Astm D2074 Pdf |top| Site

Prepare separate sample portions. Add acetic anhydride to one to block primary/secondary amines. Add salicylaldehyde to another to mask primary amines.

Uses a simpler indicator titration method (observing a color change) and is specifically not applicable to fatty amidoamines and diamines.

A known amount of the fatty amine sample is weighed and dissolved in a suitable solvent (e.g., isopropyl alcohol).

Many university engineering departments and corporate research libraries maintain active subscriptions to the ASTM Compass platform, offering free access to students and staff. astm d2074 pdf

Salicylaldehyde is added to a second sample aliquot. It reacts exclusively with primary amines, forming a Schiff base that is no longer basic to the indicator. Titrating this mixture yields the sum of secondary and tertiary amines.

When researching fatty amine analysis, researchers frequently encounter both ASTM D2073 and ASTM D2074. ASTM D2073 ASTM D2074 Potentiometric Titration (pH electrode) Visual Indicator Titration (Color change) Equipment Cost Higher (Requires a digital titrator/pH meter) Lower (Requires basic glass burettes) Sample Suitability Excellent for dark, highly coloured samples

The basicity contribution originating strictly from primary amino groups ( −NH2negative cap N cap H sub 2 Prepare separate sample portions

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

The official PDF download or hardcopy version is available directly from the ASTM International website. Purchasing from the source ensures access to the most recent, active revision of the standard. 2. Standard Aggregators

Understanding ASTM D2074: Standard Test Methods for Amine Values of Fatty Amines Uses a simpler indicator titration method (observing a

ASTM D2074 provides a standardized procedure for analyzing the chemical composition of fatty amines. Unlike some other methods that rely on complex instrumentation, D2074 focuses on titration techniques using specific indicators to identify the concentration of different amine types.

ASTM D2074 is an essential, reliable standard for labs involved in the chemical analysis of fatty amines. By utilizing the alternative indicator method, it provides a practical way to determine total and individual amine values. Always refer to the official ASTM D2074 PDF for the precise instructions, as ensuring technical accuracy is vital for quality control in chemical manufacturing.

The milligrams of potassium hydroxide (KOH) equivalent to the basicity of 1 gram of the sample.