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Benzyloxybenzaldehydethiosemicarbazone: Extractive Spectrophotometric Reagent for the Determination of Cu(II) in Food and Water Samples

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Abstract

Benzyloxybenzaldehydethiosemicarbazone (BBTSC) was prepared and developed a new method for the simple, highly selective, and extractive spectrophotometric determination of copper(II) with BBTSC at wavelength 370 nm. The metal ion formed a bluish green colored complex with BBTSC in acetate buffer of pH 5.0, which was easily extractable into n-butanol with 1:1(metal/ligand) composition. The method obeys Beer’s law in the range of 0.5–5.2 ppm. The molar absorptivity and Sandell’s sensitivity were found to be 1.5 × 104 l mol−1 cm−1 and 0.00412 g cm−2, respectively. The correlation coefficient of the Cu(II)–BBTSC complex was 0.998, which indicated an excellent linearity between the two variables. The repeatability of the method was checked by finding the relative standard deviation (RSD; n = 10), which was 0.377% and its detection limit 0.0204 μg ml−1. The interfering effect of various cations and anions were also studied. The proposed method was successfully applied to the determination of copper(II) in food and water samples. Comparing the results with those obtained using an atomic absorption spectrophotometer tested the validity of the method.

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Acknowledgments

One of the authors, K. Janardhan Reddy, is highly grateful to the Council of Scientific & Industrial Research (CSIR), Government of India, New Delhi for financial assistance in the form of Senior Research Fellowship.

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Authors and Affiliations

  1. Analytical Division, Department of Chemistry, Sri Venkateswara University, Tirupati, 517-502, India

    S. Lakshmi Narayana, K. Janardhan Reddy, S. Adinarayana Reddy & A. Varada Reddy

  2. Department of Chemistry, Chaitanya Bharathi Institute of Technology, Hyderabad, India

    Y. Sarala

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  1. S. Lakshmi Narayana
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  2. K. Janardhan Reddy
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  3. S. Adinarayana Reddy
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  4. Y. Sarala
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  5. A. Varada Reddy
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Correspondence to A. Varada Reddy.

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Narayana, S.L., Reddy, K.J., Reddy, S.A. et al. Benzyloxybenzaldehydethiosemicarbazone: Extractive Spectrophotometric Reagent for the Determination of Cu(II) in Food and Water Samples. Food Anal. Methods 1, 293–299 (2008). https://doi.org/10.1007/s12161-008-9028-1

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