β-环糊精对曲拉通X-114紫外光谱抗干扰性能的影响

辛基苯基聚氧乙烯醚（曲拉通X-114）和脂肪醇聚氧乙烯醚（AEO-9）之间的相互作用能对水溶液中曲拉通X-114的紫外光谱产生明显影响。实验结果表明，在200～350nm范围内，曲拉通X-114的最大吸收波长为223nm，AEO-9的紫外吸光度接近于0；在水溶液中，AEO-9能减弱曲拉通X-114的紫外吸光度，降幅达3.4%；AEO-9还能显著降低曲拉通X-114的表观临界胶束浓度（cmc），当AEO-9的浓度从0增加到0.050mmol/L 和0.100mmol/L时，曲拉通X-114的表观cmc从0.219mmol/L分别降至0.207mmol/L和0.202mmol/L。实验结果进一步表明，β-环糊精（β-CD）能有效降低AEO-9对曲拉通X-114的紫外吸光度及表观cmc的影响，在曲拉通 X-114和AEO-9复配水溶液中，按物质的量比1∶1加入β-CD，复配水溶液中曲拉通X-114的回收率从95.8%～103.3%变化至99.0%～100.1%，表明了β-CD能明显降低AEO-9对曲拉通X-114的干扰作用。红外光谱表征结果（FTIR）、核磁共振氢谱表征（¹H NMR）及热重差热分析表征结果（TG-DSC）表明，曲拉通X-114进入β-CD 分子空腔并形成包结物，是阻断曲拉通X-114分子形成混合胶束以及消除AEO对曲拉通X-114的干扰的主要原因。

Effect of β-cyclodextrin on anti-interference performance of Triton X-114 ultraviolet spectrum

The interaction between octyl phenyl polyoxyethylene ether (Triton X-114) and fatty alcohol polyoxyethylene ether (AEO-9) could significantly affect the ultraviolet spectrum of Triton X-114 in aqueous solution. The experimental results indicated that the maximum absorption wavelength of Triton X-114 was 223nm in the range of 200—350nm, and the ultraviolet absorbance of AEO-9 was close to 0. In aqueous solution, AEO-9 can decrease the UV absorbance of Triton X-114 by 3.4%. AEO-9 also significantly decreased the apparent critical micelle concentration (cmc) of Triton X-114 from 0.219mmol/L to 0.207mmol/L and 0.202mmol/L, respectively when the concentration of AEO-9 increased from 0 to 0.050mmol/L and 0.100mmol/L. Experimental results further showed that β-cyclodextrin (β-CD) can effectively reduce the AEO-9 on the ultraviolet absorbance of the Triton X-114 and the influence of apparent cmc. When the Triton X-114 and AEO-9 distribution in aqueous solution with the amount of substance ratio 1∶1 to join the β-CD, the recovery of Triton X-114 in the mixed aqueous solution changed from 95.8%—103.3% to 99.0%—100.1%. It was suggested that the β-CD can significantly reduce the interference of AEO-9 on Triton X-114. The results of Fourier transform infrared spectroscopy analysis (FTIR), nuclearmagnetic resonance hydrogen spectrum (¹H NMR) analysis and thermogravimetric-differential thermal analysis (TG-DSC) showed that Triton X-114 entered β-CD molecular cavity and formed inclusion, which was the main reason for blocking the formation of mixed micelles of Triton X-114 molecule and eliminating the interference of AEO-9 to Triton X-114.