ASTM E411 is the standard test method for determining trace quantities of carbonyl compounds with 2,4-Dinitrophenylhydrazine. This test method determines total carbonyl in the range of 0.5 to 50 µg, calculated as CO, in aqueous solutions and a wide range of organic solvents. It also determines acetals that hydrolyze under the test conditions, but carbonyl derivatives that hydrolyze easily, such as acetals and imines, can be determined using a different approach. For detailed information on toxicity, first-aid procedures, and safety measures, refer to the most recent applicable Material Safety Data Sheets (MSDS).
ASTM E411 Standard Test Method for Trace Quantities of Carbonyl Compounds with 2,4-Dinitrophenylhydrazine
What is ASTM E411?
What is the Scope of ASTM E411?
ASTM E411 is a standard test method for determining trace amounts of carbonyl compounds with 2,4-dinitrophenylhydrazine. This test method can determine trace levels of aldehydes and ketones in aqueous solutions and a wide range of organic solvents.
- Purpose: Covers the determination of total carbonyl content (aldehydes and ketones) in aqueous solutions and various organic solvents.
- Range: Measures total carbonyl in the range from 0.5 µg to 50 µg, calculated as CO.
- Principle: Uses 2,4-dinitrophenylhydrazine (DNPH) as a reactive agent to form hydrazones that are measured photometrically.
- Interferences: Acetals that hydrolyze under the test conditions are also determined
ASTM E411 Sample Preparation
For the ASTM E411 test protocol, 2 mL of a sample containing 0.5 to 50 g of carbonyl is utilized as a test specimen.
ASTM E411 Testing Procedure and Requirements
In the ASTM E411 test protocol, a sample containing traces of carbonyl compounds is combined with an acidic solution of 2,4-dinitrophenylhydrazine to generate hydrazone, which, upon reacting with potassium hydroxide, produces a wine-red color, possibly due to a resonant quinoidal ion. The intensity of the red color is determined photometrically as a function of carbonyl concentration, and the amount of carbonyl is read directly from a previously produced calibration curve. This test approach relies on Lappin and Clark’s work.
ASTM E411 Results Analysis and Interpretation
Carbonyl derivatives such as acetals and imines that are easily hydrolyzed may be determined by an alternative procedure.
As per ASTM E411, the carbonyl content of the sample is calculated as follows:
CO, µg/g = A/B
where,
A = weight of carbonyl found, µg
B = sample weight, g
Updated on September 7, 2026
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