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BS 4359-1:1984

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Determination of the specific surface area of powders Recommendation for gas adsorption (BET) methods

Available format(s)

Hardcopy , PDF

Superseded date

15-04-1996

Language(s)

English

Published date

31-01-1985

€231.38
Excluding VAT

Foreword
Committees responsible
Methods
0 Introduction
1 Scope
2 Definitions
3 Symbols
4 Principle
5 Outgassing
6 Volumetric method
7 Continuous flow method
8 Gravimetric method
9 Reporting
Appendices
A Gas adsorption using gases other than nitrogen
B Single point determination
C Automatic constant level device for liquid nitrogen
D Detailed procedure for volumetric method
E Tabulated data and calculation using volumetric
    method
F Precision of results
G Bibliography
Tables
1 Recording of data and calculation of results
2 Values of the molecular cross-sectional area for
    various adsorptives
Figures
1 Surface reached by adsorption method
2 Surface reached by permeametry method
3 Part of adsorption isotherm showing experimental
    points
4 BET plot corresponding to adsorption isotherm of
    figure 3
5 Arrangement of apparatus for volumetric method
6 Sample bulbs of 10 cm3 volume
7 Gas burette
8 Plot of initial nitrogen pressure against total
    surface area
9 Schematic diagram of apparatus for continuous flow
    method
10 Chart recorder trace of adsorption, desorption,
    calibration and change in gas concentration
11 Sample tubes
12 Chart recorder trace for sample of low surface area
13 Arrangement of spring balance in gravimetric method
14 Dewar bath
15 Constant level device for liquid nitrogen

Recommends three methods, plus the necessary outgassing, for determining the specific surface of a powder by measuring the quantity of gas which would cover the surface with a single layer of adsorbed gas molecules

Committee
LBI/37
DocumentType
Standard
Pages
32
PublisherName
British Standards Institution
Status
Superseded

BS 4359-3:1970 Methods for the determination of specific surface of powders. Calculation from the particle size distribution
BS 4359-2:1982 Determination of the specific surface area of powders Recommended air permeability methods

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