运用太赫兹时域光谱技术定量分析柴油的含硫量

测量柴油样品的太赫兹时域光谱并对其含硫量进行了定量计算.在0.2 ～1.5 THz范围内,柴油的吸收系数随着太赫兹频率和硫含量呈规律性递增.基于这一变化关系建立起了硫含量与太赫兹吸收系数和频率的多元非线性模型,通过测量柴油的太赫兹光谱代入此模型即可计算出柴油的硫含量.这一结果为太赫兹时域光谱技术应用于柴油含硫量的无损快速检测奠定了理论基础,显示出巨大的应用前景.

Quantitative determination of sulfur content in diesel using THz-TDS technology

The frequency-dependent absorption characteristics of diesels with different sulfur content have been studied in the spectral range of 0.2-1.5 THz by the terahertz time-domain spectroscopy (THz-TDS). The absorption coefficient presented a regular change with the THz frequency and sulfur content, and the absorption coefficient increases with the frequency at the same concentration, vice versa. A nonlinear multivariate model was established and the sulfur content in diesel can be confirmed easily by means of the measured THz frequency-dependent absorption coefficient. The results made the quantitative analysis of sulfur content in diesel possible by THz-TDS technology and indicated the bright future in practical application.