ASTM E1910/E1910M-21
(Test Method)Standard Test Method for Agricultural pH Control Agents, Measurement of pH Change and Buffering Capacity
Standard Test Method for Agricultural pH Control Agents, Measurement of pH Change and Buffering Capacity
SIGNIFICANCE AND USE
4.1 This test method is intended for products sold as tank mix adjuvants for use with agricultural products.
4.2 Part A provides a determination of whether the pH modification characteristics of the adjuvant tested meet the definition of an acidifier, alkalinity agent, or a basic blend in Terminology E1519. Part B provides a measure of the buffer capacity of the adjuvant. This can be used to estimate the amount of a buffer that will be required to keep a spray solution at the desired pH.
4.3 Other pH standards can be used (see Test Method E70) as long as the pHs measured are not outside the range of the standards used.
4.4 If samples of the material to be used in a particular application are available, the first method can be used to determine what adjuvant rate is required to obtain the desired pH. The ability of an adjuvant to adjust the pH of a particular system will depend on the initial pH before addition.
4.5 The second method can be used to determine the amount of an adjuvant required to change the pH of a quantity of spray solution to the required value (see Note 1).
Note 1: Many acidifiers and basic blends also are buffers, so the pH change does not provide a useful measure of buffer capacity.
SCOPE
1.1 These test methods cover determining if an adjuvant meets the definitions of an acidifier, a basic blend, alkalinity agent, or buffer in Terminology E1519.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E1910/E1910M − 21
Standard Test Method for
Agricultural pH Control Agents, Measurement of pH Change
1
and Buffering Capacity
ThisstandardisissuedunderthefixeddesignationE1910/E1910M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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 3. Summary of Test Method
1.1 These test methods cover determining if an adjuvant
3.1 Test Method A measures the change in pH of a sample
meets the definitions of an acidifier, a basic blend, alkalinity on the addition of an acidifier or alkalinity agent. Test Method
agent, or buffer in Terminology E1519.
B measures the buffer capacity of the adjuvant by titration.
1.2 The values stated in either SI units or inch-pound units
4. Significance and Use
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
4.1 This test method is intended for products sold as tank
system shall be used independently of the other. Combining
mix adjuvants for use with agricultural products.
values from the two systems may result in non-conformance
4.2 Part A provides a determination of whether the pH
with the standard.
modification characteristics of the adjuvant tested meet the
1.3 This standard does not purport to address all of the
definition of an acidifier, alkalinity agent, or a basic blend in
safety concerns, if any, associated with its use. It is the
Terminology E1519. Part B provides a measure of the buffer
responsibility of the user of this standard to establish appro-
capacity of the adjuvant. This can be used to estimate the
priate safety, health, and environmental practices and deter-
amountofabufferthatwillberequiredtokeepaspraysolution
mine the applicability of regulatory limitations prior to use.
at the desired pH.
1.4 This international standard was developed in accor-
4.3 Other pH standards can be used (see Test Method E70)
dance with internationally recognized principles on standard-
as long as the pHs measured are not outside the range of the
ization established in the Decision on Principles for the
standards used.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 4.4 If samples of the material to be used in a particular
Barriers to Trade (TBT) Committee. application are available, the first method can be used to
determine what adjuvant rate is required to obtain the desired
2. Referenced Documents
pH. The ability of an adjuvant to adjust the pH of a particular
2
2.1 ASTM Standards: system will depend on the initial pH before addition.
D1126 Test Method for Hardness in Water
4.5 Thesecondmethodcanbeusedtodeterminetheamount
D1193 Specification for Reagent Water
of an adjuvant required to change the pH of a quantity of spray
E70 Test Method for pH of Aqueous Solutions With the
solution to the required value (see Note 1).
