Research Article
Green Analytical Approach for the Determination of Zinc in Pharmaceutical Product Using Natural Reagent
Table 8
Penalty points for the determination of zinc by proposed spectrophotometric method and the official complexometry method [
32].
| | Reagent/instruments | Penalty points | | Proposed spectrophotometric method | Official complexometry method |
| | HCl | 4 | − | | Sodium EDTA | − | 6 | | Sodium hydroxide | 2 | − | | Acetic acid | − | 8 | | Sodium chloride | 2 | − | | Hexamine | − | 4 | | Ferric chloride | 2 | − | | Sodium carbonate | 0 | 2 | | Water | 0 | 0 | | Ammonia solution | 0 | 6 | | Phosphate buffer | 0 | − | | Occupational hazards | 0 | 0 | | Waste | 6 | 8 | | Instruments energy | 0 | 0 | | Total penalty points | Σ16 | Σ34 | | Analytical ecoscale total score | 84 | 66 |
| | Comment | Excellent green analytical method | Fair green analytical method |
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