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A Continuous Sample Drop Flow-Based Microextraction Method for Spectrophotometric Determination of Cobalt with 1-(2-Pyridylazo)-2-Naphthol in Water Samples

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Abstract

There is always a need to develop new, fast and non-complicated microextraction methods that consume small amounts of organic solvents. In this study, a new mode of liquid phase microextraction method, termed as continuous sample drop flow-based microextraction (CSDF−ME), was developed for the enrichment and determination of cobalt in water samples. To attain the appropriate conditions for the CSDF−ME, experimental parameters such as pH, type and volume of extraction solvent, concentration of chelating agent, salting effect, sample flow rate and sample volume, needle diameter were examined. The enrichment factor was 167 for 20 mL sample solution. The calibration graph was linear in the concentration range of 5–200 μg/L with the correlation coefficient of 0.999. The limit of detection was 1.3 μg/L. The reliability of the recommended procedure was verified by analysis of real water samples (including tap, mineral and river water) and synthetic sample spiked with known amount of cobalt, and the obtained recoveries of spiked samples have demonstrated accuracy and applicability of the proposed method.

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Funding

The authors acknowledge the financial support received from University of Kurdistan, Sanandaj, IRAN, for their support and encouragement in carrying out his college work.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, University of Kurdistan, P.O. Box 416, 66177-15175, Sanandaj, Iran

    Mohanna Ezati, Soleyman Moinfar, Somayeh Mohammadi & Gholamreza Khayatian

  2. Scientific Research Center, University of Zakho, Zakho, Iraq

    Soleyman Moinfar

  3. Research Center for Environmental Determinants of Health (RCEDH), School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran

    Somayeh Mohammadi

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  1. Mohanna Ezati
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  2. Soleyman Moinfar
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  3. Somayeh Mohammadi
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  4. Gholamreza Khayatian
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Correspondence to Gholamreza Khayatian.

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Mohanna Ezati, Moinfar, S., Mohammadi, S. et al. A Continuous Sample Drop Flow-Based Microextraction Method for Spectrophotometric Determination of Cobalt with 1-(2-Pyridylazo)-2-Naphthol in Water Samples. J Anal Chem 76, 172–179 (2021). https://doi.org/10.1134/S1061934821020076

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  • DOI: https://doi.org/10.1134/S1061934821020076

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