Glass Electrode
NOTE 1—Many acidifiers and basic blends also are buffers, so the pH
E200 Practice for Preparation, Standardization, and Storage
change does not provide a useful measure of buffer capacity.
of Standard and Reagent Solutions for ChemicalAnalysis
E1519 Terminology Relating to Agricultural Tank Mix Ad-
5. Apparatus
juvants
5.1 pH Meter, accurate to 0.01 unit.
1
These test methods are under the jurisdiction of ASTM Committee E35 on
5.2 CombinationGlass/CalomelElectrode,orseparateglass
Pesticides, Antimicrobials, and Alternative Control Agentsand are the direct
and calomel electrodes or other suitable pH electrode system.
responsibility of Subcommittee E35.22 on Pesticide Formulations and Delivery
Systems.
5.3 Beakers, 250 mL.
Current edition approved April 1, 2021. Published May 2021. Originally
approved in 1997. Last previous edition approved in 2015 as E1910/E1910M – 15.
5.4 Magnetic Stirrer, 120 to 1200 rpm, or equivalent.
DOI: 10.1520/E1910_E191M-21.
3
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5.5 Magnetic Stir Bar, 1 in. (2.5 cm) in length and ⁄8 in.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
(0.95 cm) in diameter.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 5.6 Burette, 50 mL, Class A.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E1910/E1910M − 21
6. Reagents magnetic stirrer and stir bar, while the measurements
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E1910/E1910M − 15 E1910/E1910M − 21
Standard Test Method for
Agricultural pH Control Agents, Measurement of pH Change
1
and Buffering Capacity
This standard is issued under the fixed designation E1910/E1910M; 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
1.1 These test methods cover determining if an adjuvant meets the definitions of an acidifier, a basic blend, alkalinity agent, or
buffer in Terminology E1519.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D1126 Test Method for Hardness in Water
D1193 Specification for Reagent Water
E70 Test Method for pH of Aqueous Solutions With the Glass Electrode
E200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
E1519 Terminology Relating to Agricultural Tank Mix Adjuvants
3. Summary of Test Method
3.1 Test Method A measures the change in pH of a sample on the addition of an acidifier or a basic blend. alkalinity agent. Test
Method B measures the buffer capacity of the adjuvant by titration.
4. Significance and Use
4.1 This test method is intended for products sold as tank mix adjuvants for use with agricultural products.
1
These test methods are under the jurisdiction of ASTM Committee E35 on Pesticides, Antimicrobials, and Alternative Control Agentsand are the direct responsibility
of Subcommittee E35.22 on Pesticide Formulations and Delivery Systems.
Current edition approved Oct. 1, 2015April 1, 2021. Published November 2015May 2021. Originally approved in 1997. Last previous edition approved in 20092015 as
E1910/E1910M – 04E1910/E1910M – 15.(2009). DOI: 10.1520/E1910_E191M-15.10.1520/E1910_E191M-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E1910/E1910M − 21
4.2 Part A provides a determination of whether the pH modification characteristics of the adjuvant tested meet the definition of
an acidifier, alkalinity agent, or a basic blend in Terminology E1519. Part B provides a measure of the buffer capacity of the
adjuvant. This can be used to estimate the amount of a buffer that will be required to keep a spray solution at the desired pH.
4.3 Other pH standards can be used (see Test Method E70) as long as the pHs measured are not outside the range of the standards
used.
4.4 If samples of the material to be used in a particular application are available, the first method can be used to determine what
adjuvant rate is required to obtain the desired pH. The ability of an adjuvant to adjust the pH of a particular system will depend
on the initial pH before addition.
4.5 The second method can be used to determine the amount of an adjuvant required to change the pH of a quantity of spray
solution to the required value (see Note 1).
NOTE 1—Many acidifiers and basic blends also are buffers, so the pH change does not provide a useful measure of buffer capacity.
5. Apparatus
5.1 pH Meter, accurate to 0.01 unit.
5.2 Combination Glass/Calomel Electrode, or separate glass and calomel electrodes or other suitabl
...
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