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 μg L⁻¹ with a 10-times sensitivity enhancement factor.

中文翻译：

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在线伪固定使用磁性阳离子交换微粒并将其应用到锶的测定磁性固相萃取†

开发了一种使用微米级阳离子交换剂的在线磁性固相萃取（MSPE）系统，用于通过微波等离子体原子发射光谱法（MP-AES）测定锶。将化学固定有二乙砜官能团的基于微磁性二氧化硅的颗粒假固定地放置在打结的管反应流线圈内，该线圈是在来自两个夹心磁体的外部磁场的影响下形成的。在这项研究中，使用Sr作为模型分析目标，研究了对分析影响的影响。Sr的吸附在酸性条件下进行，用硝酸溶液洗脱，然后进行MP-AES检测。计算出的检出限为0.59μgL ^-1，灵敏度提高倍数为10倍。