基于太赫兹时域光谱的塑化剂定量分析

发布时间：2018-03-30 03:42

本文选题：光谱学　切入点：定量分析　出处：《激光与光电子学进展》2017年03期

【摘要】：利用太赫兹时域光谱结合化学计量学对塑化剂定量检测技术进行了研究。提出了一种利用太赫兹透射光谱测量超薄液体样品光学常数的新方法。利用该方法,以一种典型塑化剂——邻苯二甲酸二丁酯(DBP)为例,采用内径为200μm的比色皿作为样品载体测量了不同浓度DBP-无水乙醇和DBP-乙醇-水溶液在太赫兹波段下的折射率和吸收系数。结果表明随着DBP含量的增加,DBP-乙醇溶液和DBP-乙醇-水溶液在太赫兹波段(0.2~1.1THz)的光学参数随DBP浓度均呈有规律的变化。根据吸收系数面积、平均折射率相对DBP浓度变化曲线建立了未知溶液DBP含量的预测模型。该研究表明太赫兹时域光谱技术可能成为快速检测白酒等含乙醇饮料中塑化剂含量的新方法。
[Abstract]:A new method for measuring the optical constants of ultra-thin liquid samples using terahertz transmission spectroscopy was proposed, which was used to measure the optical constants of ultra-thin liquid samples by means of terahertz time-domain spectroscopy and chemometrics. A typical plasticizer, dibutyl phthalate (DBP), was used as an example. The refractive index and absorption coefficient of DBP- anhydrous ethanol and DBP- ethanol-aqueous solution with different concentrations of DBP- anhydrous ethanol and DBP- ethanol-aqueous solution in terahertz band were measured by using a colorimetric plate with an inner diameter of 200 渭 m. The results show that with the increase of DBP content, the refractive index and absorption coefficient of DBP- ethanol solution are measured. The optical parameters of DBP- ethanol-aqueous solution vary regularly with the concentration of DBP in the terahertz band of 0.2 ~ 1.1THz. according to the absorption coefficient area, The prediction model of DBP content in unknown solution was established by the curve of average refractive index relative to DBP concentration. This study indicates that terahertz time-domain spectroscopy may be a new method for rapid detection of plasticizer content in alcoholic beverages such as liquor.
【作者单位】：贵阳职业技术学院生化工程系;贵州省计量测试院;
【基金】：国家自然科学基金(21503045) 贵州省科学基金(J20142107) 贵阳职业技术学院科研项目(GYZGY2016YB-36)
【分类号】：O657.3;TS207.3

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