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About This Item
Full Description
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)2 theory of multilayer gas adsorption behavior using multipoint determinations, similar to that used for carbon black in Test Method D6556. 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 hm²/kg (10 to 500 m²/g).
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
Document History
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ASTM D1993-22
Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption- Most Recent
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ASTM D1993-18
Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption- Historical Version
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ASTM D1993-03(2013)e1
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Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption- Historical Version
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ASTM D1993-03(2013)
Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption- Historical Version
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ASTM D1993-03(2008)
Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption- Historical Version
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ASTM D1993-03
Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption- Historical Version
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ASTM D1993-91(1997)
Standard Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption- Historical Version