ASTM E726-01(2021)

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.
Designation: E726 − 01 (Reapproved 2021)
Standard Test Method for
Particle Size Distribution of Granular Carriers and Granular
Pesticides
This standard is issued under the fixed designation E726; 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 specified period of time. The weight percent of the granules
retained on each sieve and the bottom pan is determined.
1.1 This test method is used to determine the particle size
distribution of granular carriers and granular pesticides.
4. Significance and Use
1.2 The values stated in SI units are to be regarded as
4.1 This procedure was designed principally for clay,
standard. No other units of measurement are included in this
corncob, nut shell, paper, or sand granular carriers and granular
standard.
pesticide products, but need not be limited to these materials.
1.3 This standard does not purport to address all of the
There may be more appropriate test methods for other types of
safety concerns, if any, associated with its use. It is the
granular carriers and products.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5. Apparatus
mine the applicability of regulatory limitations prior to use.
5.1 Brushes; Tyler Part No. 8576 soft brass wire brush, or
For specific hazard statements, see Section 6.
equivalent, for 100 mesh (150 µm) and coarser sieves. Tyler
1.4 This international standard was developed in accor-
nylon bristle brush (Part No. 8577), or equivalent, for screens
dance with internationally recognized principles on standard-
finer than 100 mesh.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5.2 Mechanical Sieve Shaker; a Tyler RoTap sieve shaker,
mendations issued by the World Trade Organization Technical
or equivalent, or other agreed upon device.
Barriers to Trade (TBT) Committee.
5.3 Sieves; U.S. standard 8 in. (20.3 cm) diameter sieves, or
equivalent, conforming to Specification E11.
2. Referenced Documents
5.4 Bottom Receiver Pan and Top Sieve Cover.
2.1 ASTM Standards:
5.5 Interval Timer; adjustable, with an accuracy of 610 s.
E11 Specification for Woven Wire Test Sieve Cloth and Test
Sieves
5.6 Balance; sensitivity of 0.1 g.
E725 Test Method for Sampling Granular Carriers and
Granular Pesticides
6. Hazards
6.1 Before testing, read the precautionary statements on the
3. Summary of Test Method
productlabel,andtheMaterialSafetyDataSheet,orboth.Take
3.1 A known weight of the granular carrier or granular
proper precautions to prevent skin contact and inhalation of the
pesticide is placed on the top sieve of a stacked set of U.S.
fines, or the vapors, or both. Take care to prevent contamina-
standard sieves and shaken under standard conditions for a
tion of the surrounding area. Always wear the appropriate
safety equipment and, where indicated, wear respiratory de-
vices approved by NIOSH for the product being tested.
This test method is under the jurisdiction of ASTM Committee E35 on
Pesticides, Antimicrobials, and Alternative Control Agents and is the direct 7. Procedure
responsibility of Subcommittee E35.22 on Pesticide Formulations and Delivery
7.1 Clean and stack the specified sieves in order of size with
Systems.
Current
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