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ASTM International - ASTM E287-02(2012)

Standard Specification for Laboratory Glass Graduated Burets

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Organization: ASTM International
Publication Date: 1 November 2012
Status: inactive
Page Count: 3
ICS Code (Laboratory ware and related apparatus): 71.040.20
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,
mm

A

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.

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... View More

Document History

July 1, 2019
Standard Specification for Laboratory Glass Graduated Burets
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...
ASTM E287-02(2012)
November 1, 2012
Standard Specification for Laboratory Glass Graduated Burets
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...
November 1, 2007
Standard Specification for Laboratory Glass Graduated Burets
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...
October 10, 2002
Standard Specification for Laboratory Glass Graduated Burets
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...
October 10, 1998
Standard Specification for Laboratory Glass Graduated Burets
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...
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