Astm D2074 Pdf |best| Jun 2026

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The ASTM D2074 standard, titled "Standard Test Methods for Fatty Acid Composition of Vegetable Oils and Greases," provides a set of methods for determining the fatty acid composition of vegetable oils and greases.

: Common chemicals used include Isopropyl alcohol , Chloroform , and standard hydrochloric acid (0.1 N).

To determine the primary amine content, salicylaldehyde is added to a separate sample aliquot. Salicylaldehyde selectively reacts with primary amines to form an unreactive Schiff base. The remaining unreacted secondary and tertiary amines are titrated. Subtracting this result from the total amine value yields the primary amine value. 3. Secondary Amine Value astm d2074 pdf

Ensure that your titrants (like HClO₄) are freshly standardized against a primary standard (such as potassium hydrogen phthalate) to prevent systemic calculation errors.

The standard is primarily used for fatty amines which are derived from natural fats and oils. These chemicals are widely used as: in oil and gas pipelines. Emulsifiers for asphalt and road surfacing. Fabric softeners and surfactants in detergent formulations. Chemical intermediates in the production of biocides.

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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."

The procedure uses standard equipment like alkali-resistant Erlenmeyer flasks and a magnetic stirrer to ensure consistency. All measurements are expressed in SI units.

Yes. While D2896 is more common for new oils, it uses perchloric acid in glacial acetic acid—a hazardous combination. ASTM D2074 uses safer alcoholic HCl. Furthermore, for extremely dark, soot-laden used oils, D2074 often provides more repeatable results due to its specific solvent system and weaker acid strength, which better mimics real-world acid neutralization. To determine the primary amine content, salicylaldehyde is

Verified and indexed versions of the document are hosted by industrial research databases, such as NBS Source . Optimizing Your Lab for ASTM D2074 Testing

The "amine value" refers to the number of milligrams of potassium hydroxide (KOH) equivalent to the basicity of one gram of the sample. This metric is a vital indicator of the purity and reactivity of the chemical. Scope and Application

The standard explicitly stated that these test methods were and fatty diamines . These related compound classes require different analytical approaches due to their differing chemical reactivity .

: This is determined by reacting the primary amines in the sample with salicylaldehyde. This reaction blocks the primary amine groups, allowing any remaining secondary or tertiary amines to be titrated. The primary amine value is then calculated by the difference between the total amine value and the remaining amine value.

By subtracting these values from one another, the chemist isolates the exact milligrams of KOH equivalent for primary, secondary, and tertiary amines. ASTM D2074 vs. ASTM D2073