ASTM E728-91(2004)e1

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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´1
Designation:E728–91(Reapproved 2004)
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.
´ NOTE—Section 7.1 was editorially updated and Keywords were added in October 2004.
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 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Brushes, Tyler Model 1778-SB soft brass wire brush, or
responsibility of the user of this standard to establish appro-
equivalent, for 100 mesh and coarser sieves.Tyler nylon bristle
priate safety and health practices and determine the applica-
brush, or equivalent, for screens finer than 100 mesh.
bility of regulatory limitations prior to use. For specific hazard
5.2 Mechanical Sieve Shaker, a Tyler Ro-Tap sieveshaker,
statements see Section 6.
or equivalent, or other agreed upon device.
2. Referenced Documents 5.3 Sieves, U.S. standard sieves, or equivalent conforming
to Specification E11. The sieves shall be 2 in. (51 mm) in
2.1 ASTM Standards:
height and 8 in. (203 mm) in diameter.
E11 SpecificationforWovenWireTestSieveClothandTest
5.4 Bottom Receiver Pan and Top Sieve Cover.
Sieves
5.5 Steel Balls, ten ⁄8 in. (16 mm) in diameter.
E725 Test Method for Sampling Granular Carriers and
5.6 Interval Timer, adjustable, with an accuracy of 610 s.
Granular Pesticides
5.7 Balance, sensitivity of 0.1 g.
3. Summary of Test Method
5.8 Beaker, glass, metal, or plastic with 250-mL capacity.
3.1 Aknownweightofpre-sizedgranularcarrierorgranular
6. Hazards
pesticide is combined with steel balls in a sieve-bottom
6.1 Before testing, read the precautionary statements on the
receiver pan. After a specified period of mechanical agitation,
product label, the material safety data sheet, or both. Take
the steel balls are removed and the weight of the granular
proper precautions to prevent skin contact and inhalation of the
material passing through the specified limiting sieve is mea-
fines and vapors. Take care to prevent contamination of the
sured and the resistance to attrition calculated.
surrounding area. Always wear the appropriate safety equip-
4. Significance and Use
ment and, where indicated, wear respiratory devices passed by
NIOSH for the product being tested.
4.1 This procedure was designed principally with granular
clay, corncob, nut shell, or sand carriers and granular pesticide
7. Procedure
7.1 For reproducible results on a comparative basis, it is
This test method is under the jurisdiction of ASTM Committee E35 on
necessary to use a narrow mesh fraction or cut for this test.
Pesticides and Alternative Control Agents and is the direct responsibility of
Approximately 75 6 5 g of a representative sample as defined
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, 2004. Published October 2004. Originally
is recommended.
approved in 1980. Last previous edition approved in 1997 as E728 – 91 (1997).
DOI: 10.1520/E0728-91R04E01.
7.2 Select the limiting scre
...