ASTM-D4456 Standard Test Methods for Physical and Chemical Properties of Powdered Ion Exchange Resins

ASTM-D4456 - 2017 EDITION - CURRENT
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Scope

1.1 These test methods cover the determination of the physical and chemical properties of powdered ion exchange resins and are intended for use in testing new materials. The following test methods are included:

 

Sections

Test Method A—Particle Size Distribution

5 to 15

Test Method B—Solids Content

16 to 23

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

1.3 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, health and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Significance and Use

7.1 The particle size distribution of powdered ion exchange resins and, more importantly, the derived parameters of mean particle size and percent above and below specified size limits are useful for determining batch to batch variations and, in some cases, can be related to certain aspects of product performance.

7.2 Although automatic multichannel particle size analyzers, of the type described in Section 9, yield information on the entire distribution of sizes present in a given sample, it has been found that, for this application, the numerical value of three derived parameters may adequately describe the particle size characteristics of the samples: the mean particle diameter (in micrometres), the percent of the sample that falls below some size limit, and the percent of the sample that falls above some size limit.

Keywords

floc; ion exchange; particle size; powdered resin; solids content;; ICS Number Code 71.100.40 (Surface active agents)

To find similar documents by ASTM Volume:

11.02 (Water (II))

To find similar documents by classification:

71.100.40 (Surface active agents)

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Document Number

ASTM-D4456-17

Revision Level

2017 EDITION

Status

Current

Modification Type

Revision

Publication Date

Aug. 1, 2017

Document Type

Test Method

Page Count

4 pages

Committee Number

D19.08