Logo

ASTM D1993-91(1997)

Historical Reaffirmation

Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption

$83.00

$83.00

$149.40


Sub Total (1 Item(s))

$ 0.00

Estimated Shipping

$ 0.00

Total (Pre-Tax)

$ 0.00


Stay effortlessly up-to-date with the latest standard revisions. When new versions are released, they're automatically charged and delivered to you, ensuring seamless compliance.

...

1.1 This test method covers a procedure which is used to measure the surface area of precipitated hydrated silicas by the conventional Brunauer, Emmett, and Teller (BET) theory of multilayer gas adsorption behavior using multipoint determinations, similar to that used for carbon black in Test Methods D4820. This test method specifies the sample preparation and treatment, instrument calibrations, required accuracy and precision of experimental data, and calculations of the surface area results from the obtained data.

1.2 This test method is used to determine the nitrogen surface area of precipitated silicas with specific surface areas in the range of 1 to 50 hm /kg (10 to 500 m2/g).

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.> The minimum safety equipment should include protective gloves, sturdy eye and face protection, and means to deal safely with accidental mercury spills.


SDO ASTM: ASTM International
Document Number D1993
Publication Date May 10, 1997
Language en - English
Page Count 6
Revision Level 91(1997)
Supercedes
Committee D11.20
Publish Date Document Id Type View
Oct. 1, 2022 D1993-22 Revision
June 1, 2018 D1993-18 Revision
Nov. 1, 2013 D1993-03R13E01 Revision
Jan. 10, 2003 D1993-03 Revision
Nov. 1, 2013 D1993-03R13 Reaffirmation
July 1, 2008 D1993-03R08 Reaffirmation
May 10, 1997 D1993-91R97 Reaffirmation