双(4-羧苯基)苯基氧化膦的定性定量分析

Qualitative and Quantitative Analysis of Bis-(4-Carboxyphenyl)-phenylphosphine Oxide

摘要: 用差示扫描量热、元素分析、红外光谱、氢核磁共振等方法对自制双(4-羧苯基)苯基氧化膦(BCPPO)进行定性分析.其结构和纯度经确认后,紫外光谱扫描发现:BCPPO的吡啶溶液在302 nm波长处有稳定吸收,在6.0×10-5~3.6×10-3mol·L-1之间,吸光度与浓度呈线性关系.应用紫外-分光光度法对BCPPO进行定量分析时,相对标准偏差(n=5)在0.14%~0.25%之间,可有效避免反应副产物苯甲酸对测定的影响.

Abstract: The fire retardant,bis-(4-carboxyphenyl)-phenylphosphine oxide (BCPPO) was synthesized and its structure and purity were characterized by DSC,FT-IRS,1HNMR and elementary analysis.As shown in the UV-absorption spectrum,absorption maximum of BCPPO in pyridine solution was found at the wavelength of 302 nm.Linear relationship between values of absorbance and concentration of BCPPO was obtained in the range of 6.0×10-5-3.6×10-3mol·L-1.Based on these facts,UV-spectrophotometry was proposed for the determination of BCPPO,and RSD′s (n=5) were found in the range of 0.14%-0.25%.The interference of benzoic acid,a by-product of the synthesis,was avoided by this method.