Chemically functionalized silica nanoparticles‐based solid‐phase extraction for effective pre‐concentration of highly toxic metal ions from food and water samples |
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| Authors: | Maryam Rajabi Mohtarameh Rahimi Maryam Hemmati Farhood Najafi |
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| Affiliation: | 1. Department of Chemistry, Semnan University, Semnan, Iran;2. Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran |
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| Abstract: | In this research study, an efficient solid‐phase extraction procedure based on a new organometallic, effective, eco‐friendly and bio‐degradable nanoadsorbent was firstly introduced for influential pre‐concentration of Cu(II), Zn(II), Pb(II), Cd(II) and Mn(II) ions from food and water samples followed by flame atomic absorption spectrophotometric determination. This safe adsorbent consisted of silica nanoparticles chemically functionalized with di‐ethylen tri‐amine (SiO2@NH2NPs); easily prepared via an effective and simple approach. Characterization of SiO2@NH2NPs was subsequently implemented via SEM, FT‐IR and XRD; certifying high quality of the modified nanoadsorbent in terms of size, shape and surface functional groups. The effects of the main factors on the extraction efficiency were then optimized. Efficient extraction of the analytes of interest at neutral media accompanied with the aid of a bio‐compatible organometallic nanoadsorbent can be considered as valuable advantages of the proposed approach. In the optimum conditions, calibration graphs were linear in the range of 4–700 μg l?1, with higher correlation coefficients than 0.997 and limits of detection of 1.45–4.10 ng ml?1. The enrichment factor values were found to be in the span of 120–400. The resultant extraction recovery values were satisfactory; possessing the proper relative standard deviation (%, n = 5) values of 2.05–4.28%. |
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| Keywords: | amine‐functionalized silica nanoparticles food and water samples highly toxic metal ions solid‐phase extraction |
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