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Kinetic-Spectrophotometric Determination of Co (II) in Vegetable Samples by Using Indigo-Caramine
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| Author:
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UPLOADED BY-ADMIN, B.VENKAT KIRAN, SOMSHANKAR DUBEY , BATTULA SREENIVAS RAO
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| Abstract:
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A new kinetic spectrophotometric method has been developed for the determination of trace Co (II) in effluent water. The method is based on the catalytic effect of Co(II) on the oxidation of Indigo-caramine by potassium periodate in basic medium. The concentration of Co(II) can be estimated spectrophotmetrically by measuring the decrease of absorbance of analyte at 412 nm, using fixed time method. The influencing factors are investigated and optimum conditions are established as 0.70 ml of Indigo-caramine, 1.0ml of potassium-periodate, 4.0ml of 1M KOH at controlled -temperature of 25°C ± 5°C . The proposed method allows the determination of Co (II) within the dynamic range of 0.01 ppm to 0.20 ppm. In the interference study few cations and anions are known to interfere with the result. The proposed kinetic-catalytic method can directly applied for the determination of Co (II) at trace levels in vegetable samples.
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| Keyword:
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cobalt, kinetic spectrophotometry, indigo-caramine
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| EOI:
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| DOI:
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