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ASTM D2023-89(2016)

(Test Method)

Standard Test Method of Analysis for Sodium Toluene Sulfonate in Detergents

Standard Test Method of Analysis for Sodium Toluene Sulfonate in Detergents

SIGNIFICANCE AND USE
4.1 This test method is of use to anyone engaged in compositional analysis of detergent formulations. This would include formulators, and analysts employed by companies that manufacture the components usually included in such formulations.
SCOPE
1.1 This test method covers the analysis for the apparent sodium toluene sulfonate (NaTS) content of detergents.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 and health practices and determine the applicability of regulatory limitations prior to use. Material Safety Data sheets are available for reagents and materials. Review them for hazards prior to usage.

General Information

Status
Published
Publication Date
30-Jun-2016
ICS
71.100.40 - Surface active agents
Technical Committee
D12 - Soaps and Other Detergents
Drafting Committee
D12.12 - Analysis and Specifications of Soaps, Synthetics, Detergents and their Components
Current Stage
Ref Project

Relations

Replaces
ASTM D2023-89(2009) - Standard Test Method of Analysis for Sodium Toluene Sulfonate in Detergents
Effective Date
01-Jul-2016
Refers
ASTM D1193-06 - Standard Specification for Reagent Water
Effective Date
01-Mar-2006
Refers
ASTM D1193-99e1 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999
Refers
ASTM D1193-99 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999

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ASTM D2023-89(2016) - Standard Test Method of Analysis for Sodium Toluene Sulfonate in DetergentsASTM D2023-89(2016) - Standard Test Method of Analysis for Sodium Toluene Sulfonate in Detergents
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ASTM D2023-89(2016) - Standard Test Method of Analysis for Sodium Toluene Sulfonate in Detergents
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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: D2023 − 89 (Reapproved 2016)
Standard Test Method of
Analysis for Sodium Toluene Sulfonate in Detergents
This standard is issued under the fixed designation D2023; 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. Interferences
1.1 This test method covers the analysis for the apparent 5.1 Any low molecular weight substituted benzene sul-
sodium toluene sulfonate (NaTS) content of detergents. fonate or benzene sulfonate (NaBS) itself will interfere and
give an apparent toluene sulfonate figure. Since the method is
1.2 The values stated in SI units are to be regarded as
standardized using p-toluene sulfonate, o-sulfonate will not be
standard. No other units of measurement are included in this
assayed correctly. When contamination is suspected, it should
standard.
be checked by running a complete absorption curve and
1.3 This standard does not purport to address all of the
comparing with known samples.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Apparatus
priate safety and health practices and determine the applica-
NOTE 1—Absolute cleanliness of apparatus is essential. Use glass
apparatus only. Contact with rubber, cork, or hands will introduce
bility of regulatory limitations prior to use. Material Safety
absorbance errors.
Data sheets are available for reagents and materials. Review
6.1 Separatory Funnels, 500-mL capacity, glass-stoppered,
them for hazards prior to usage.
pear-shaped.
2. Referenced Documents
6.2 Balance, analytical.
2.1 ASTM Standards:
6.3 Spectrophotometer (Note 2), with necessary ultraviolet
D1193 Specification for Reagent Water
accessories for working in the range from 230 to 300 nm.
These include 1.00 and 5.00-cm absorption cells with quartz
3. Summary of Test Method
windows.
3.1 This test method is based on the separation of the low
NOTE 2—Details of the test method as written are based on the use of
molecular weight sulfonate from interfering higher molecular
the Beckman DU or Cary recording spectrophotometers. Equivalent
weight sulfonates and determination by ultraviolet absorption.
spectrophotometers also may be used, provided suitable modifications can
be made in the details of the method.
The higher molecular weight sulfonates are extracted as
sulfonic acids in a hydrochloric acid solution using ethyl ether
7. Reagents
as the solvent.
7.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
4. Significance and Use
all reagents shall conform to the specifications of the Commit-
4.1 This test method is of use to anyone engaged in
tee onAnalytical Reagents of theAmerican Chemical Society,
compositional analysis of detergent formulations. This would
where such specifications are available. Other grades may be
include formulators, and analysts employed by companies that
used, provided it is first ascertained that the reagent is of
manufacture the components usually included in such formu-
sufficiently high purity to permit its use without lessening the
lations.
accuracy of the determination.
7.2 Purity of Water—Unless otherwise indicated, references
to water shall be understood to mean reagent water conforming
This test method is under the jurisdiction of ASTM Committee D12 on Soaps
to Specification D1193.
and Other Detergents and is the direct responsibility of Subcommittee D12.12 on
Analysis and Specifications of Soaps, Synthetics, Detergents and their Components.
Current edition approved July 1, 2016. Published August 2016. Originally
approved in 1962 as D2023 – 62 T. Last previous edition approved in 2009 as Reagent Chemicals, American Chemical Society Specifications, American
D2023 – 89(2009). DOI: 10.1520/D2023-89R16. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
the ASTM website. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2023 − 89 (2016)
7.3 Ethyl Ether. 10. Procedure
7.4 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro- 10.1 Weigh 10.00 6 0.01 g of the sample of synthetic
chloric acid (HCl). detergent to be analyzed and dissolve in about 75 mL of hot
water. Transfer to a 500-mL glass-stoppered, pear-shaped,
7.5 Hydrochloric Acid (1+3)—Mix 1 volume of concen-
separatory funnel; add 10.0 g of Na SO and 40 mL of HCl.
2 4
trated HCl with 3 volumes of water.
Swirl to dissolve and cool to room temperature.
7.6 p-Toluenesulfonic Acid Sodium Salt (NaTS) —Dry for
10.2 Extract twice with 100-mL portions of ethyl ether,
24 h at 105°C and store in a desiccator. Use for preparat
...

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1.2 The analytical procedures appear in the following order:    
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Moisture and Other Matter Volatile at 105°C (Oven Method)  
5 and 6  
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7 and 8  
Anhydrous, Salt-Free, Soda Soap  
9 – 12  
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13 and 14  
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29 – 34  
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35 – 39  
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40  
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41 – 43  
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