The method requires high-purity, reagent-grade chemicals, including: Standardized solution. Isopropyl alcohol. Chloroform. Indicators: Bromphenol blue and Bromcresol green. Phenyl isothiocyanate. Salicylaldehyde. 2. Procedure The procedure generally involves:
: It is generally not applicable to fatty amidoamines or fatty diamines.
The test involves weighing three samples and dissolving them in a solvent (typically a mix of isopropyl alcohol and chloroform).
The most current active version of this standard is . The designation "07(2019)" indicates that the standard was originally issued (or last revised) in 2007 and was reapproved without technical changes in 2019, confirming its continued relevance.
digital file once more. He noticed a small note about temperature compensation for the specific solvent he was using. He realized the lab's AC had kicked over to a "power-save" mode, subtly warming the room and affecting the Bromocresol Green indicator's transition. The Precision of the Standard astm d2074 pdf
All measurements and calculations are reported in SI units. Scope and Significance of the Test Method
Understanding ASTM D2074: Standard Test Methods for Amine Values of Fatty Amines
The amine values are calculated using the titration data. The formula typically follows:
If you are a student, researcher, or employee at a major corporation, your institution's library may already have an active subscription providing free access to the ASTM database. Summary for Lab Technicians Indicators: Bromphenol blue and Bromcresol green
Understanding ASTM D2074: Standard Test Methods for Analysis of Amines
Understanding ASTM D2074: Standard Test Methods for Alternative Molecular Weight Total Amine Value of Fatty Amines Introduction to ASTM D2074
Amines act as hardeners or curing agents for epoxy resins. An incorrect amine value can result in incomplete polymer cross-linking, leading to structural failure or brittle coatings. Summary of the Test Methods
Used as adjuvants and emulsifiers for pesticides to ensure uniform field application. leaving only the tertiary amines basic.
While ASTM D2074 is highly effective, modern laboratories frequently compare it against alternative standards depending on their available technology:
Further isolation involves reacting the sample with acetic anhydride, which acetylates both primary and secondary amines, leaving only the tertiary amines basic. Titration then reveals the tertiary amine value. Through a process of elimination and mathematical subtraction, lab technicians can precisely calculate the distinct values for all three amine types. Key Reagents and Apparatus Required
Fatty amines are nitrogen derivatives of fatty acids. They are widely used as chemical intermediates across various industries. This specific standard provides a reliable chemical pathway to measure the concentration of different amine types within a sample. The Significance of Amine Values