フルフラールジエチルアセタール類のガスクロマトグラフィー : 農薬および関連化合物の分析に関する研究(第22報)

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Separation and determination of ring substituted furfural diethyl acetal derivatives have been carried out by gas chromatography (GC). Diethyl acetal derivatives of furfurals seemed to decompose on the usual columns of GC and their peaks were not detected. But, when sodium tetraborate or phosphate buffer component between pH 7.5 and 10.5 was coated on the supporter and DEGS was used as a liquid phase, fine chromatograms of acetals were obtained and they were separated from parent furfurals and other acetals. Acetals used for experiments were furfural diethyl acetal, 5-chloromethylfurfural diethyl acetal, 5-ethoxymethylfurfural diethyl acetal and 5-propagylfurfural diethyl acetal. GC operating conditions were as follows. Apparatus: Yanagimoto GCG-550 with FID; column: glass, 1.5 m in length and 3 mm in diameter; column packing: 6080 mesh, acid-washed and silanized Chromosorb W coated with 3 % sodium tetraborate and 10% DEGS; column temperature: 130°C; carrier: nitrogen, 15 m<I>l</I>/min.
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