Astm D2074 Pdf Link
Acetic anhydride is added to a third sample aliquot. It acetylates both primary and secondary amines, rendering them non-basic. The remaining tertiary amines are titrated.
However, standard TBN tests (like color-indicator titration) fail with dark oils because you cannot see the color change of the indicator. This is where becomes essential. It uses a potentiometric method (measuring voltage changes) rather than a visual color change, making it immune to the oil's opacity.
Sellers and buyers use the amine value as a core certificate of analysis (CoA) parameter to establish market pricing and verify purity. Summary of the Test Method Procedure
ASTM does not always publicly state the reason for withdrawal, but typically it occurs because the test method has been superseded by a better alternative (e.g., ASTM D2073) or because the technology or industry usage has declined to the point that maintenance of the standard is no longer justified.
The ASTM D2074 PDF provides a detailed and technically sound method for evaluating the saponification value of fats and oils. The test method involves reacting a sample of the fat or oil with a known amount of alkali (typically potassium hydroxide) and then determining the amount of excess alkali remaining after the reaction. The saponification value is calculated based on the amount of alkali consumed during the reaction. astm d2074 pdf
Verified and indexed versions of the document are hosted by industrial research databases, such as NBS Source . Optimizing Your Lab for ASTM D2074 Testing
Because ASTM standards are protected by copyright laws, the complete, official is not available legally for free on public websites. Users seeking the full document with detailed step-by-step instructions, calculation formulas, and precision data must acquire it through legal channels. 1. Direct Purchase from ASTM International
ASTM D2074 outlines two distinct wet-chemistry procedures for quantifying nitrogen:
Key milestones in this timeline include: Acetic anhydride is added to a third sample aliquot
Isolated directly via the blocking steps or measured independently using acetic anhydride. Acetic anhydride acetylates primary and secondary amines, leaving only the tertiary amines available for titration with perchloric acid in acetic acid. Equipment and Reagents Required
Fatty amines are nitrogen-containing derivatives of fatty acids. They serve as critical intermediates in manufacturing surfactants, corrosion inhibitors, asphalt emulsifiers, and fabric softeners.
The method utilizes indicator-based titration rather than potentiometric titration, making it a straightforward approach for many laboratory settings.
provides a standardized, analytical pathway to determine the amine values within these chemical compounds. Specifically, it outlines alternative indicator methods to accurately measure four distinct metrics: Total Amine Value Primary Amine Value Secondary Amine Value Tertiary Amine Value Sellers and buyers use the amine value as
Ask for the for primary or secondary amines.
What specific (e.g., surfactants, corrosion inhibitors) are you testing for?
: The primary source for the official ASTM D2074 standard.