ASTM E2043-99 (2021) PDF

Full title and description

ASTM E2043-99(2021) — Standard Test Method for Nonvolatile Matter of Agricultural Adjuvant Solutions by Thermogravimetry. This short method describes a thermogravimetric procedure for determining the nonvolatile (residual solids) content of agricultural tank‑mix adjuvant solutions for quality control and formulation assessment.

Abstract

This test method covers the determination of nonvolatile matter in agricultural adjuvant (tank‑mix) solutions by thermogravimetry. It is intended for use in quality control, material screening and related problem solving where a nonvolatile content or a comparison to a known material is required. Typical analysis is empirical and may be adapted with differences noted in reports.

General information

• Status: Published / reapproved in 2021 (catalog records vary; some databases list the 2021 reapproval as withdrawn in certain catalogues — consult ASTM for the definitive status).
• Publication date: 2021 (listed as 30 September 2021 or 01 October 2021 in different sources).
• Publisher: ASTM International (Committee E35; developed by subcommittee E35.22).
• ICS / categories: 65.100.99 (Other pesticides and agrochemicals); 71.040.50 (Physicochemical methods of analysis).
• Edition / version: E2043‑99 (reapproved/affirmed 2021 — sometimes referenced as E2043‑99R21).
• Number of pages: 2 pages (concise test method).

Scope

The standard covers a thermogravimetric test procedure to determine the nonvolatile matter (residual solids) remaining after heating agricultural adjuvant solutions. The method is empirical and intended to produce comparative and QC‑level measurements rather than full compositional analysis; SI units are used and safety/health precautions must be addressed by the user.

Key topics and requirements

• Definition and measurement of nonvolatile matter (residual solids) in adjuvant solutions using thermogravimetry.
• Sample preparation and drying/heating protocol (empirical conditions specified by the method; users may adapt parameters but must report deviations).
• Use of thermogravimetric instrumentation to monitor mass loss and determine remaining nonvolatile fraction.
• Intended applications: quality control, material screening, comparative testing with known reference materials.
• Cross‑references to related thermogravimetric methods (for compositional context).

Typical use and users

Analytical and QC laboratories in agrochemical companies, pesticide/adjuvant manufacturers, formulation scientists, contract test labs and regulatory testing bodies use this test method to verify nonvolatile content of tank‑mix adjuvants, to support batch release and to troubleshoot formulation or stability issues.

Related standards

Related ASTM references include thermogravimetric and compositional analysis standards (for example ASTM E1131 series for compositional analysis by thermogravimetry) and other E35 committee test methods dealing with pesticide formulations and delivery systems. Users should consult committee E35 listings for the latest cross‑references.

Keywords

nonvolatile matter; adjuvant; agricultural adjuvant; tank mix; thermogravimetry; pesticide formulation; residual solids; quality control.

FAQ

Q: What is this standard?

A: ASTM E2043‑99(2021) is a concise ASTM test method that specifies a thermogravimetric procedure to determine the nonvolatile (residual solids) content of agricultural adjuvant (tank‑mix) solutions for QC and comparative purposes.

Q: What does it cover?

A: It covers sample handling, thermogravimetric measurement of mass loss, and the calculation/reporting of nonvolatile matter remaining after heating. The method is empirical and allows parameter adjustments if those changes are documented.

Q: Who typically uses it?

A: Agrochemical formulators, analytical and QC laboratories, contract testing organizations and regulatory laboratories that require a short, reproducible test for residual solids in adjuvant solutions.

Q: Is it current or superseded?

A: The method was reapproved/reaffirmed in 2021 (listed as E2043‑99(2021) in several catalogs). Some catalog listings and aggregated databases note differing statuses (e.g., withdrawn entries in certain commercial catalogues). For legal/contractual use and the definitive status, consult ASTM International directly.

Q: Is it part of a series?

A: It is part of the E2043 designation (originally adopted 1999) and is associated with ASTM E35 committee work on pesticides and formulation testing. It is frequently cross‑referenced with broader thermogravimetric/compositional methods such as ASTM E1131.

Q: What are the key keywords?

A: Nonvolatile matter, adjuvant, thermogravimetry, agricultural adjuvant, pesticide formulation, residual solids, tank‑mix.