ASTM E2043-99(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: E2043 − 99(Reapproved 2006)
Standard Test Method for
Nonvolatile Matter of Agricultural Adjuvant Solutions by
Thermogravimetry
This standard is issued under the fixed designation E2043; 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 5. Significance and Use
1.1 This test method covers the determination of the non- 5.1 This test method is intended for use in quality control,
volatile matter of agricultural tank mix adjuvant solutions by material screening, and related problem solving where a
thermogravimetry. nonvolatile content is desired or a comparison can be made
with a known material of the same type.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.2 The parameters described may be altered to suit a
responsibility of the user of this standard to establish appro- particular analysis, provided the changes are noted in the
priate safety and health practices and determine the applica-
report.
bility of regulatory limitations prior to use.
6. Apparatus
6.1 Aluminum Weighing Dishes, flat bottom, 70 mL capac-
2. Referenced Documents
ity.
2.1 ASTM Standards:
6.2 Analytical Balance, with a sensitivity of 0.01 g.
E473 Terminology Relating to Thermal Analysis and Rhe-
ology
6.3 Desiccator.
E1131 Test Method for CompositionalAnalysis by Thermo-
6.4 Drying Oven, gravity convection-type, capable of main-
gravimetry
taining a temperature of 50 6 2.5°C. If many determinations of
E1519 Terminology Relating to Agricultural Tank Mix Ad-
solvent-based adjuvants are being made at the same time, an
juvants
explosion-proof oven should be used.
3. Terminology 7. Procedure
3.1 Definitions: 7.1 Bring the material to be tested to equilibrium tempera-
ture at 25 6 5°C.
3.1.1 nonvolatile matter, n—the matter remaining after heat-
ing an agricultural adjuvant solution at 50 6 2.5°C for 16 h.
7.2 Dry two flat-bottomed aluminum weighing dishes in an
oven at 50 6 2.5°C for 1 h. Allow the dishes to return to
4. Summary of Test Method
ambient temperature in a desiccator.
4.1 This test method is an empirical technique using ther-
7.3 Weigh each dish, making the determination in duplicate.
mogravimetry in which the mass of an agricultural adjuvant,
Record the weight of the weighing dish to the nearest 0.01 g.
heated at a controlled rate in an appropriate environment, is
7.4 Add approximately 2.0 6 0.1 g of agricultural adjuvant
recorded as a function of time and temperature. Nonvolatile
solution to the aluminum weighing dish. Record the total
matteristhemassremainingafterheatingataspecifictimeand
weight of the sample and dish to the nearest 0.01 g.
temper
...