Magnetic extractant with an Fe₃O₄@SiO₂ core and aqueous ammonia coating for microextraction of petroleum acids.

ABSTRACT: Magnetic aqueous ammonia (MAA) was prepared as a magnetic extractant for dispersive microextraction of petroleum acids (PAs). The amount of extractant in MAA was custom-made by a simple approach. In the MAA composed of an aqueous ammonia coating and Fe₃O₄@SiO₂ core, the coating is a base extractant that can selectively extract acids, while the magnetic core serves as a support to achieve dispersion as well as rapid magnetic retrieval of the extractant during the extraction processes. This is the first use of reusable, stable and modifiable Fe₃O₄@SiO₂ as a support instead of bare Fe₃O₄ in a magnetic particle assisted dispersive liquid-liquid microextraction technique. The parameters that affect extractio

SUBMITTER: Zhu GT 

PROVIDER: S-EPMC9080699 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature