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ASTM E726-96

(Test Method)

Standard Test Method for Particle Size Distribution of Granular Carriers and Granular Pesticides

Standard Test Method for Particle Size Distribution of Granular Carriers and Granular Pesticides

SCOPE
1.1 This test method is used to determine the particle size distribution of granular carriers and granular pesticides.  
1.2  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 health practices and determine the applicability of regulatory limitations prior to use.  For specific hazard statements, see Section 6.

General Information

Status
Historical
Publication Date
09-Apr-2001
ICS
19.120 - Particle size analysis. Sieving
Technical Committee
E35 - Pesticides, Antimicrobials, and Alternative Control Agents
Drafting Committee
E35.22 - Pesticide Formulations and Delivery Systems
Current Stage
Ref Project

Relations

Replaced By
ASTM E726-01 - Standard Test Method for Particle Size Distribution of Granular Carriers and Granular Pesticides
Effective Date
10-Apr-2001
Referred By
ASTM E1520-23 - Standard Test Method for Particle Counts Per Pound of Granular Carriers and Dry-Applied Granular Formulations
Effective Date
10-Apr-2001
Referred By
ASTM E642-19 - Standard Practice for Determining Application Rates and Distribution Patterns from Aerial Application Equipment
Effective Date
10-Apr-2001

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ASTM E726-96 - Standard Test Method for Particle Size Distribution of Granular Carriers and Granular PesticidesASTM E726-96 - Standard Test Method for Particle Size Distribution of Granular Carriers and Granular Pesticides
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ASTM E726-96 - Standard Test Method for Particle Size Distribution of Granular Carriers and Granular Pesticides
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: E 726 – 96
Standard Test Method for
Particle Size Distribution of Granular Carriers and Granular
Pesticides
This standard is issued under the fixed designation E 726; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorial changes were made throughout in March 1991.
1. Scope nylon bristle brush (Part No. 8577), or equivalent, for screens
finer than 100 mesh.
1.1 This test method is used to determine the particle size
5.2 Mechanical Sieve Shaker; a Tyler RoTap sieve shaker,
distribution of granular carriers and granular pesticides.
or equivalent, or other agreed upon device.
1.2 This standard does not purport to address all of the
5.3 Sieves; U.S. standard 8-in. (20.3 cm) diameter sieves,
safety concerns, if any, associated with its use. It is the
or equivalent, conforming to Specification E 11.
responsibility of the user of this standard to establish appro-
5.4 Bottom Receiver Pan and Top Sieve Cover.
priate safety and health practices and determine the applica-
5.5 Interval Timer; adjustable, with an accuracy of 610 s.
bility of regulatory limitations prior to use. For specific hazard
5.6 Balance; sensitivity of 0.1 g.
statements, see Section 6.
6. Hazards
2. Referenced Documents
6.1 Before testing, read the precautionary statements on the
2.1 ASTM Standards:
product label, and the Material Safety Data Sheet, or both. Take
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
proper precautions to prevent skin contact and inhalation of the
poses
fines, or the vapors, or both. Take care to prevent contamina-
E 725 Test Method of Sampling Granular Carriers and
tion of the surrounding area. Always wear the appropriate
Granular Pesticides
safety equipment and, where indicated, wear respiratory de-
3. Summary of Test Method
vices approved by NIOSH for the product being tested.
3.1 A known weight of the granular carrier or granular
7. Procedure
pesticide is placed on the top sieve of a stacked set of U.S.
7.1 Clean and stack the specified sieves in order of size with
standard sieves and shaken under standard conditions for a
the pan on the bottom, and the sieve with the largest mesh on
specified period of time. The weight percent of the granules
the top.
retained on each sieve and the bottom pan is determined.
7.2 Use a representative sample of approximately 1006 5g
4. Significance and Use
as defined in Test Method E 725.
7.3 Weigh the sample to 60.1 g.
4.1 This procedure was designed principally for clay, corn-
7.4 Transfer the whole weighed fraction onto the top sieve,
cob, nut shell, or sand granular carriers and granular pesticide
cover and shake for the time given in the product specification
products, but need not be limited to these materials. There may
or 10 min if time is not specified.
be more appropriate test methods for other types of granular
7.5 Remove the sieve assembly from the sieve shaker and,
carriers and products.
using the brush, quantitatively transfer the granular material on
5. Apparatus
the top sieve to a tared weighing pan and weigh to the nearest
0.1 g. Record the value as the sieve f
...

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4.1 The method of powder dispersion in a liquid has a significant effect on the results of a particle size distribution analysis. The analysis will show a too-coarse, unstable, or nonrepeatable distribution if the powder has not been dispersed adequately. It is therefore important that parties wishing to compare their analyses use the same dispersion technique.  
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1.1 This terminology includes all those terms used in all of the standards under the jurisdiction of Subcommittee E29.01. Terms are defined that are related to the manufacture of standard test sieves and screening media, as well as terms related to the methods, analysis, procedures, and equipment for sizing and separating particles.  
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