ASTM E1518-99

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Designation:E1518–99
Standard Practice for
Evaluation of Physical Compatibility of Pesticides in
Aqueous Tank Mixtures by the Dynamic Shaker Method
This standard is issued under the fixed designation E 1518; 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.
1. Scope chosen water hardnesses and temperatures. Compatibility is
measured in terms of the dispersion stability and screen
1.1 This practice describes the method for the evaluation of
residue.
the physical compatibility and stability of pesticide tank
3.2 Pesticides being examined for mixing compatibility
mixtures diluted for aqueous application. This practice may
should be evaluated individually as controls.
also be adapted to use with liquid fertilizers in replacement of
the water diluent.
4. Significance and Use
1.2 Tank mix compatibility can be a complex evaluation. A
4.1 This practice is designed for researchers, applicators,
single method or battery of methods will not always indicate
and end users of pesticides where one or more ingredients are
whether a pesticide tank mix will be compatible in the field.
being mixed into an aqueous spray system. The practice is
The method described in this practice is run under dynamic
useful in determining physical compatibility of aqueous spray
conditions.
mixtures of pesticides and/or fertilizers.
1.3 Proper safety and hygiene precautions must be taken
4.2 The practice is not designed to determine physical
when working with pesticide formulations to prevent skin or
compatibility of non-aqueous based spray mixtures.
eye contact, vapor inhalation, and environmental contamina-
4.3 THe results or the testing should be used to determine
tion.
the compatibility of the mixture ingredients in dynamic appli-
1.4 Readandfollowallhandlinginstructionsforthespecific
cations. Interpolation of static results to the expectations of the
formulation and conduct the test in accordance with good
results of this test is not encouraged.
laboratory practice.
1.5 This standard does not purport to address all of the
5. Apparatus
safety problems, if any, associated with its use. It is the
5.1 Graduated Cylinder, 100 mL, glass-stoppered.
responsibility of the user of this standard to establish appro-
5.2 Pipets, graduated, wide tip, serological, various delivery
priate safety and health practices and determine the applica-
volumes.
bility of regulatory limitations prior to use.
5.3 Balance, accurate to 0.1 g.
5.4 Sieve, US Standard, 50 mesh (300 microns), 3-in.
2. Referenced Documents
2 diameter.
2.1 ASTM Standards:
5.5 Wide-Mouth Jars, 4 oz with polyethylene seal cups.
D 1193 Specification for Reagent Water
5.6 Shaker, wrist action, Burrell Model 75 or equivalent.
3. Summary of Practice
6. Reagents
3.1 In this practice, pesticides are diluted in water and tank
6.1 Purity of Reagents—Reagent grade chemicals shall be
mixed at specific application rates. Evaluations are conducted
used in all tests. Unless otherwise indicated, it is intended that
under dynamic conditions. Pesticides are mixed and kept under
all reagents shall conform to the specifications of the Commit-
agitation by a mechanical shaker. Evaluations are conducted at
tee on Analytical Reagents of the American Chemical Society
where such specifications are available. Other grades may be
This practice is under the jurisdiction of ASTM Committee E35 on Pesticides
and is the direct responsibility of Subcommittee E35.22 on Pesticide Formulation
and Application Systems.
Current edition approved March 10, 1999. Published July 1999. Originally Other sieve mesh sizes may be used as defined by field-use applications.
published as E 1508 - 93. Last previous edition E 1508 - 93. “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Standards volume information, refer to the standard’s Document Summary page on Rosin, D. Van Nostrand Co., Inc., New York, NY, and the “United States
the ASTM website. Pharmacopeia.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E1518–99
used, provided it is first ascertained that the reagent is of 7.1.4 Addaspecifiedamount,accordingtotheproductlabel
sufficiently high purity to permit its use without lessening the directions, of each additional pesticide to the jar used in 7.1.2.
accuracy of the determination. Deliver as in Section 7.1.2. After each pesticide addition, cap
6.2 PurityofWater—Unless otherwise indicated, references the jar and swirl sufficiently to disperse the mixture.
to water shall be understood to mean reagent water as defined 7.1.5 Place the jar in the shaker. The jar
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