In the present study, homogeneous liquid-liquid microextraction via flotation assistance method is described for preconcentration of trace amounts of Mn(II). 1-(2-pyridylazo)-2-naphthol (PAN) is used as a ligand. The enriched analyte in the floated organic phase has been determined by inductively coupled plasma-mass spectrometry (ICP-MS). In this work, low density organic solvent is used and there is no need of centrifugation. Several factors influencing the microextraction efficiency, such as pH, the amount of chelating agent, nature and volume of extraction and homogeneous solvents have been investigated and optimized. Under the optimum conditions, the linear dynamic range is 1.0-500.0 ng L^-1 with a correlation coefficient of 0.9998 and the detection limit of 0.1 ng L^-1. The proposed method has been successfully applied for separation and determination of manganese in different water samples.

中文翻译：

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气浮助剂进行均相液-液微萃取，用于在电感耦合等离子体质谱法之前测定痕量锰

在本研究中，描述了通过浮选辅助方法进行均相液-液微萃取来预富集痕量的Mn（II）。1-（2-吡啶基偶氮）-2-萘酚（PAN）用作配体。浮选有机相中富集的分析物已通过电感耦合等离子体质谱法（ICP-MS）测定。在这项工作中，使用了低密度的有机溶剂，并且不需要离心。已经研究和优化了影响微萃取效率的几个因素，例如pH，螯合剂的量，萃取的性质和体积以及均相溶剂。在最佳条件下，线性动态范围为1.0-500.0 ng L ^-1，相关系数为0.9998，检测极限为0.1 ng L ^-1。该方法已成功应用于不同水样中锰的分离与测定。