فهرست نشریات علمی دسترسی آزاد ایران

In our study, we developed a novel magnetic-solid-phase extraction (mag-SPE) sorbent by using NiFe2O4 nanoparticles (NPs) as a magnetic core, with HKUST-1 serving as the metal-organic framework (MOF) shell. Sorbent was fabricated using the Pechini method and characterized and confirmed through various techniques. Following characterization, the synthesized mag-SPE sorbent was combined with Flame Atomic Absorption Spectroscopy (FAAS) to determine and quantify heavy metals (Pb, Cd, and Hg) in various cosmetic product samples available in the Iranian market. We studied the effect of various variables to determine the optimal extraction conditions. The concentration was assessed over a linear range under these optimized conditions: 0.5-1700 µg L−1 for Pb, 1-1500 µg L−1 for Cd, and 1-2000 µg L−1 for Hg. The R2 values were 0.99992, 0.99746, and 0.99547, respectively. The LOD (signal (S) to noise (N) = 3) and LOQ (S/N=10) for Pb were 0.147 µg L−1 and 0.492 µg L−1, for Cd they were 0.162 µg L−1 and 0.541 µg L−1, and for Hg they were 0.294 µg L−1 and 0.981 µg L−1. Moreover, the relative standard deviation (RSD) for Pb, Cd, and Hg were 1.24%, 1.22%, and 1.15%, respectively. Finally, we used the mag-SPE-FAAS method to measure the levels of Pb, Hg, and Cd in various cosmetic samples, including 8 foreign and 7 domestic brands of lipsticks, eye shadows, and hair colors. The results were then analyzed separately for each cosmetic sample and compared between the foreign and domestic brands.