Reproducibility of the Surface Area of Some Powders as Measured by the Monosorb<sup>®</sup> Surface Area Analyzer Using the Brunauer Emmett Teller Equation

Volume 7, Issue 6 (November 1979)

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ISSN: 1945-7553
Page Count: 4

Reproducibility of the Surface Area of Some Powders as Measured by the Monosorb^® Surface-Area Analyzer Using the Brunauer-Emmett-Teller Equation

Ace, HL
Senior technician and head, Physical Testingmember of ASTM, GTE Sylvania, Towanada,Pa.

Parsons, DS
Senior technician and head, Physical Testingmember of ASTM, GTE Sylvania, Towanada,Pa.

Abstract

The precision of the measurement of the specific surface area of powders was studied for 15 different materials. Measurements were obtained in such a way that both instrument and sampling contributions to the total errors could be estimated. The overall coefficient of variation was 6.5%. The instrument reproducibility was 2.7%. The total reproducibility of free-flowing powders was 4.2%, but for non-free-flowing powders, which are hard to sample, the total reproducibility was 8.5%.

Keywords:
powder (particles), fines, area, Brunauer-Emmett-Teller equation, reproducibility, statistics

Paper ID: JTE11510J
DOI: 10.1520/JTE11510J
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Author Title Reproducibility of the Surface Area of Some Powders as Measured by the Monosorb^® Surface-Area Analyzer Using the Brunauer-Emmett-Teller Equation Symposium , 0000-00-00 Committee B09

		SEDL / Journals / Journal of Testing and Evaluation (JTE) / Citation Page Volume 7, Issue 6 (November 1979) Click here to download this paper now for $25 PDF (136K) View License Agreement ISSN: 1945-7553 Page Count: 4 Reproducibility of the Surface Area of Some Powders as Measured by the Monosorb^® Surface-Area Analyzer Using the Brunauer-Emmett-Teller Equation Ace, HL Senior technician and head, Physical Testingmember of ASTM, GTE Sylvania, Towanada,Pa. Parsons, DS Senior technician and head, Physical Testingmember of ASTM, GTE Sylvania, Towanada,Pa. Abstract The precision of the measurement of the specific surface area of powders was studied for 15 different materials. Measurements were obtained in such a way that both instrument and sampling contributions to the total errors could be estimated. The overall coefficient of variation was 6.5%. The instrument reproducibility was 2.7%. The total reproducibility of free-flowing powders was 4.2%, but for non-free-flowing powders, which are hard to sample, the total reproducibility was 8.5%. Keywords: powder (particles), fines, area, Brunauer-Emmett-Teller equation, reproducibility, statistics Paper ID: JTE11510J DOI: 10.1520/JTE11510J ASTM International is a member of CrossRef. Author Title Reproducibility of the Surface Area of Some Powders as Measured by the Monosorb^® Surface-Area Analyzer Using the Brunauer-Emmett-Teller Equation Symposium , 0000-00-00 Committee B09