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<p>Chromium, mainly Cr (VI), is a chemical contaminant found in water samples, making it an important public health issue. It is also approved for use in cosmetics and personal care products, most commonly in color cosmetics. The present study was conducted to evaluate the trapping of Cr (VI) through a selective adsorbent. In this regard, an ion-imprinted polymer (IIP), modified with Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> nanocomposite, has been synthesized to identify Cr (VI) in drinking water, wastewater, nail polish and lipstick supported by two methods of electro thermal atomic absorption spectroscopy (ETAAS) and ultraviolet–visible spectrophotometry (UV–Vis). In order to screen the relative importance of variables, main factors were performed using Plackett–Burman (PBD) screening design in Minitab 20 software. The optimization process was carried out using the central composite design (CCD). The calibration curves were drawn. The limit of detection (LOD) and limit of quantification (LOQ) for Cr (VI) by ETAAS were 0.001 and 0.004&#xa0;μg L<sup>−1</sup>, respectively. The dynamic linear range (DLR) was 0.007–40.0&#xa0;μg L<sup>−1</sup> with a correlation coefficient of 0.998 (<i>R</i><sup>2</sup>). The relative standard deviation was equal to 4.86% (RSD %), and the relative recoveries were 96.3–103.8% for the determination of Cr (VI) in real samples. The values of LOD and LOQ by UV–Vis method were 0.002 and 0.005&#xa0;µg&#xa0;L<sup>−1</sup>, respectively, and the DLR was 0.007–40.0&#xa0;µg&#xa0;L<sup>−1</sup> with a correlation coefficient (<i>R</i><sup>2</sup>) 0.996. The relative standard deviation (RSD) was 13.26%, and the relative recovery of this method in real samples was attained from 96.51 to 105.47%.</p>

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Development of a selective dual identification strategy for the ETAAS and UV–Vis detection of Cr (VI) ions from aqueous samples and cosmetics using an ion-imprinted polymer magnetic mesoporous silica nanoparticles

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Maryam Omidvar Motlagh,
  • Zarrin Es’haghi,
  • Hasan Ali Hosseini

摘要

Chromium, mainly Cr (VI), is a chemical contaminant found in water samples, making it an important public health issue. It is also approved for use in cosmetics and personal care products, most commonly in color cosmetics. The present study was conducted to evaluate the trapping of Cr (VI) through a selective adsorbent. In this regard, an ion-imprinted polymer (IIP), modified with Fe3O4@SiO2 nanocomposite, has been synthesized to identify Cr (VI) in drinking water, wastewater, nail polish and lipstick supported by two methods of electro thermal atomic absorption spectroscopy (ETAAS) and ultraviolet–visible spectrophotometry (UV–Vis). In order to screen the relative importance of variables, main factors were performed using Plackett–Burman (PBD) screening design in Minitab 20 software. The optimization process was carried out using the central composite design (CCD). The calibration curves were drawn. The limit of detection (LOD) and limit of quantification (LOQ) for Cr (VI) by ETAAS were 0.001 and 0.004 μg L−1, respectively. The dynamic linear range (DLR) was 0.007–40.0 μg L−1 with a correlation coefficient of 0.998 (R2). The relative standard deviation was equal to 4.86% (RSD %), and the relative recoveries were 96.3–103.8% for the determination of Cr (VI) in real samples. The values of LOD and LOQ by UV–Vis method were 0.002 and 0.005 µg L−1, respectively, and the DLR was 0.007–40.0 µg L−1 with a correlation coefficient (R2) 0.996. The relative standard deviation (RSD) was 13.26%, and the relative recovery of this method in real samples was attained from 96.51 to 105.47%.