液体イオン化質量分析法によるポリオキシメチレングリコール水溶液とアルコールの反応の解析(<特集>質量分析法の応用技術)

概要

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Reactions between poly (oxymethylene) glycols (POMGs) in aqueous solution and methanol or ethanol, which were closely to the reactions occurring in an aqueous solution of formaldehyde, were studied by liquid ionization mass spectrometry. Hemiformalization of POMGs proceeded soon after methanol addition to form monomethylethers of POMGs and completed within 15 min. In contrast, hemiformalization by the ethanol addition proceeded slowly. About 30 min is needed to produce monomethylethers of POMGs. Most ions of POMGs observed in aqueous solution, as well as the abundant monomethylether of POMG ions obtained upon mixing with methanol, were hydrated. In contrast, only a few ions of monoethylethers of POMGs were hydrated. These results suggest that methanol is able to react directly with hydrated POMGs, while the water molecules in a hydrated POMG must replaced replaced with ethanol molecules prior to the formation of the monoethylether derivatives.
社団法人日本分析化学会の論文
1996-06-05