%0 Journal Article %A mortazavi nik, vahid, kanoz, elahe, Feizbakhsh, Alireza, Mehrdad Sharif, Amir Abdullah %T Microextraction and preconcentration of nickel in chocolate samples by SrFe12O19@CTAB magnetic nanoparticles and determination by electrothermal atomic absorption spectroscopy %J Journal of applied research in chemisry %V 15 %N 4 %P 118-132 %D 2022 %R 10.30495/jacr.2022.689065 %U https://sanad.iau.ir/fa/Article/1044722