ASTM E287-02(2007)
(Specification)Standard Specification for Laboratory Glass Graduated Burets
Standard Specification for Laboratory Glass Graduated Burets
ABSTRACT
This specification covers requirements for glass burets of precision and general-purpose grades suitable for laboratory use. Burets are classified as: class A - precision grade buret, and class B - general purpose burets. Burets shall be calibrated to deliver the intended volume at 20°C. No after-drainage period is allowed. Self-zeroing burets shall have an ungraduated, tapered, interior extension that terminates with an overflow orifice. Burets may be equipped with a filling tube. All burets shall have permanently attached stopcocks. The stopcock's handle shall be located to the right. Stopcock plugs shall be provided with a retaining device.
SCOPE
1.1 This specification covers requirements for glass burets of precision and general-purpose grades suitable for laboratory use.
1.1.1 Class A Each buret of precision grade may be marked with the letter "A" to signify compliance with applicable construction and accuracy requirements in Table 1 and Table 2 . Each buret may be marked with a permanent serial number at the option of the manufacturer.
1.1.2 Class B General purpose burets are of the same basic design as Class A burets. However, volumetric tolerances for Class B burets shall be within twice the specified range allowed for Class A burets. These burets need not be marked with their class designation or serial number. SeeTable 1 and Table 3 for tolerances and dimensional requirements. Note 1The Twelfth General (International) Conference on Weights and Measures redefined the litre as a "special name for the cubic decimetre," but agreed to permit continuance of the terms litre, millilitre, and mL, except in association with measurements of the highest precision. For volumetric glassware the difference between the old and new meanings of litre is negligible. Therefore, either mL or cm3 may be marked on ware covered by this standard.
1.1.3 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:E287 −02(Reapproved2007)
Standard Specification for
Laboratory Glass Graduated Burets
This standard is issued under the fixed designation E287; 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 roethylene (PTFE) Plugs
E920 Specification for Commercially Packaged Laboratory
1.1 This specification covers requirements for glass burets
Apparatus
of precision and general-purpose grades suitable for laboratory
E921 Specification for Export Packaged Laboratory Appa-
use.
ratus
1.1.1 Class A—Each buret of precision grade may be
E1133 Practice for Performance Testing of Packaged Labo-
marked with the letter “A” to signify compliance with appli-
ratory Apparatus for United States Government Procure-
cable construction and accuracy requirements in Table 1 and
ments
Table 2. Each buret may be marked with a permanent serial
E1157 Specification for Sampling and Testing of Reusable
number at the option of the manufacturer.
Laboratory Glassware
1.1.2 Class B—Generalpurposeburetsareofthesamebasic
design as Class A burets. However, volumetric tolerances for
3. General Requirements
ClassBburetsshallbewithintwicethespecifiedrangeallowed
for ClassAburets. These burets need not be marked with their
3.1 Calibration—Burets shall be calibrated to deliver the
class designation or serial number. See Table 1 and Table 3 for
intended volume at 20°C. No after-drainage period is allowed.
tolerances and dimensional requirements.
Volumetric tolerances shall be within the limits specified in
Table 1.
NOTE 1—The Twelfth General (International) Conference on Weights
and Measures redefined the litre as a “special name for the cubic
decimetre,” but agreed to permit continuance of the terms litre, millilitre,
4. Design
and mL, except in association with measurements of the highest precision.
For volumetric glassware the difference between the old and new
4.1 Shape—Thisspecificationcovers10,25,50and100-mL
meanings of litre is negligible. Therefore, either mL or cm may be
straight burets with single-bore stopcock; 10, 25, 50 and
marked on ware covered by this standard.
100-mL straight burets with 3-way stopcock; 100-mL burets
1.1.3 Product with a stated capacity not listed in this
with 50-mL bulb (intermediate bulb style); and 10, 25, 50 and
standard may be specified Class A Tolerance when product
100-mL self-zeroing burets.
conforms to the tolerance range of the next smaller volumetric
4.1.1 Self-zeroing burets shall have an ungraduated,
standard product listed in Table 1.
tapered, interior extension that terminates with an overflow
orifice. The exterior of the buret shall extend reasonably
2. Referenced Documents
beyond the terminal point of the interior overflow orifice. An
2.1 ASTM Standards:
exterior outlet tube positioned below the overflow orifice shall
D664 Test Method for Acid Number of Petroleum Products
also be provided for drainage of overflow. End of outlet tube
by Potentiometric Titration
shallbeslightlyenlargedandbulbousforattachmenttoflexible
E675 Specification for Interchangeable Taper-Ground Stop-
tubing.
cocks And Stoppers
4.1.2 A cross section of the graduated portion of all buret
E911 Specification for Glass Stopcocks with Polytetrafluo-
styles taken in a plane perpendicular to their longitudinal axis
shall be circular.
4.2 Filling Tube—Burets may be equipped with a filling
This specification is under the jurisdiction of ASTM Committee E41 on
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
tube as described below.
Apparatus.
