Khayatian, Hassanpoor, Nasiri, Zolali, 2012. Preconcentration, determination and speciation of iron by solid-phase extraction using dimethyl (E)-2-[(Z)-1-acetyl)-2-hydroxy-1-propenyl]-2-butenedioate 35.. https://doi.org/10.1590/s0100-40422012000300018