ASTM E236-66(2022)

Standard Specification for Apparatus for Microdetermination of Alkoxyl Groups

ABSTRACT
This specification covers the design and dimensional requirements for the apparatus used in the microdetermination of methoxyl and ethoxyl groups in organic compounds. This apparatus is composed of a reaction flask, condenser with scrubber, delivery tube, and two types of receivers—one for volumetric analysis, and the other for gravimetric analysis.
SCOPE
1.1 This specification covers apparatus for the microdetermination of methoxyl and ethoxyl groups in organic compounds.  
Note 1: This specification was originally developed by the Committee on Microchemical Apparatus, Division of Analytical Chemistry, American Chemical Society.2  
1.2 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

• Status: Published
• Publication Date: 31-Aug-2022
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

Overview

ASTM E236-66(2022) - Standard Specification for Apparatus for Microdetermination of Alkoxyl Groups defines the apparatus requirements for precise laboratory analysis of methoxyl and ethoxyl groups in organic compounds. Developed by ASTM International, this standard ensures that all apparatus utilized for microdetermination meet strict design and dimensional specifications, supporting reliable and reproducible analytical results.

The standard addresses the need for consistent laboratory equipment-specifically detailing the structure and materials required for reaction flasks, condensers with scrubbers, delivery tubes, and analytical receivers. This standard specification is vital for laboratories performing chemical and microchemical analysis, especially those involved in organic compound characterization.

Key Topics

• Apparatus Components: Covers the specifications for essential glassware, including:

  • Reaction flask
  • West-type condenser with scrubber
  • Delivery tube
  • Receivers for volumetric and gravimetric analysis

• Material Requirements: All apparatus described must be constructed from borosilicate glass, ensuring chemical resistance and durability under laboratory conditions.

• Design Consistency: Dimensional and design requirements guarantee compatibility and safety, allowing standardized procedures for microdetermination.

• Analysis Methods: Accommodates both volumetric and gravimetric methods for determining methoxyl and ethoxyl groups.

• International Standardization: Developed in accordance with World Trade Organization TBT (Technical Barriers to Trade) guidelines, ensuring global relevance and acceptance.

Applications

ASTM E236-66(2022) is widely used in laboratories and research environments engaged in the analysis of organic compounds with alkoxyl functional groups. Key applications include:

• Quality Control: In chemical, pharmaceutical, and food industries where trace determination of methoxyl and ethoxyl groups is critical for product formulation and compliance.
• Research and Development: Academic and industrial chemical laboratories performing synthetic organic chemistry or studying the composition of complex molecules.
• Reference Method: Serves as the apparatus standard for established microchemical analysis methods, aligning with official AOAC procedures.
• Regulatory Compliance: Supports laboratories in meeting international standardization and testing requirements, facilitating trade and ensuring quality assurance.

Adhering to the guidelines of ASTM E236-66(2022) assures accurate, comparable, and internationally accepted results, crucial for both routine analysis and high-stakes research settings.

Related Standards

For comprehensive laboratory practice, consider these closely related specifications and standards:

• AOAC Official Methods of Analysis: Recognized methods that utilize apparatus meeting ASTM E236 requirements for alkoxyl group determination.
• ASTM E438 - Glass Standards: General specifications for glass laboratory apparatus, including chemical resistance and performance.
• ASTM E287/E288 - Volumetric and Gravimetric Laboratory Procedures: Details practices used in conjunction with the apparatus described in ASTM E236.
• ISO/IEC 17025: General requirements for the competence of testing and calibration laboratories, referencing fit-for-purpose laboratory apparatus.

By implementing ASTM E236-66(2022), laboratories can standardize their equipment for alkoxyl group analysis, ensuring data integrity and compliance with international best practices in chemical analysis.

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:E236 −66 (Reapproved 2022)
Standard Specification for
Apparatus for Microdetermination of Alkoxyl Groups
This standard is issued under the fixed designation E236; 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 3. Condenser with Scrubber
1.1 This specification covers apparatus for the microdeter- 3.1 The West-type condenser with scrubber shall be of
mination of methoxyl and ethoxyl groups in organic com- borosilicate glass and conform to the requirements of Fig. 2.
pounds.
NOTE 2—Spent scrubbing solution may be removed from the scrubber
by inserting through the side arm of the scrubber a drawn-out medicine
NOTE 1—This specification was originally developed by the Committee
dropper or small rubber tube connected to a vacuum source.
on MicrochemicalApparatus, Division ofAnalytical Chemistry,American
NOTE3—Thescrubberisconstrictedtopreventscrubbingsolutionfrom
Chemical Society.
being sucked back into the reaction flask or carried over into the receiver.
1.2 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Delivery Tube
ization established in the Decision on Principles for the
4.1 The delivery tube shall be of borosilicate glass and
Development of International Standards, Guides and Recom-
conform to the requirements of Fig. 3.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5. Receivers
5.1 Two types of receivers are specified, as follows:
2. Reaction Flask
5.1.1 Receiver for Volumetric Analysis shall be of borosili-
2.1 The reaction flask shall be of borosilicate glass and shall
cate glass and conform to the requirements of Fig. 4.
conform to the requirements of Fig. 1.
5.1.2 Receiver for Gravimetric Analysis shall be of borosili-
cate glass and conform to the requirements of Fig. 5.
This specification is under the jurisdiction of ASTM Committee E41 on
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
6. Keywords
Laboratory Ware and Supplies.
6.1 alkoxyl; apparatus; groups; microdetermination
Current edition approved Sept. 1, 2022. Published September 2022. Originally
approvedin1964.Lastpreviousedi
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