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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 , 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.
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:
Test Method A—Particle Size Distribution
Test Method B—Solids Content
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2687 Practices for Sampling Particulate Ion-Exchange Materials
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
F322 Test Method for Determining the Quality of Calibration Particles for Automatic Particle Counters
F651 Method for Particle Counter Single-Point Calibration by the Median Method
F658 Practice for Calibration of a Liquid-Borne Particle Counter Using an Optical System Based Upon Light Extinction
ICS Number Code 71.100.40 (Surface active agents)
UNSPSC Code 13111000(Resins)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D4456-17, Standard Test Methods for Physical and Chemical Properties of Powdered Ion Exchange Resins, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top