Investigation of adverse effect of coexisting aminopolycarboxylates on the determination of rare earth elements by ICP-MS after solid phase extraction using an iminodiacetate-based chelating-resin
作者： Eiji Fujimori , Suzuka Nagata , Hidetoshi Kumata , Tomonari Umemura
DOI: 10.1016/J.CHEMOSPHERE.2018.09.073
关键词: Sewage treatment 、 Inductively coupled plasma mass spectrometry 、 Rare earth 、 Chelating resin 、 Solid phase extraction 、 Adsorption 、 Iminodiacetic acid 、 Effluent 、 Chemistry 、 Chromatography
摘要: Abstract When iminodiacetic acid chelating-resin solid phase extraction (SPE) was used for the preconcentration of rare earth elements (REEs) in river water samples around sewage treatment plant (STP), low recovery values heavy REEs were observed. In order to find out reason recovery, present paper, organic ligands STP effluent, which may compete with acids, analyzed by GC-NPD. It found that EDTA contained effluent at several-100 nM level and interfered adsorption REEs, especially (present pM level) on due formation stable complexes. Therefore, applied decompose molecules. As a result HNO3 H2O2 170 °C 4 h, all almost quantitatively recovered from SPE good reproducibility. After subsequent 40-times SPE, precisely determined ICP-MS several-10 sub pg mL−1 levels.
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