ASTM D2074 is a standard test method developed by ASTM International. Its official title is
Yes. The standard allows for bromophenol blue indicator, but this is less accurate for colored or dark samples. The potentiometric (pH meter) method is preferred.
Fatty amines often exist as complex mixtures of different amine types.ASTM D2074 uses selective blanking reagents like salicylaldehyde or acetic anhydride.These reagents react with specific amine groups to isolate others.This allows independent calculation of each distinct amine value type. Reagents and Equipment
ASTM D2074 — Comprehensive Review, Applications, and Technical Analysis astm d2074 pdf
: After blocking primary amines, a second derivatization is performed to block secondary amines, leaving only tertiary amines to be titrated. Subtraction steps yield the secondary and tertiary amine values individually.
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While ASTM D2074 uses indicator titration, it is often compared to ASTM D2073 , which covers the same measurements but employs potentiometric titration
Nitrogen atoms bonded to three carbon chains ( Why is the Amine Value Critical?
The standard provides specific formulas for calculating the Total, Primary, Secondary, and Tertiary Amine Values in mg KOH/g. The result is not simply the sum of individual values, as primary and secondary determinations are used to derive the final results. The potentiometric (pH meter) method is preferred
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Both methods are specified for quality control in technical data sheets across industries.
The team reviewed the data, which showed that the new formulation had an OIT of 30 minutes, indicating a relatively high resistance to oxidation. However, one team member, Alex, raised a concern, "Isn't the ASTM D2074 test just a rough estimate? What about real-world conditions?"
During the amination of fatty acids or alcohols, real-time testing helps engineers determine if the chemical reaction has reached completion.
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