1、Designation: E2043 99 (Reapproved 2017)Standard Test Method forNonvolatile Matter of Agricultural Adjuvant Solutions byThermogravimetry1This standard is issued under the fixed designation E2043; the number immediately following the designation indicates the year oforiginal adoption or, in the case o
2、f revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the non-volatile matter of agricultural tank mix
3、adjuvant solutions bythermogravimetry.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the u
4、ser of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established i
5、n the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2E473 Terminology Relating to Thermal Analysis and Rhe-ologyE1131 Test M
6、ethod for Compositional Analysis by Thermo-gravimetryE1519 Terminology Relating to Agricultural Tank Mix Ad-juvants3. Terminology3.1 Definitions:3.1.1 nonvolatile matter, nthe matter remaining after heat-ing an agricultural adjuvant solution at 50 6 2.5C for 16 h.4. Summary of Test Method4.1 This te
7、st method is an empirical technique using ther-mogravimetry in which the mass of an agricultural adjuvant,heated at a controlled rate in an appropriate environment, isrecorded as a function of time and temperature. Nonvolatilematter is the mass remaining after heating at a specific time andtemperatu
8、re.5. Significance and Use5.1 This test method is intended for use in quality control,material screening, and related problem solving where anonvolatile content is desired or a comparison can be madewith a known material of the same type.5.2 The parameters described may be altered to suit aparticula
9、r analysis, provided the changes are noted in thereport.6. Apparatus6.1 Aluminum Weighing Dishes, flat bottom, 70 mL capac-ity.6.2 Analytical Balance, with a sensitivity of 0.01 g.6.3 Desiccator.6.4 Drying Oven, gravity convection-type, capable of main-taining a temperature of 50 6 2.5C. If many det
10、erminations ofsolvent-based adjuvants are being made at the same time, anexplosion-proof oven should be used.7. Procedure7.1 Bring the material to be tested to equilibrium tempera-ture at 25 6 5C.7.2 Dry two flat-bottomed aluminum weighing dishes in anoven at 50 6 2.5C for 1 h. Allow the dishes to r
11、eturn toambient temperature in a desiccator.7.3 Weigh each dish, making the determination in duplicate.Record the weight of the weighing dish to the nearest 0.01 g.7.4 Add approximately 2.0 6 0.1 g of agricultural adjuvantsolution to the aluminum weighing dish. Record the totalweight of the sample a
12、nd dish to the nearest 0.01 g.1This test method is under the jurisdiction of ASTM Committee E35 onPesticides, Antimicrobials, and Alternative Control Agents and is the directresponsibility of Subcommittee E35.22 on Pesticide Formulations and DeliverySystems.Current edition approved Nov. 1, 2017. Pub
13、lished December 2017. Originallyapproved in 1999. Last previous edition approved in 2012 as E2043 99 (2012).DOI: 10.1520/E2043-99R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume infor
14、mation, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardizati
15、on established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.17.5 Place the dish in an oven at 50 6 2.5C. Maintain thistemperature for 16 h 6 5 min. Begin timi
16、ng when the oven hasreturned to temperature after loading.7.6 After heating is complete, place the dish in a desiccatorand allow it to return to ambient temperature.7.7 Weigh the dish and sample to the nearest 0.01 g.8. Calculation8.1 Calculate the percent nonvolatile matters, using thefollowing equ
17、ation:S 5R 2 TW 2 T3100 (1)where:R = final weight of residue and pan, g,T = tare weight of pan, g, andW = initial weight of sample and pan, g.9. Precision and Bias9.1 Duplicate determination should not differ by more than0.5 % of the mean value.10. Keywords10.1 adjuvant; agriculture; nonvolatile mat
18、ter; pesticide;solids; thermogravimetryASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the
19、riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of
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21、ke your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained
22、by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 99 (2017)2
