ASTM-E287 2012

$35.75

E287-02(2012) Standard Specification for Laboratory Glass Graduated Burets

Published By	Publication Date	Number of Pages
ASTM	2012	3

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Categories: 71.040.20 - Laboratory ware and related apparatus, ASTM

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Description

ASTM E287-02-Reapproved2012

Historical Standard: Standard Specification for Laboratory Glass Graduated Burets

ASTM E287

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

^A Straight burets only, not applicable to self-zeroing burets.

TABLE 2 Minimum Delivery Time for Class A Burets Using Water

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

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.

Keywords

burets; glass; graduated

ICS Code

ICS Number Code 71.040.20 (Laboratory ware and related apparatus)

DOI: 10.1520/E0287-02R12

Additional information


35	60
25	0.1
15	30
Capacity, mL	Time of Outflow Not Less Than, s
100	90
Length Graduated, cm	Time of Out- flow Not Less Than, s
50	50
40	70
30	50
10	25
20	35
ICS Codes	71.040.20 - Laboratory ware and related apparatus