A fluoro versus a nitro derivative-a high-performance liquid chromatography study of two basic analytes with different reversed phases and silica phases as basis for the separation of a positron emission tomography radiotracer.

A fluoro versus a nitro derivative-a high-performance liquid chromatography study of two basic analytes with different reversed phases and silica phases as basis for the separation of a positron emission tomography radiotracer.
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氟与硝基衍生物 - 两种具有不同反相和二氧化硅相的基本分析物的高效液相色谱研究,作为正电子发射断层扫描放射性示踪剂分离的基础

DOI:
10.1016/j.chroma.2013.08.068
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发表时间:
2013
期刊:
Journal of chromatography. A
影响因子:
--
通讯作者:
Steinbach J
Steinbach J
中科院分区:
--
文献类型:
--
作者:
Wenzel B;Günther R;Brust P;Steinbach J

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为了开发用于将a18 F标记的PET放射性示踪剂与其硝基前体分离的基础,我们使用未标记的参考化合物和相应的硝基前体进行了分析HPLC研究。本研究的目的是找到一种分离方法,其中氟代衍生物在硝基前体前面洗脱,具有适当的分离参数。几个RP相以及裸硅胶柱进行了研究,与乙腈和甲醇作为有机改性剂和水溶液NH 4 OAc,因为分析物的基本特性。基于不同的相互作用机制,观察到四种类型的分离。当ACN/20 mM NH40Ac aq.主要采用阳离子交换和疏水相互作用有助于保留。可以观察到从95%ACN开始的洗脱顺序的反转,随后增加水含量。这种现象被观察到的所有RP阶段,似乎是独立的不同的间隔键合到二氧化硅。相比之下,使用MeOH/20 mM NH 4 〇 Ac aq.洗脱顺序取决于相材料。与其他RP相相比,具有执行π-π相互作用潜力的两个柱显示出不同的分离行为。
To develop a basis for the separation of a18F-labeled PET radiotracer from its nitro precursor, we performed an analytical HPLC study using the unlabeled reference compound and the corresponding nitro precursor. Aim of the study was to find a separation in which the fluoro derivative elutes in front of the nitro precursor with appropriate separation parameters. Several RP phases as well as a bare silica column were investigated with ACN and MeOH as organic modifiers and aqueous NH4OAc because of the basic character of the analytes. Four types of separation were observed based on different interaction mechanisms. When ACN/20 mM NH4OAc aq. was used mainly cationic-exchange and hydrophobic interactions contributed to the retention. A reversal of elution order could be observed starting from 95% ACN and subsequent increasing of the water content. This phenomenon was observed for all RP phases and seems to be independent of the different spacers bound to the silica. By contrast, using MeOH/20 mM NH4OAc aq. the elution order depends on the phase material. Two columns with the potential to perform π–π interactions showed different separation behavior compared to the other RP phases.
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