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Sulpholane as colour-enhancing and stabilizing agent for silicomolybdic acid
1School of Chemistry Georgia Institute of Technology Atlanta, Aa, 30332, U.S.A.
Talanta
|April 1, 1973
Summary
Adding sulpholane enhances silicomolybdic acid colorimetry, outperforming acetone. This method stabilizes beta-silicomolybdic acid for improved photometric measurements around 400 nm, with sulpholane
Area of Science:
- Analytical Chemistry
- Spectrophotometry
Background:
- Silicomolybdic acid is used for colorimetric analysis.
- Acetone is a common solvent but has limitations.
Purpose of the Study:
- To investigate sulpholane as an alternative solvent for silicomolybdic acid colorimetry.
- To optimize conditions for enhanced color development and stability.
Main Methods:
- Addition of 20-40% v/v sulpholane to silicomolybdic acid solutions.
- pH adjustment to a specific range (0>d1-1>d8).
- Photometric measurement at approximately 400 nm.
Main Results:
- Sulpholane provides superior color enhancement compared to acetone.
- Beta-silicomolybdic acid is stabilized in sulpholane solutions.
- Optimal results achieved within a specific pH range.
Conclusions:
- Sulpholane is a more effective solvent for silicomolybdic acid colorimetry.
- The use of sulpholane offers improved color stability and lower volatility.
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