Methylammonium formate as a mobile phase modifier for totally aqueous reversed-phase liquid chromatography.

Methylammonium formate as a mobile phase modifier for totally aqueous reversed-phase liquid chromatography.
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DOI:
10.1016/j.chroma.2008.09.064
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发表时间:
2009-04-17
期刊:
Journal of chromatography. A
影响因子:
--
通讯作者:
Danielson ND
Danielson ND
中科院分区:
其他
文献类型:
--
作者:
Grossman S;Danielson ND

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Although alkylammonium ionic liquids such as ethylammonium nitrate and ethylammonium formate have been used as mobile phase “solvents” for liquid chromatography (LC), we have shown that methylammonium formate (MAF), in part because of its lower viscosity, can be an effective replacement for methanol (MeOH) in reversed-phase LC. Plots of log retention factor versus the fraction of MeOH and MAF in the mobile phase indicate quite comparable solvent strength slope values of 2.50 and 2.05, respectively. Using a polar endcapped C18 column, furazolidone and nitrofurantoin using 20% MAF-80% water could be separated in 22 min but no baseline separation was possible using MeOH as the modifier, even down to 10%. Suppression of silanol peak broadening effects by MAF is important permitting a baseline separation of pyridoxine, thiamine, and nicotinamide using 5% MAF-95% water at 0.7 mL/min. Using 5% MeOH-95% water, severe peak broadening for thiamine is evident. The compatibility of MAF as a mobile phase modifer for LC with mass spectrometry detection of water soluble vitamins is also shown.
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