4.2.1 ForClassAburets,fillingtubesmayeitherbeattached
Current edition approved Nov. 1, 2007. Published December 2007. Originally
to the underside of a 3-way stopcock or mounted onto the
approved in 1965. Last previous edition in 2002 as E287 – 02. DOI: 10.1520/
E0287-02R07.
lower ungraduated body of those burets having straight bore
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
stopcocks. Filling tubes which are mounted onto the body of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ClassAburetsmustutilizeaseparatestopcockintegralwiththe
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. filling tube. When a separate stopcock is used, positioning of
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E287−02(2007)
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 to “0” and B Volumetric Volumetric
mL Class A mm mm Graduation, Number Tolerance, Tolerance,
A
and B 0 to Capacity 0 to Capacity mm Each, mL ±mL ±mL
10 0.05 350 to 450 250 to 450 30 to 75 0.5 0.02 0.04
25 0.1 350 to 450 250 to 450 30 to 75 1 0.03 0.06
50 0.1 500 to 600 500 to 600 40 to 100 1 0.05 0.10
100 0.2 550 to 650 550 to 650 40 to 100 2 0.10 0.20
A
Straight burets only, not applicable to self-zeroing burets.
TABLE 2 Minimum Delivery Time for Class A Burets
4.5 Delivery Stems—The delivery stem shall have a total
Using Water
length of 70 6 5 mm, except for the 10-mL size which may
Length Time of Out- Length Time of Out-
have a stem 100 to 130 mm long (to comply with Test Method
Graduated, flow Not Graduated, flow Not Less
D664).Thestemshallbepermanentlyattachedtotheburetand
cm Less Than, s cm
...
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:E287–94 (Reapproved 1998) Designation: E 287 – 02 (Reapproved 2007)
Standard Specification for
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
1.1 This specification covers requirements for glass burets of precision and general-purpose grades suitable for laboratory use.
1.1.1 Class A—Each buret of precision grade may be marked with the letter “A” to signify compliance with applicable
construction and accuracy requirements in Table 1 and Table 2. Each buret may be marked with a permanent serial number at the
option of the manufacturer.
1.1.2 Class B—General purpose burets are of the same basic design as ClassAburets. However, volumetric tolerances for Class
B burets shall be within twice the specified range allowed for Class A burets. These burets need not be marked with their class
designation or serial number. See Table 1 and Table 3 for tolerances and dimensional requirements.
NOTE 1—TheTwelfth General (International) Conference onWeights and Measures redefined the litre as a “special name for the cubic decimetre,” but
agreed to permit continuance of the terms litre, millilitre, and mL, except in association with measurements of the highest precision. For volumetric
glassware the difference between the old and new meanings of litre is negligible. Therefore, either mL or cm may be marked on ware covered by this
standard.
1.1.3 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:
D 664Test Method for Neutralization Number by Potentiometric Titration
E438Specification for Glasses in Laboratory Apparatus
E542Practice for Calibration of Volumetric Ware Test Method for Acid Number of Petroleum Products by Potentiometric
Titration
E 675Specification for Interchangeable Taper-Ground Stopcocks and Stoppers
E694Specification for Volumetric Ware Specification for Interchangeable Taper-Ground Stopcocks And Stoppers
E 911 Specification for Glass Stopcocks with Polytetrafluoroethylene (PTFE) Plugs
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 Sampling and Testing of Reusable Laboratory Glassware
3. General Requirements
3.1 Calibration—Burets shall be calibrated to deliver the intended volume at 20°C. No after-drainage period is allowed.
Volumetric tolerances shall be within the limits specified in Table 1.
4. Design
4.1 Shape—This specification covers 10, 25, 50 and 100-mL straight burets with single-bore stopcock; 10, 25, 50 and 100-mL
straight burets with 3-way stopcock; 100-mL burets with 50-mL bulb (intermediate bulb style); and 10, 25, 50 and 100-mL
self-zeroing burets.
4.1.1 Self-zeroing burets shall have an ungraduated, tapered, interior extension that terminates with an overflow orifice. The
exterior of the buret shall extend reasonably beyond the terminal point of the interior overflow orifice. An exterior outlet tube
This specification is under the jurisdiction of ASTM Committee E-41E41 on Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on Glass
Apparatus.
Current edition approved Feb. 15, 1994.Nov. 1, 2007. Published March 1994.December 2007. Originally published as E287–65T.approved in 1965. Last previous edition
E287–83 (1988).in 2002 as E 287 – 02
Annual Book of ASTM Standards, Vol 05.01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E 287 – 02 (2007)
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 to “0” and B Volumetric Volumetric
mL Class A mm mm Graduation, Number Tolerance, Tolerance,
A
and B 0 to Capacity 0 to Capacity mm Each, mL 6mL 6mL
10 0.05 350 to 450 250 to 450 30 to 75 0.5 0.02 0.04
25 0.1 350 to 450 250 to 450 30 to 75 1 0.03 0.06
50 0.1 500 to 600 500 to 600 40 to 100 1 0.05 0.10
100 0.2 550 to 650 550 to 650 40 to 100 2 0.10 0.20
A
Straight burets only, not applicable to self-zeroing burets.
TABLE 2 Minimum Delivery Time for Class A Burets
Using Water
Length Time of Out- Length Time of Out-
Graduated, flow Not Graduated, flow Not Less
cm Less Than, s cm Than, s
15 30 45 80
20 35 50 90
25 40 55 105
30 50 60 120
35 60 65 140
40 70 70 160
TABLE 3 Minimum Delivery Time for Class B Buret
Using Water
Time of Outflow Not Less
Capacity, mL
Than, s
10 25
25 30
50 50
100 90
positioned below the overflow orifice shall also be provided for drainage of overflow. End of outlet tube shall be slightly enlarged
and bulbous for attachment to flexible tubing.
4.1.2 A cross section of the graduated portion of all buret styles taken in a plane perpendicular to their longitudinal axis shall
be circular.
4.2 Filling Tube—Burets may be equipped with a fill
...
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