ASTM E1520-23

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E1520 − 99 (Reapproved 2015) E1520 − 23
Standard Test Method for
Particle Counts Per Pound of Granular Carriers and Dry-
Applied Granular Formulations
This standard is issued under the fixed designation E1520; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method is used to determine the number of particles per pound of granular carriers and granular pesticide
formulations.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 and healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use. For specific precautionary statements, see Section 6.
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
2.1 ASTM Standards:
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E725 Test Method for Sampling Granular Carriers and Granular Pesticides
E726 Test Method for Particle Size Distribution of Granular Carriers and Granular Pesticides
E727/E727M Test Methods for Determining Bulk Density of Granular Carriers and Granular Pesticides
3. Summary of Test Method
3.1 A known weight of the granular carrier or granular pesticide formulation is placed on the top sieve of a stacked set of U.S.
standard stainless steel screens. The sieves are shaken for a specified period of time. The weight percent of the granules retained
on each sieve is determined. The number of particles per pound of granular material is then calculated.
4. Significance and Use
4.1 This test method was designed principally for clay granular carriers and clay-based granular formulations, but need not be
limited to these materials.
This test method is under the jurisdiction of ASTM Committee E35 on Pesticides, Antimicrobials, and Alternative Control Agents and is the direct responsibility of
Subcommittee E35.22 on Pesticide Formulations and Delivery Systems.
Current edition approved Oct. 1, 2015April 1, 2023. Published November 2015May 2023. Originally approved in 1993. Last previous edition approved in 20092015 as
E1520 - 99E1520 – 99 (2015).(2009). DOI: 10.1520/E1520-99R15.10.1520/E1520-23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E1520 − 23
4.2 This procedure is applicable to granules in the range from 8 to 60 mesh (2.36 to 0.256 to 80 mesh (3.36 to 0.17 mm).
4.3 The sieve sizes used to calculate total particle count will be called the desired range and should be specified as part of the test
results.
5. Apparatus
5.1 Mechanical Sieve Shaker, a Tyler RoTap sieve shaker or equivalent.
5.2 Sieves, U.S. standard stainless steel 8-in. diameter sieves conforming to Specification E11.
5.3 Bottom Receiver Pan and Top Sieve Cover.
5.4 Interval Timer, adjustable, with an accuracy of +10 s.
5.5 Balance, sensitivity of 0.01 g.
6. Safety Precautions
6.1 Before testing read the precautionary statements on the product label or the Material Safety Data Sheet (MSDS), or both. Take
proper precautions to prevent skin contact and inhalation of the fines or vapors, or both. Take care to prevent contamination of the
surrounding area. Always wear the appropriate safety equipment and, where indicated, wear respiratory devices approved by
(NIOSH) for the product being tested.
7. Procedure
7.1 Record tare weights of each sieve and bottom pan to 60.01 g.
7.2 Order stack of screens by size with the finest sieve next to the pan.
7.3 Use
...