Determination of Mn(II) and Mn(VII) in beverage samples using magnetic dispersive micro-solid phase extraction coupled with solidified floating organic drop microextraction followed by graphite furnace atomic absorption spectrometry
This work was financially supported by the Nature Science Foundation of Hubei Province (No. 2019CFB159) and the Research and Innovation Initiatives of Wuhan Polytechnic University (No. 2018J04 and 2018Y07).
机构署名：
本校为第一机构
院系归属：
食品科学与工程学院
化学与环境工程学院
摘要：
Magnetic dispersive micro-solid phase extraction (MDMSPE) was coupled with solidified floating organic drop microextraction (SFODME) for direct separation and preconcentration of Mn(II) and Mn(VII) before graphite furnace atomic absorption spectrometry determination. MDMSPE involved use of magnetic ZnFe2O4 nanotubes for adsorbing Mn(VII). Sorbent was isolated from aqueous phase by an external magnet. Mn(II) in upper solution from MDMSPE was further enriched by SFODME. This method avoids tedious pre-oxidation/pre-reduction operation and time-con...
