Development of Armillae mellea immobilized nanodiamond for the preconcentrations of Cr(III), Hg(II) and Zn(II)

• Published in: Analytical biochemistry 2021-03, Vol.617, p.114122, Article 114122
• Main Authors: Ozdemir, Sadin, Kılınç, Ersin, Şen, Fatih, Soylak, Mustafa
• Format: Article
• Language: English
• Subjects: Food analysis; Metal ions; Preconcentration; Sensitivity enhancement; Solid-phase extraction
• ISSN: 0003-2697; 1096-0309
• DOI: 10.1016/j.ab.2021.114122

In this study, we present an environmental friend and easy procedure for simultaneous preconcentration of Cr(III), Hg(II) and Zn(II) by solid-phase extraction before their determination by inductively coupled plasma optical emission spectrometry. Armillae mellea immobilized nanodiamond was used as sorbent. During the study, critical parameters influencing the extraction performance were investigated in detail. The best parameters were found as pH 5.0, 2.0 mL min−1 of flow rate, 200 mg of Armillae mellea, 300 mL of sample volume. LOD values were found as 0.025, 0.13 and 0.038 ng mL−1, respectively for Cr(III), Hg(II) and Zn(II). By applying the developed procedure, sensitivities of ICP-OES were improved for 60 fold for Cr(III), Hg(II) and Zn(II). Their concentrations in different food samples were measured after microwave digestion and solid-phase extraction. [Display omitted] •A new biosorbent for solid phase extraction is recommended.•Armillae mellea was immobilized on nanodiamond.•Cr(III), Hg(II) and Zn(II) were simultaneously preconcentrated.•The method was validated and applied to real samples.