Synthesis of MIL۱۰۱@ZIF۶۷@ZIF۸ Hybrid Nanostructure as a New Sorbent in Thin Film Microextraction for the Extraction and Measurement of Pb۲+ and Cd۲+ Metal Ions in Water and Cosmetics Samples by Flame Atomic Absorption Spectroscopy

In this study, a new sorbent was synthesized based on the in-situ growth of the combined ZIF-۶۷ and ZIF-۸ on the surface of MIL۱۰۱. Finally, the adsorbent was made into a thin film with the help of polyvinylidene difluoride polymer and was used in the TFME technique for the simultaneous measurement of cadmium and lead metals in aqueous and cosmetic samples by means of flame atomic absorption spectroscopy. In order to achieve maximum efficiency and sensitivity, parameters affecting the extraction and desorption processes were optimized. Under the optimized condition, the linearity of the method, the limit of detections (LODs), the limit of quantifications (LOQs), the relative standard deviations (RSDs%), and enrichment factors (EFs) were equal with ۰.۲–۱۵۰.۰ µg L-۱, ۰.۰۵۹۶۸-۰.۱۵۹۶۸ µg L-۱, ۰.۱۹۸۰۰-۰.۴۷۹۰۳ µg L-۱, ۱.۲ to ۲.۵% and ۷۳ - ۷۵, in water matrix, respectively. Then the optimal conditions for Pb and Cd were used in water and cosmetics samples by flame atomic absorption spectroscopy and acceptable results were obtained.

کلیدواژه ها:

Hybrid MIL۱۰۱@ZIF۸@ZIF۶۷ ، TFME ، Pb ، Cd ، Flame atomic absorption spectroscopy