Impact of Ionic Strength of Carrier Liquid on Recovery in Flow Field-Flow Fractionation.

Impact of Ionic Strength of Carrier Liquid on Recovery in Flow Field-Flow Fractionation.
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DOI:
10.1007/s10337-018-3551-z
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发表时间:
2018
期刊:
影响因子:
1.7
通讯作者:
Buszewski B
Buszewski B
中科院分区:
化学4区
文献类型:
--
作者:
Kowalkowski T;Sugajski M;Buszewski B

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不对称流场流分离(AF 4)和中空纤维流场流分离(HF 5)是分析、工业和生物分析中广泛应用的技术。所有AF 4和HF 5分析中的主要问题是由于分析物-膜相互作用导致的样品损失。在这项工作中,液体载体的组成对胶乳纳米粒子(NPs)的分离在水中和两个不同浓度的NH 4 NO3的影响进行了研究。在AF 4中,已经观察到由载液的离子强度引起的60和121.9 nm颗粒的尺寸减小的恒定趋势。相反,当增加离子强度时,观察到最大的356 nm颗粒的附聚效应,这导致回收率显著下降至35%。H5 F提供了更好的分辨率和强化的NP峰,但必须仔细优化系统参数以获得良好的分离。
Asymmetrical flow field-flow fractionation (AF4) and hollow-fiber flow field-flow fractionation (HF5) are techniques widely used in analytical, industrial and biological analyses. The main problem in all AF4 and HF5 analyses is sample loss due to analyte–membrane interactions. In this work the impact of liquid carrier composition on latex nanoparticles (NPs) separation in water and two different concentrations of NH4NO3 was studied. In AF4, a constant trend of decreasing the size of 60 and 121.9 nm particles induced by the ionic strength of the carrier liquid has been observed. In contrast, an agglomeration effect of the biggest 356 nm particles was observed when increasing ionic strength, which induced a significant drop of recovery to 35%. H5F provides better resolution and intensified peaks of NPs, but careful optimisation of system parameters is mandatory to obtain good separation.
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