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The Effect of Ultraviolet Radiation on the Chemical Bath Deposition of Bisthiourea Cadmium Chloride Crystals and the Subsequent CdS Obtention
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Direct Spectrophotometric Method for Determination of Cadmium (II) Ions Using Bis-Thiosemicarbazone
Sulafa Nassar1, Gharam I Mohammed1, Thoraya A Farghaly2
1Chemistry Department, Faculty of Science, Umm Al-Qura University, Makkah, Saudi Arabia.
International Journal of Analytical Chemistry
|May 14, 2025
Summary
A new spectrophotometric method accurately determines Cadmium (II) ions using a simple, sensitive technique. This advancement simplifies metal ion analysis without solvent purification, offering a cost-effective solution.
Area of Science:
- Analytical Chemistry
- Environmental Chemistry
Background:
- Accurate determination of Cadmium (II) ions is crucial for environmental monitoring and human health.
- Existing spectrophotometric methods for Cadmium (II) often require complex sample preparation, limiting their practical application.
Purpose of the Study:
- To develop a simple, precise, and sensitive spectrophotometric method for Cadmium (II) ion determination.
- To investigate the complexation of Cadmium (II) with bis(indoline-2, 3-dione) thiosemicarbazone (L) for analytical purposes.
Main Methods:
- Spectrophotometric analysis of Cadmium (II) ions in the presence of bis(indoline-2, 3-dione) thiosemicarbazone (L) at pH 12.
- Utilizing Briton-Robinson Buffer for pH control.
- Characterization of the isolated L-Cd complex using elemental analysis, UV-Vis, mass spectrometry, and thermal analysis.
Main Results:
- The method accurately quantifies Cadmium (II) ions within a concentration range of (1.8-17.8)×10⁻⁵ mol L⁻¹ following Beer's law.
- Achieved a low limit of detection (0.245 μg mL⁻¹) and limit of quantification (0.817 μg mL⁻¹).
- Established a 1:2 molar ratio between the ligand (L) and Cadmium (II) ions, forming a stable metal complex.
Conclusions:
- The developed spectrophotometric method is simple, rapid, cost-effective, and highly sensitive for Cadmium (II) determination.
- The method eliminates the need for solvent purification or concentration steps.
- The characterization of the isolated L-Cd complex provides further validation of the analytical approach.
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