Tertiary amine value is determined directly using a specific titration. Secondary amine value is calculated by subtracting the tertiary value from the combined secondary/tertiary value previously measured.
Used as adjuvants and emulsifiers for pesticides to ensure uniform field application.
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A separate sample portion is treated with salicylaldehyde. This reaction blocks the primary amines, allowing only the secondary and tertiary amines to be titrated. astm d2074 pdf
By selectively reacting with primary or secondary amines, the technician can titrate the remaining active groups to calculate individual values.
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is an international standard that provides a detailed procedure for determining the amine values of fatty amines using an alternative indicator titration method . This standard is widely used in chemical analysis and quality control for products such as surfactants, lubricants, and corrosion inhibitors. Overview of ASTM D2074
When searching for fatty amine testing protocols, researchers frequently encounter both ASTM D2073 and ASTM D2074. Understanding the operational variance is critical: Tertiary amine value is determined directly using a
[ Sample Preparation ] │ ├──> Titration 1: Total Amine Value (Direct titration with Acid) │ ├──> Titration 2: Secondary + Tertiary Amine Value (Salicylaldehyde blocks Primary Amines) │ └──> Titration 3: Tertiary Amine Value Only (Acetic Anhydride blocks Primary & Secondary Amines)
Fatty amines are historically analyzed using various titration techniques. ASTM D2074 specifically outlines a manual colorimetric titration method using alternative indicators (such as bromophenol blue) to identify the endpoint. It serves as a reliable alternative to potentiometric titration methods (like ASTM D2073) when automated titration equipment is unavailable or when rapid manual verification is required on the plant floor. Why Industry Professionals Search for the ASTM D2074 PDF
The standard's primary function is to define the indicator procedure for determining the total, primary, secondary, and tertiary amine values of fatty amines. The results are expressed in the (mg KOH/g).
: A similar blocking reaction is performed, this time using phenyl isothiocyanate (phenyl isocyanate in some revisions) to react with secondary amines. The secondary amine value is found by comparing the titrations of the original sample and the reacted sample. If you are setting up this test method
The ASTM D2074 document outlines several pathways to achieve accurate titration, primarily focusing on alternative indicators and potentiometric setups to handle different sample matrices. 1. Total Amine Value
To perform this test, it is necessary to use the officially published standard. The document can be acquired through official channels:
: The method is applicable to materials containing fatty primary amines, difatty secondary amines, and trifatty tertiary amines.
Hot plate or water bath for samples requiring mild heating to dissolve Limitations and Alternative Standards