ASTM E287-02(2012)

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.TABLE 1 Requirements for Burets    
Graduated Scale  
Capacity,
mL  
Subdivision,
mL
Class A
and B  
Class A
Scale Length,
mm
0 to Capacity  
Class B
Scale Length,
mm
0 to Capacity  
Distance, Top
of Buret to “0”
Graduation,
mmA  
Class A
and B
Number
Each, mL  
Class A
Volumetric
Tolerance,
±mL  
Class B
Volumetric
Tolerance,
±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 Using Water    
Length
Graduated,
cm  
Time of Out-
flow Not
Less Than, s  
Length
Graduated,
cm  
Time of Out-
flow Not Less
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
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. See Table 1 and Table 3 for tolerances and dimensional requirements. 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, 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.TABLE 3 Minimum Delivery Time for Class B Buret Using Water    
Capacity, mL  
Time of Outflow Not Less
Than, s  
10  
25  
25  
30  
50  
50  
100  
90
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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2012
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

Relations

• Replaces: ASTM E287-02(2007) - Standard Specification for Laboratory Glass Graduated Burets
• Effective Date: 01-Nov-2012
• Replaced By: ASTM E287-02(2019) - Standard Specification for Laboratory Glass Graduated Burets
• Effective Date: 01-Jul-2019
• Referred By: ASTM D4607-14(2021) - Standard Test Method for Determination of Iodine Number of Activated Carbon
• Effective Date: 01-Nov-2012
• Referred By: ASTM E50-17 - Standard Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
• Effective Date: 01-Nov-2012
• Referred By: ASTM E694-18 - Standard Specification for Laboratory Glass Volumetric Apparatus
• Effective Date: 01-Nov-2012
• Referred By: ASTM D632-12(2020)e1 - Standard Specification for Sodium Chloride
• Effective Date: 01-Nov-2012
• Referred By: ASTM E776-23 - Standard Test Method for Determination of Forms of Chlorine in Refuse-Derived Fuel
• Effective Date: 01-Nov-2012
• Referred By: ASTM D6647-18 - Standard Test Method for Determination of Acid Soluble Iron via Atomic Absorption
• Effective Date: 01-Nov-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E287 −02(Reapproved2012)
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, 2012. Published November 2012. Originally
to the underside of a 3-way stopcock or mounted onto the
approved in 1965. Last previous edition in 2007 as E287 – 02(2007). DOI:
10.1520/E0287-02R12.
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 [e-mail]. 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
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E287−02(Reapproved2012)
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
...