ASTM E728-91(2015)

Standard Test Method for Resistance to Attrition of Granular Carriers and Granular Pesticides

SIGNIFICANCE AND USE
4.1 This procedure was designed principally with granular clay, corncob, nut shell, or sand carriers and granular pesticide products, but need not be limited to these materials. There may be more appropriate test methods for other types of granular carriers and pesticide products.
SCOPE
1.1 This test method is used to determine the resistance to attrition of granular carriers and granular pesticides.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI 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 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: 30-Sep-2015
• ICS: 65.100.01 - Pesticides and other agrochemicals in general
• Technical Committee: E35 - Pesticides, Antimicrobials, and Alternative Control Agents
• Drafting Committee: E35.22 - Pesticide Formulations and Delivery Systems

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E728 − 91 (Reapproved 2015)
Standard Test Method for
Resistance to Attrition of Granular Carriers and Granular
Pesticides
This standard is issued under the fixed designation E728; 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 products, but need not be limited to these materials. There may
be more appropriate test methods for other types of granular
1.1 This test method is used to determine the resistance to
carriers and pesticide products.
attrition of granular carriers and granular pesticides.
1.2 The values stated in inch-pound units are to be regarded
5. Apparatus
as standard. The values given in parentheses are mathematical
5.1 Brushes, Tyler Model 1778-SB soft brass wire brush, or
conversions to SI units that are provided for information only
equivalent, for 100 mesh and coarser sieves.Tyler nylon bristle
and are not considered standard.
brush, or equivalent, for screens finer than 100 mesh.
1.3 This standard does not purport to address all of the
5.2 MechanicalSieveShaker,aTylerRo-Tapsieveshaker,or
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- equivalent, or other agreed upon device.
priate safety and health practices and determine the applica-
5.3 Sieves, U.S. standard sieves, or equivalent conforming
bility of regulatory limitations prior to use. For specific hazard
to Specification E11. The sieves shall be 2 in. (51 mm) in
statements see Section 6.
height and 8 in. (203 mm) in diameter.
2. Referenced Documents
5.4 Bottom Receiver Pan and Top Sieve Cover.
2.1 ASTM Standards:
5.5 Steel Balls, ten ⁄8 in. (16 mm) in diameter.
E11 Specification for Woven Wire Test Sieve Cloth and Test
5.6 Interval Timer, adjustable, with an accuracy of 610 s.
Sieves
E725 Test Method for Sampling Granular Carriers and 5.7 Balance, sensitivity of 0.1 g.
Granular Pesticides
5.8 Beaker, glass, metal, or plastic with 250-mL capacity.
3. Summary of Test Method
6. Hazards
3.1 Aknownweightofpre-sizedgranularcarrierorgranular
6.1 Before testing, read the precautionary statements on the
pesticide is combined with steel balls in a sieve-bottom
product label, the material safety data sheet, or both. Take
receiver pan. After a specified period of mechanical agitation,
proper precautions to prevent skin contact and inhalation of the
the steel balls are removed and the weight of the granular
fines and vapors. Take care to prevent contamination of the
material passing through the specified limiting sieve is mea-
surrounding area. Always wear the appropriate safety equip-
sured and the resistance to attrition calculated.
ment and, where indicated, wear respiratory devices passed by
4. Significance and Use NIOSH for the product being tested.
4.1 This procedure was designed principally with granular
7. Procedure
clay, corncob, nut shell, or sand carriers and granular pesticide
7.1 For reproducible results on a comparative basis, it is
necessary to use a narrow mesh fraction or cut for this test.
This test method is under the jurisdiction of ASTM Committee E35 on
Approximately 75 6 5 g of a representative sample as defined
Pesticides, Antimicrobials, and Alternative Control Agentsand is the direct respon-
sibility of Subcommittee E35.22 on Pesticide Formulations and Delivery Systems.
in Test Method E725 is required for each test and duplication
Current edition approved Oct. 1, 2015. Published February 2016. Originally
is recommended.
approvedin1980.Lastpreviouseditionapprovedin2009asE728 – 91(2009).DOI:
10.1520/E0728-91R15.
7.2 Select the limiting screen for the mesh of materia
...

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: E728 − 91 (Reapproved 2009) E728 − 91 (Reapproved 2015)
Standard Test Method for
Resistance to Attrition of Granular Carriers and Granular
Pesticides
This standard is issued under the fixed designation E728; 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 resistance to attrition of granular carriers and granular pesticides.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI 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 and health practices and determine the applicability of regulatory
limitations prior to use. For specific hazard statements see Section 6.
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
3. Summary of Test Method
3.1 A known weight of pre-sized granular carrier or granular pesticide is combined with steel balls in a sieve-bottom receiver
pan. After a specified period of mechanical agitation, the steel balls are removed and the weight of the granular material passing
through the specified limiting sieve is measured and the resistance to attrition calculated.
4. Significance and Use
4.1 This procedure was designed principally with granular clay, corncob, nut shell, or sand carriers and granular pesticide
products, but need not be limited to these materials. There may be more appropriate test methods for other types of granular carriers
and pesticide products.
5. Apparatus
5.1 Brushes, Tyler Model 1778-SB soft brass wire brush, or equivalent, for 100 mesh and coarser sieves. Tyler nylon bristle
brush, or equivalent, for screens finer than 100 mesh.
5.2 Mechanical Sieve Shaker, a Tyler Ro-Tap sieveshaker, or equivalent, or other agreed upon device.
5.3 Sieves, U.S. standard sieves, or equivalent conforming to Specification E11. The sieves shall be 2 in. (51 mm) in height and
8 in. (203 mm) in diameter.
5.4 Bottom Receiver Pan and Top Sieve Cover.
5.5 Steel Balls, ten ⁄8 in. (16 mm) in diameter.
5.6 Interval Timer, adjustable, with an accuracy of 610 s.
5.7 Balance, sensitivity of 0.1 g.
5.8 Beaker, glass, metal, or plastic with 250-mL capacity.
This test method is under the jurisdiction of ASTM Committee E35 on Pesticides, Antimicrobials, and Alternative Control Agentsand is the direct responsibility of
Subcommittee E35.22 on Pesticide Formulations and Delivery Systems.
Current edition approved Oct. 1, 2009Oct. 1, 2015. Published November 2009February 2016. Originally approved in 1980. Last previous edition approved in 20042009
ε1
as E728 – 91(2004)(2009). . DOI: 10.1520/E0728-91R09.10.1520/E0728-91R15.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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E728 − 91 (2015)
6. Hazards
6.1 Before testing, read the precautionary statements on the product label, the material safety data sheet, or both. Take proper
precautions to prevent ski
...