On-line pseudo-stationary magnetic solid-phase extraction using magnetic cation exchange microparticles and its application to the determination of strontium

被引：14
作者：
Ayala, Alejandro [1 ]
Takagai, Yoshitaka [1 ,2 ]
机构：
[1] Fukushima Univ, Fac Symbiot Syst Sci, Cluster Sci & Technol, 1 Kanayagawa, Fukushima 9601296, Japan
[2] Fukushima Univ, Inst Environm Radioact, 1 Kanayagawa, Fukushima 9601296, Japan
来源：
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 2018年 / 33卷 / 07期
关键词：
RADIOACTIVE STRONTIUM; INJECTION-ANALYSIS; MASS-SPECTROMETRY; SR-90; QUANTIFICATION; SYSTEM; PRECONCENTRATION; SEPARATION; SAMPLES;
D O I：
10.1039/c8ja00088c
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An on-line magnetic solid-phase extraction (MSPE) system using a micrometer-sized cation exchanger was developed for strontium determination by microwave plasma atomic emission spectrometry (MP-AES). Micro-magnetic silica-based particles chemically immobilizing diethyl sulfone functional groups were pseudo-stationarily placed inside a knotted tube reaction flow-coil under the influence of an external magnetic field from two sandwiched magnets. In this study, the effect on the analytical impact was investigated using Sr as a model analytical target. The adsorption of Sr was carried out under acidic conditions, and its elution was performed with a nitric acid solution followed by MP-AES detection. The calculated detection limit was 0.59 g L-1 with a 10-times sensitivity enhancement factor.
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页码：1251 / 1255
页数：5
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