ASTM E969-02(2019)
(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.
Note 1: Specifications for micropipets are given in Specification E193.
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.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:E969 −02 (Reapproved 2019)
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.
1. Scope 3.2 Calibration—Pipets shall be calibrated to deliver (sym-
bolTD)theintendedcapacityat20 °C.Thepipetshallbefilled
1.1 This specification covers volumetric pipets of two
about 20 mm above the capacity line. The water is lowered
classes. ClassA, Precision Pipet and Class B, General Purpose.
slowly to the capacity line. Delivery of the contents into a
NOTE 1—Specifications for micropipets are given in Specification
receiving vessel is made with the tip in contact with the wall of
E193.
the vessel and no after-drainage period is allowed. Accuracy
1.2 Product with a stated capacity not listed in this standard
shall be within the limits specified in Table 1.
may be specified class A tolerance when product conforms to
the tolerance range of the next smaller volumetric standard
4. Design
product listed in Table 1.
4.1 Shape—The pipets shall consist in general of a suction
1.3 This international standard was developed in accor-
tube and a delivery tube separated by a bulb; all three parts
dance with internationally recognized principles on standard-
shall be permanently attached together. Any cross-section of
ization established in the Decision on Principles for the
the pipet taken in a plane perpendicular to the longitudinal axis
Development of International Standards, Guides and Recom-
shall be circular. The shape shall permit complete emptying
mendations issued by the World Trade Organization Technical
and thorough cleaning.
Barriers to Trade (TBT) Committee.
4.1.1 Bulb—The shape shall permit complete emptying
without any hold up, and easy cleaning.
2. Referenced Documents
4.2 Dimensions—Thelengthofthesuctiontubeshallbe150
2.1 ASTM Standards:
to190mmandtheminimumwallthicknessofbothsuctionand
E193 Specification for Laboratory Glass Micropipets
delivery tubes shall be 0.90 mm. Pipets must comply with the
E438 Specification for Glasses in Laboratory Apparatus
essential dimensions given in Table 1.
E920 Specification for Commercially Packaged Laboratory
4.3 Delivery Tips—Delivery tips shall be made with a
Apparatus
gradual taper of 1.5 to 3 cm. The end of the tip shall be
E921 Specification for Export Packaged Laboratory Appa-
perpendicular to the longitudinal axis of the tip. The outside
ratus
edge of the tip may be bevelled slightly and the end and the
E1133 Practice for Performance Testing of Packaged Labo-
bevel shall be ground or fire-polished. Sudden constriction at
ratory Apparatus for United States Government Procure-
the orifice would impair smooth flow characteristics of the
ments
delivery stream and is not acceptable.
E1157 Specification for Sampling and Testing of Reusable
4.3.1 Tempered Tips—May be supplied at option of manu-
Laboratory Glassware
facturer. The tempered tip, when tested in index oil which
3. General Requirements
matches the refractive index of the glass being used, shall have
a temper between 75 and 220 nm (millimicrons).
3.1 Borosilicate Glass—Borosilicate glass for pipets shall
conform to the glass requirements of Type 1, Class A or B of
4.4 Markings—All markings shall be permanent and leg-
Specification E438.
ible.
4.4.1 Capacity Line—The capacity line shall be a sharply
This specification is under the jurisdiction of ASTM Committee E41 on
defined line of uniform width (maximum 0.6 mm) in a plane
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
perpendicular to the vertical axis of the pipet. The line shall be
Laboratory Ware and Supplies.
appliedbyoneofthefollowingmethods:etchedandfilledwith
Current edition approved July 1, 2019. Published August 2019. Originally
a permanent pigment; etched through a vertical colored stripe
approvedin1983.Lastpreviouseditionapprovedin2012asE969 – 02(2012).DOI:
10.1520/E0969-02R19.
fusedintot
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