水中微量甲基膦酸类化合物的树脂富集与 GC/MS分析
ANALYSIS OF METHYLPHOSPHONIC ACIDS IN WATER BY ANION EXCHANGE RESIN ENRICHMENT AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY
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摘要: 本文使用三种阴离子交换树脂(即大孔弱碱型D-301-R、强碱型D-296,201X7)柱对水中微量甲基膦酸类化合物的富集方法进行了研究,含磷毒剂降解产物的水样用气相色谱/质谱法进行定性定量分析,结果表明,D-301-R阴离子交换树脂柱对甲基膦酸的富集回收率高于60％。Abstract: Three anion ion-exchange resins(i. e. D-301-R weak basic,D-296 and 201X7 strong basic respectively) were used for the enrichment of methylphosphonic acids in water. Their degradation products were retained on the resins and eluted with saturated anhydrous HCl/methanol solution, then the eluted solution was methylated with dia-zomethane. Finally, the methylating compounds were identified and quantified by gas chromatography-mass spectrometry (EI mode). It was found that the recovery of methylphosphonic acid in water was over 60% when the macroporous weak alkali anion exchange resin D-301-R was applied in the study.
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