)Standard Specification for Glass Volumetric (Transfer) Pipets
Standard Specification for Glass Volumetric (Transfer) Pipets
ABSTRACT
This specification covers volumetric pipets of two classes. Class A, Precision Pipet and Class B, General Purpose. Borosilicate glass for pipets shall conform to the glass requirements specified. Pipets shall be calibrated to deliver the intended capacity. The pipets shall consist in general of a suction tube and a delivery tube separated by a bulb; all three parts shall be permanently attached together. All markings shall be permanent and legible.
SCOPE
1.1 This specification covers volumetric pipets of two classes. Class A, Precision Pipet and Class B, General Purpose. Specifications for micropipets are given in Specification E 193.
1.2 Product with a stated capacity not listed in this standard may be specified class A tolerance when product conforms to the tolerance range of the next smaller volumetric standard product listed in Table 1.
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Designation:E969 −02(Reapproved 2007)
Standard Specification for
Glass Volumetric (Transfer) Pipets
This standard is issued under the fixed designation E969; 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 (´) 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 receiving vessel is made with the tip in contact with the wall of
the vessel and no after-drainage period is allowed. Accuracy
1.1 This specification covers volumetric pipets of two
shall be within the limits specified in Table 1.
classes. ClassA, Precision Pipet and Class B, General Purpose.
NOTE 1—Specifications for micropipets are given in Specification
4. Design
E193.
4.1 Shape—The pipets shall consist in general of a suction
1.2 Product with a stated capacity not listed in this standard
tube and a delivery tube separated by a bulb; all three parts
may be specified class A tolerance when product conforms to
shall be permanently attached together. Any cross-section of
the tolerance range of the next smaller volumetric standard
the pipet taken in a plane perpendicular to the longitudinal axis
product listed in Table 1.
shall be circular. The shape shall permit complete emptying
and thorough cleaning.
2. Referenced Documents
4.1.1 Bulb—The shape shall permit complete emptying
2.1 ASTM Standards:
without any hold up, and easy cleaning.
E193 Specification for Laboratory Glass Micropipets
E438 Specification for Glasses in Laboratory Apparatus 4.2 Dimensions—Thelengthofthesuctiontubeshallbe150
E920 Specification for Commercially Packaged Laboratory to190mmandtheminimumwallthicknessofbothsuctionand
Apparatus delivery tubes shall be 0.90 mm. Pipets must comply with the
E921 Specification for Export Packaged Laboratory Appa- essential dimensions given in Table 1.
ratus
4.3 Delivery Tips—Delivery tips shall be made with a
E1133 Practice for Performance Testing of Packaged Labo-
gradual taper of 1.5 to 3 cm. The end of the tip shall be
ratory Apparatus for United States Government Procure-
perpendicular to the longitudinal axis of the tip. The outside
ments
edge of the tip may be bevelled slightly and the end and the
E1157 Specification for Sampling and Testing of Reusable
bevel shall be ground or fire-polished. Sudden constriction at
Laboratory Glassware
the orifice would impair smooth flow characteristics of the
delivery stream and is not acceptable.
3. General Requirements
4.3.1 Tempered Tips—May be supplied at option of manu-
3.1 Borosilicate Glass—Borosilicate glass for pipets shall
facturer. The tempered tip, when tested in index oil which
conform to the glass requirements of Type 1, Class A or B of
matches the refractive index of the glass being used, shall have
Specification E438.
a temper between 75 and 220 nm (millimicrons).
