ASTM E287-02

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Designation: E 287 – 02
Standard Specification for
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Laboratory Glass Graduated Burets
This standard is issued under the fixed designation E 287; 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 E 911 Specification for Glass Stopcocks with Polytetrafluo-
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roethylene (PTFE) Plugs
1.1 This specification covers requirements for glass burets
E 920 Specification for Commercially Packaged Laboratory
of precision and general-purpose grades suitable for laboratory
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Apparatus
use.
E 921 Specification for Export Packaged Laboratory Appa-
1.1.1 Class A—Each buret of precision grade may be
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ratus
marked with the letter “A” to signify compliance with appli-
E 1133 Practice for PerformanceTesting of Packaged Labo-
cable construction and accuracy requirements in Table 1 and
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ratory Apparatus United States Government Procurement
Table 2. Each buret may be marked with a permanent serial
E 1157 Specification for Sampling and Testing Reusable
number at the option of the manufacturer.
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Laboratory Glassware
1.1.2 Class B—Generalpurposeburetsareofthesamebasic
design as Class A burets. However, volumetric tolerances for
3. General Requirements
ClassBburetsshallbewithintwicethespecifiedrangeallowed
3.1 Calibration—Burets shall be calibrated to deliver the
for ClassAburets. These burets need not be marked with their
intended volume at 20°C. No after-drainage period is allowed.
class designation or serial number. See Table 1 and Table 3 for
Volumetric tolerances shall be within the limits specified in
tolerances and dimensional requirements.
Table 1.
NOTE 1—The Twelfth General (International) Conference on Weights
and Measures redefined the litre as a “special name for the cubic
4. Design
decimetre,” but agreed to permit continuance of the terms litre, millilitre,
4.1 Shape—This specification covers 10, 25, 50 and
and mL, except in association with measurements of the highest precision.
100-mL straight burets with single-bore stopcock; 10, 25, 50
For volumetric glassware the difference between the old and new
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and 100-mL straight burets with 3-way stopcock; 100-mL
meanings of litre is negligible. Therefore, either mL or cm may be
marked on ware covered by this standard. burets with 50-mL bulb (intermediate bulb style); and 10, 25,
50 and 100-mL self-zeroing burets.
1.1.3 Product with a stated capacity not listed in this
4.1.1 Self-zeroing burets shall have an ungraduated, ta-
standard may be specified Class A Tolerance when product
pered, interior extension that terminates with an overflow
conforms to the tolerance range of the next smaller volumetric
orifice. The exterior of the buret shall extend reasonably
standard product listed in Table 1.
beyond the terminal point of the interior overflow orifice. An
2. Referenced Documents exterior outlet tube positioned below the overflow orifice shall
also be provided for drainage of overflow. End of outlet tube
2.1 ASTM Standards:
shallbeslightlyenlargedandbulbousforattachmenttoflexible
D 664 Test Method for Neutralization Number by Potentio-
2 tubing.
metric Titration
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4.1.2 A cross section of the graduated portion of all buret
E 438 Specification for Glasses in Laboratory Apparatus
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styles taken in a plane perpendicular to their longitudinal axis
E 542 Practice for Calibration of Volumetric Ware
shall be circular.
E 675 Specification for Interchangeable Taper-Ground
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4.2 Filling Tube—Burets may be equipped with a filling
Stopcocks and Stoppers
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tube as described below.
E 694 Specification for Volumetric Ware
4.2.1 For ClassAburets, filling tubes may either be attached
to the underside of a 3-way stopcock or mounted onto the
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This specification is under the jurisdiction of ASTM Committee E41 on lower ungraduated body of those burets having straight bore
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
stopcocks. Filling tubes which are mounted onto the body of
Apparatus.
ClassAburetsmustutilizeaseparatestopcockintegralwiththe
Current edition approved Oct. 10, 2002. Published November 2002. Originally
filling tube. When a separate stopcock is used, positioning of
published as E 287 – 65T. Last previous edition E 287 – 94 (1998).
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Annual Book of ASTM Standards, Vol 05.01.
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Annual Book of ASTM Standards, Vol 14.04.
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E287–02
TABLE 1 Requirements for Burets
Graduated Scale
Subdivision, Class A Class B Distance, Top Class A Class A Class B
Capacity, mL Scale Length, Scale Length, of Buret
...