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Updated: Jun 28, 2026

Preparation of Functional Silica Using a Bioinspired Method
Published on: August 1, 2018
Indirect spectrophotometric determination of silicate
1Department of Chemistry, California State Polytechnic University, Pomona, California 91768, USA.
A new spectrophotometric method accurately determines trace silicate levels in water. This technique converts silicate into silicomolybdic acid for sensitive detection, enabling precise analysis of silicate concentrations.
Area of Science:
- Analytical Chemistry
- Environmental Science
Background:
- Accurate determination of silicate is crucial for water quality assessment.
- Existing methods for trace silicate analysis can be complex or lack sensitivity.
Purpose of the Study:
- To develop a sensitive and reliable indirect spectrophotometric method for trace silicate determination.
- To establish a robust analytical procedure for silicate analysis in aqueous samples.
Main Methods:
- Silicate is converted to silicomolybdic acid and solvent-extracted.
- Molybdenum(VI) is reduced to molybdenum(III), reoxidized to molybdenum(VI), and complexed with ferrozine.
- Absorbance of the iron(II)-ferrozine complex is measured spectrophotometrically at 562 nm.
Main Results:
- The developed method allows for the determination of submicroamounts of silicate.
- The indirect spectrophotometric approach provides high sensitivity for trace silicate detection.
- The extraction and complexation steps ensure accurate quantification.
Conclusions:
- An effective indirect spectrophotometric method for trace silicate determination in aqueous samples has been established.
- The method offers a sensitive and reliable approach for environmental monitoring and water analysis.
- This technique is suitable for quantifying very low concentrations of silicate.
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