Analytical methods for determining Fe(III) and Cu (II) ions

The modified ISEs sensors show high selectivity and sensitivity for determination of copper(II) and iron(III) ions over the other ions. Also they showed stable and reproducible response over a period of five and three months for Copper(II) SPE and CPE sensors respectively and 86 74 66 and 95 days for Fe(III) electrodes (I II III and IV) respectively. This method can be used for potentiometric determination of copper (II) and iron(III) in water soil plant and fish tissue samples and the obtained results agreed with those obtained with atomic absorption spectrometer (AAS). Cu(II)-SPEs CPEs and Fe(III)-CPEs showed advantages over other methods as high performance selectivity sensitivity in a wide range of activities long-term stability wide pH range fast and easy preparation procedures simple instrumentation low cost and higher calibration graph slopes.