3.2 Calibration—Pipets shall be calibrated to deliver (sym-
4.4 Markings—All markings shall be permanent and leg-
bol TD) the intended capacity at 20°C. The pipet shall be filled
ible.
about 20 mm above the capacity line. The water is lowered
4.4.1 Capacity Line—The capacity line shall be a sharply
slowly to the capacity line. Delivery of the contents into a
defined line of uniform width (maximum 0.6 mm) in a plane
perpendicular to the vertical axis of the pipet. The line shall be
This specification is under the jurisdiction of ASTM Committee E41 on
appliedbyoneofthefollowingmethods:etchedand filled with
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
a permanent pigment; etched through a vertical colored stripe
Apparatus.
fusedintotheglass;byapplicationofastainfiredintotheglass
Current edition approved Nov. 1, 2007. Published December 2007. Originally
without etching; or by application of an enamel fired onto the
approved in 1983. Last previous edition approved in 2002 as E969 – 02. DOI:
10.1520/E0969-02R07.
glass without etching. The line shall completely encircle
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E969–95 (Reapproved 1999) Designation: E 969 – 02 (Reapproved 2007)
Standard Specification for
Glass Volumetric (Transfer) Pipets
This standard is issued under the fixed designation E 969; 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
1.1 This specification covers volumetric pipets of two classes. Class A, Precision Pipet and Class B, General Purpose.
NOTE 1—Specifications for micropipets are given in Specification E 193.
1.2 Product with a stated capacity not listed in this standard may be specified class A tolerance when product conforms to the
tolerance range of the next smaller volumetric standard product listed in Table 1.
2. Referenced Documents
2.1 ASTM Standards:
E 193Specification for Micropipets Specification for Laboratory Glass Micropipets
E 438Specification for Glasses in Laboratory Apparatus
E542Practice for Calibration of Volumetric Apparatus
E694Specification for Laboratory Volumetric Apparatus Specification for Glasses in Laboratory Apparatus
E 920 Specification for Commercially Packaged Laboratory Apparatus
E 921 Specification for Export Packaged Laboratory Apparatus
E 1133 Practice for Performance Testing of Packaged Laboratory Apparatus for United States Government Procurements
E 1157 Specification for the Sampling and Testing of Reusable Laboratory Glassware
3. General Requirements
3.1 Borosilicate Glass—Borosilicate glass for pipets shall conform to the glass requirements of Type 1, Class A or B of
Specification E 438.
3.2 Calibration—Pipets shall be calibrated to deliver (symbolTD) the intended capacity at 20°C.The pipet shall be filled about
20 mm above the capacity line. The water is lowered slowly to the capacity line. Delivery of the contents into a receiving vessel
is made with the tip in contact with the wall of the vessel and no after-drainage period is allowed. Accuracy shall be within the
limits specified in Table 1.
4. Design
4.1 Shape—The pipets shall consist in general of a suction tube and a delivery tube separated by a bulb; all three parts shall
be permanently attached together. Any cross-section of the pipet taken in a plane perpendicular to the longitudinal axis shall be
circular. The shape shall permit complete emptying and thorough cleaning.
4.1.1 Bulb—The shape shall permit complete emptying without any hold up, and easy cleaning.
4.2 Dimensions—The length of the suction tube shall be 150 to 190 mm and the minimum wall thickness of both suction and
delivery tubes shall be 0.90 mm. Pipets must comply with the essential dimensions given in Table 1.
4.3 Delivery Tips—Delivery tips shall be made with a gradual taper of 1.5 to 3 cm. The end of the tip shall be perpendicular
to the longitudinal axis of the tip. The outside edge of the tip may be bevelled slightly and the end and the bevel shall be ground
or fire-polished. Sudden constriction at the orifice would impair smooth flow characteristics of the delivery stream and is not
acceptable.
4.3.1 Tempered Tips—May be supplied at option of manufacturer. The tempered tip, when tested in index oil which matches
the refractive index of the glass being used, shall have a temper between 75 and 220 nm (millimicrons).
This specification is under the jurisdiction ofASTM Committee E-41E41 on LaboratoryApparatus and is the direct responsibility of Subcommittee E41.01 onApparatus.
Current edition approved Nov. 10, 1995.1, 2007. Published December 1995.2007. Originally published as E969–83.approved in 1983. Last previous edition
E969–94.approved in 2002 as E 969 – 02.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 14.04.volume information, refer to the standard’s Document Summ
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