ASTM-F1368 Test Method for Determining the Sieving Performance of a Fluid Filter Medium Employing an Aqueous Suspension of Microspheres and a Spectrophotometer (Withdrawn 2001)

ASTM-F1368 - 1992 EDITION - CANCELLED
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Test Method for Determining the Sieving Performance of a Fluid Filter Medium Employing an Aqueous Suspension of Microspheres and a Spectrophotometer (Withdrawn 2001)

Scope

1.1 This test method covers thin filter media, especially membranes, in an effort to determine the largest particle a medium may let pass.

1.2 Batches of microspheres are used as test particles where, in any one batch, all of the microspheres are the same size, and, from one batch to the next the diameters range from 0.1 to 2 [mu]m. Filtration efficiency is determined by comparing the optical density of the feed stream to that of the filtrate, during separate filtration tests, with separate batches of microspheres.

1.3 By sieving filtration is meant that adsorptive filtration is minimized. That is, even though the length of the average pore (defined by the flow of fluid) may be a thousand times the diameter, the present procedure strives to minimize the capture of particles by the walls of the pores. To this end the procedure employs a surfactant in the suspension, a high velocity of the liquid, and a high concentration of test particles.

1.4 This procedure excludes those filter media with charged surfaces that are meant to enhance adsorptive filtration.

1.5 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

1.6 The values stated in SI units are to be regarded as the standard.

Keywords

Adsorptive filtration; Colorimetric analysis; Filters/filter procedures; Liquid filtration; Microspheres in liquid filtration; Particle size analysis-filter testing; Performance-filters; Sieve analysis; Sieving filtration; Spectrophotometry; sieving performance of fluid filter medium employing an aqueous; suspension of microspheres and spectrophotometer, test; ICS Number Code 71.040.30 (Chemical reagents)

To find similar documents by ASTM Volume:

14.04 (Laboratory Apparatus; Degradation of Materials; SI; Oxygen Fire Safety)

To find similar documents by classification:

71.040.30 (Chemical reagents Including reference materials)

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This document is available in Paper format.

Document Number

ASTM-F1368-92

Revision Level

1992 EDITION

Status

Cancelled

Modification Type

Withdrawn

Publication Date

Jan. 15, 1992

Document Type

Test Method

Page Count

4 pages

Committee Number

S01.