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Reverse micelle-based chemiluminescence system for quinine sulphate
Guofeng Tang1, Yuming Huang, Wenbing Shi
1Department of Chemistry, Institute of Analytical Sciences, Southwest Normal University, Beibei, Chongqing 400715, People's Republic of China.
Summary
A novel chemiluminescence method enables sensitive quinine sulfate detection. This technique utilizes solvent extraction and a reversed micellar medium for accurate quantification in biological samples.
Area of Science:
- Analytical Chemistry
- Biochemistry
Background:
- Quinine sulfate is a key pharmaceutical compound requiring precise analytical methods for quality control and pharmacokinetic studies.
- Existing methods for quinine sulfate determination may lack sensitivity or require complex sample preparation.
Purpose of the Study:
- To develop and validate a sensitive chemiluminescence (CL) method for quinine sulfate determination.
- To investigate the application of a reversed micellar system for enhancing CL detection of quinine sulfate.
Main Methods:
- Solvent extraction of quinine sulfate as a tetrachloroaurate (III) ion-pair complex.
- Chemiluminescence detection using luminol in a reversed micellar medium (cetyltrimethylammonium bromide in dichloromethane-cyclohexane-water).
- Optimization of buffer composition, pH, and solvent ratios for maximum CL signal.
Main Results:
- The method demonstrated a linear relationship between CL intensity and quinine sulfate concentration from 0.015 to 10 microg/mL.
- A low detection limit of 1.5 ng/mL was achieved.
- High precision was observed with a relative standard deviation of 1.38% for 2.5 microg/mL quinine sulfate.
Conclusions:
- The proposed chemiluminescence method offers a sensitive and reliable approach for quinine sulfate determination.
- The method's applicability to biological fluid analysis was successfully demonstrated, indicating its practical utility.