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Spectrophotometric determination of acetone using vanillin.
The Analyst
|October 1, 1990
Summary
This study presents a sensitive spectrophotometric method for determining acetone in water using vanillin. The optimized method accurately quantifies acetone in biological samples and air.
Area of Science:
- Analytical Chemistry
- Spectrophotometry
Background:
- Accurate determination of acetone is crucial in various fields, including environmental monitoring and biological analysis.
- Existing methods may lack sensitivity or require complex procedures.
Purpose of the Study:
- To develop a sensitive and reliable spectrophotometric method for acetone determination.
- To optimize reaction conditions for enhanced sensitivity and accuracy.
Main Methods:
- Acetone reacts with vanillin in an alkaline medium to form a colored dye.
- Spectrophotometric analysis was performed at an absorption maximum of 430 nm.
- Key parameters influencing color development were optimized.
Main Results:
- The method demonstrated adherence to Beer's law within the 0.5 to 5 p.p.m. range.
- High molar absorptivity (11.0 x 10^3 L mol^-1 cm^-1) and Sandell's sensitivity (0.005 µg cm^-2) were achieved.
- The method was successfully applied to biological samples and air analysis.
Conclusions:
- The developed vanillin-based spectrophotometric method offers high sensitivity and accuracy for acetone quantification.
- This method provides a viable option for determining acetone in diverse matrices, including biological samples and air.