太赫兹技术是信息科学领域迅速发展起来的新兴科技, 太赫兹波与物质之间的相互作用机理有待深入挖掘。在太赫兹光谱测量前需对样品进行预处理, 为利用太赫兹技术进行土壤样品的理化参数研究, 开展了用于太赫兹时域光谱测量的土壤样品压片法制备研究, 分析了压片制备过程中存在的问题, 优化了制备工艺, 并以样品质量(130 mg、180 mg、220 mg、280 mg、330 mg、400 mg)和外界压力(0.5~5 t每隔0.5 t一个压力, 1 t=1 000 kg)为变量进行了适合于太赫兹光谱测量的土壤样品压片制备参数选择的实验探索, 确立了以220 mg/片, 2.5 t压力为土壤样品压片的最佳制备参数。该研究为土壤样品理化参数采用压片法进行后续太赫兹测试实验提供了有效的原始数据, 为其他固体样本制备和太赫兹光谱数据测量提供了科学的方法参考。

Terahertz is an emerging technology developed rapidly in the field of information science. The interaction mechanism between terahertz and material needs further exploration. Solid samples pretreatment is needed before terahertz measurement. In this paper, soil samples were selected for studying tablet-making process for terahertz time-domain spectroscopy measurement. Problems during tablet-making process were analyzed and the process was then optimized. Sample weight(130 mg, 180 mg, 220 mg, 280 mg, 330 mg, 400 mg) and the tablet-making pressure(every 0.5 t between 0.5-5 t, 1 t=1 000 kg) were selected as variables for studying the most suitable parameters for tablet-making for terahertz spectrum measurement. As a research, sample weight at 220 mg/ tablet and tablet-making pressure at 2.5 t were determined as the most suitable parameters. This research provides effective data for Terahertz measurement of soil samples using tablet-making method, and also provides a scientific reference for tablet-making method of other solid sample and THz measurement.