Abstract
Based on a novel ionophore, an ion-selective electrode has been developed for the determination of Cu2+ in drinking water. Its selectivity behavior is characterized and its lower detection limit optimized for measurements with different electrolyte backgrounds. The lower detection limit was 2 × 10−9 M Cu2+ for samples with low ionic background and 1 × 10−7 M Cu2+ with ionic background typically found in drinking water.
Keywords: Potentiometric sensor; ICP-MS; Copper determination; Drinking water
Article Outline
1. Introduction
2. Experimental
2.1. Reagents
2.2. Synthesis of N,N,N′N′-tetracyclohexyl-3-thiaglutaric diamide (cf. Fig. 1)
2.3. ISE membranes and electrodes
2.4. EMF measurements
2.5. Selectivity measurements
2.6. ISEs for optimal lower detection limit
2.7. Measurements in drinking water samples
2.8. ICP-MS measurements
3. Results and discussion
3.1. Characterization of the novel Cu2+-ISE
3.2. Optimizing the lower detection limit
3.3. Measurements in drinking water
4. Conclusions
Acknowledgements
References
Based on a novel ionophore, an ion-selective electrode has been developed for the determination of Cu2+ in drinking water. Its selectivity behavior is characterized and its lower detection limit optimized for measurements with different electrolyte backgrounds. The lower detection limit was 2 × 10−9 M Cu2+ for samples with low ionic background and 1 × 10−7 M Cu2+ with ionic background typically found in drinking water.
Keywords: Potentiometric sensor; ICP-MS; Copper determination; Drinking water
Article Outline
1. Introduction
2. Experimental
2.1. Reagents
2.2. Synthesis of N,N,N′N′-tetracyclohexyl-3-thiaglutaric diamide (cf. Fig. 1)
2.3. ISE membranes and electrodes
2.4. EMF measurements
2.5. Selectivity measurements
2.6. ISEs for optimal lower detection limit
2.7. Measurements in drinking water samples
2.8. ICP-MS measurements
3. Results and discussion
3.1. Characterization of the novel Cu2+-ISE
3.2. Optimizing the lower detection limit
3.3. Measurements in drinking water
4. Conclusions
Acknowledgements
References
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