ASTM E1518-05(2012)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: E1518 − 05 (Reapproved 2012)
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 E1518; 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 2. Referenced Documents
2.1 ASTM Standards:
1.1 This practice describes the method for the evaluation of
D1193 Specification for Reagent Water
the physical compatibility and stability of pesticide tank
mixtures diluted for aqueous application. This practice may
3. Summary of Practice
also be adapted to use with liquid fertilizers in replacement of
3.1 In this practice, pesticides are diluted in water and tank
the water diluent.
mixed at specific application rates. Evaluations are conducted
1.2 Tank mix compatibility can be affected by many vari-
under dynamic conditions. Pesticides are mixed and kept under
ables. Care should be taken to duplicate test conditions. This
agitation by a mechanical shaker. Evaluations are conducted at
practice addresses the standard variables such as time,
chosen water hardnesses and temperatures. Compatibility is
temperature, water hardness, method of agitation, and degree
measured in terms of the dispersion stability and screen
of agitation.
residue.
1.3 Compatibility is complex and can be affected by other 3.2 Pesticides being examined for mixing compatibility
should be evaluated individually as controls.
variables such as order of addition, pH of the dilution water,
pumping shear, etc. Under the parameters of this practice, the
3.3 Order of Addition—Pesticides should be tank mixed as
results will define whether the pesticide mixture is or is not
recommended on the product label. If the order of the addition
compatible in the laboratory. Compatibility or incompatibility
is not specified, then all possible orders of addition should be
should be confirmed under field spray conditions.
tested. The following is a general guide: (1) waster soluble
concentrates, (2)waterdispersiblegranules(dryflowables), (3)
1.4 Proper safety and hygiene precautions must be taken
wettable powders, (4) liquid flowables, and (5) emulsifiable
when working with pesticide formulations to prevent skin or
concentrates.
eye contact, vapor inhalation, and environmental contamina-
tion.
4. Significance and Use
1.5 Readandfollowallhandlinginstructionsforthespecific
4.1 This practice is designed for researchers, applicators,
formulation and conduct the test in accordance with good
and end users of pesticides where one or more ingredients are
laboratory practice.
being mixed into an aqueous spray system. The practice is
useful in determining physical compatibility of aqueous spray
1.6 The values stated in SI units are to be regarded as
mixtures of pesticides and/or fertilizers.
standard. No other units of measurement are included in this
standard. 4.2 The practice is not designed to determine physical
compatibility of non-aqueous based spray mixtures.
1.7 This standard does not purport to address all of the
4.3 The results or the testing should be used to determine
safety problems, if any, associated with its use. It is the
the compatibility of the mixture ingredients in dynamic appli-
responsibility of the user of this standard to establish appro-
cations. Interpolation of static results to the expectations of the
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. results of this test is not encouraged.
5. Apparatus
5.1 Graduated Cylinder, 100 mL, glass-stoppered.
This practice is under the jurisdiction of ASTM Committee E35 on Pesticides,
Antimicrobials, and Alternative Control Agents and is the direct responsibility of
Subcommittee E35.22 on Pesticide Formulations and Delivery Systems. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2012. Published June 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1993. Last previous edition approved in 2005 as E1508 – 05. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E1518-05R12. the ASTM website.
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E1518 − 05 (2012)
NOTE 5—Various water hardnesses and temperatures may be examined
5.2 Pipets, graduated, wide tip, serological, various delivery
as defined by field-use applications.
volumes.
7.1.2 Addaspecifiedamount,accordingtotheproductlabel
5.3 Balance, accurate to 0.1 g.
directions, of the first pesticide to the jar. Deliver liquid
5.4 Sieve, US Standard, 50 mesh (300 microns), 3-in.
pesticides with a pipet or weigh in solid pesticides.
diameter.
7.1.3 Swirl the jar to ensure that the first pesticide is well
NOTE 1—Other sieve mesh sizes may be used as defined by field-use
dispersed.
applications.
7.1.4 Addaspecifiedamount,accordingtotheproductlabel
5.5 Wide-Mouth Jars, 4 oz with polyethylene seal cups.
directions, of each additional pesticide to the jar used in 7.1.2.
5.6 Shaker, wrist action, Burrell Model 75 or equivalent. Deliver as in Section 7.1.2. After each pesticide addition, cap
the jar and swirl sufficiently to disperse the mixture.
6. Reagents
7.1.5 Place the jar in the shaker. The jar should be perpen-
dicular and at approximately a 45° angle to
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