Size exclusion chromatography with UV detection coupled to on-line 1H-NMR and on-line collection via a dedicated interface for subsequent off-line FT-IR

M. Ludlow, D. Louden, A. Taylor, B. Wright, I. Wilson
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引用次数: 9

Abstract

The coupling of size exclusion chromatography (SEC) to on-line NMR spectroscopy and a dedicated interface for the collection of the chromatographic eluent for subsequent FT-IR has been investigated using a number of polymer additives as model compounds. SEC was performed using deuterated chloroform as eluent with the separation monitored on-line by UV detection at 254 nm and on-flow 1H-NMR. The effluent from the NMR probe was directed to a dedicated HPLC/FT-IR interface where it was deposited on a germanium plate. FT-NMR and FT-IR spectra were successfully obtained for 2,6-di-tert-butyl-4-methylphenol (BHT), octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (Irganox 1076) and di-iso-octylphthalate.
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尺寸排除色谱与紫外检测耦合在线1H-NMR和在线收集通过专用接口随后离线FT-IR
采用多种聚合物添加剂作为模型化合物,研究了粒径排除色谱(SEC)与在线核磁共振光谱的耦合以及用于收集色谱洗脱液的专用界面。以氘化氯仿为洗脱液,采用254 nm紫外检测和恒流1H-NMR在线监测分离情况。从核磁共振探针流出的废水被引导到专用的HPLC/FT-IR界面,在那里它被沉积在锗板上。成功地获得了2,6-二叔丁基-4-甲基苯酚(BHT)、十八烷基-3-(3,5-二叔丁基-4-羟基苯基)丙酸酯(Irganox 1076)和邻苯二甲酸二异辛基酯的FT-NMR和FT-IR光谱。
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