Furukawa Mai, Tateishi Ikki, Katsumata Hideyuki, Kusunoki Risako, Kaneco Satoshi
Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan.
Global Environment Center for Education & Research, Mie University, Tsu, Mie, 514-8507, Japan.
Anal Sci. 2020 Jan 10;36(1):87-90. doi: 10.2116/analsci.19SAN01. Epub 2019 Nov 29.
A preconcentration technique with a magnetite-kaolin adsorbent capable of magnetic separation was developed for the determination of rhodium in environmental samples. The magnetite-kaolin nanocomposite was prepared for the preconcentration of rhodium in an aqueous solution prior to an electrothermal atomic absorption spectrometric determination. The detection limit (3S/N) of rhodium was 16 pg mL under the optimum conditions. Even though matrix elements existed in 10 fold excess in aqueous solution, the rhodium adsorption could be not affected by the matrix. The present method could be applied to the determination of Rh in an aqueous solution. The advantages are easy preparation of the adsorbent and fast magnetic separation.
开发了一种采用具有磁分离能力的磁铁矿-高岭土吸附剂的预富集技术，用于测定环境样品中的铑。制备了磁铁矿-高岭土纳米复合材料，用于在电热原子吸收光谱测定之前对水溶液中的铑进行预富集。在最佳条件下，铑的检测限（3S/N）为16 pg/mL。即使水溶液中基体元素的含量超过10倍，铑的吸附也不会受到基体的影响。本方法可用于水溶液中铑的测定。其优点是吸附剂制备简便且磁分离速度快。
