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ASTM D2074 is a standard test method developed by ASTM International (formerly known as the American Society for Testing and Materials). The full title is: "Standard Test Methods for Total, Primary, Secondary, and Tertiary Amine Values of Fatty Amines."
By selectively reacting with primary or secondary amines, the technician can titrate the remaining active groups to calculate individual values.
Hydrochloric Acid (HCl) standardized solution (typically 0.1N or 0.2N) Salicylaldehyde or Butyraldehyde Acetic Anhydride Bromophenol Blue Indicator solution Erlenmeyer flasks (250 mL) Class A Burettes for precise titration delivery astm d2074 pdf
Understanding ASTM D2074: Standard Test Methods for Alternative Molecular Weight Amine Values of Fatty Amines Introduction
When researching this topic, chemists frequently encounter both ASTM D2073 and ASTM D2074. While they achieve similar analytical goals, their methods differ:
To perform this test according to the ASTM guidelines, you generally need: Titration Apparatus : Burettes, Erlenmeyer flasks, and a magnetic stirrer. Standardized Solutions : 0.1 N or 0.5 N Hydrochloric Acid (HCl). Indicators : Bromphenol blue (color change from yellow to blue/green). : Isopropyl alcohol and chloroform. : Salicylaldehyde (for blocking primary amines). How to Access the Full PDF ASTM International standards are copyrighted documents They help bind asphalt to gravel, improving road durability
The ASTM D2074 standard remains a foundational pillar for characterization in oleochemistry. By providing a clear, indicator-based pathway to separate total, primary, secondary, and tertiary amine values, it ensures that industrial formulations perform safely and predictably. For laboratories utilizing manual titration, keeping an official, current copy of the on hand is an indispensable requirement for daily quality control.
Executing this method properly requires precision. Here are a few best practices to keep in mind:
The basicity contribution originating strictly from primary amino groups ( −NH2negative cap N cap H sub 2 Hydrochloric Acid (HCl) standardized solution (typically 0
To perform this test, it is necessary to use the officially published standard. The document can be acquired through official channels:
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