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文章摘要
太赫兹时域光谱法测定水中重金属离子
Determination of Heavy Metal Ions in Water by Terahertz Time Domain Spectroscopy
  
DOI:
中文关键词:       太赫兹时域光谱法  光学参数计算模型  水质
英文关键词: Hg  Cd  Cu  Terahertz time domain spectroscopy  Optical parameter calculation model  Water quality
基金项目:安徽省科技重大专项“跨界水污染快速预警溯源关键技术及装备研发”基金资助项目(202003a07020010)
作者单位
李梅 清华大学合肥公共安全研究院环境安全研究中心 
刘聪 清华大学合肥公共安全研究院环境安全研究中心 
曹毅 清华大学合肥公共安全研究院环境安全研究中心 
梁漫春 清华大学工程物理系 
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中文摘要:
      采用太赫兹时域光谱法采集溶液时域数据,经过去噪和时域分析,汞、镉、铜离子溶液分别在频率为1.7THz、0.7THz、1.2THz位置上建立线性模型,得到拟合效果最佳的决定系数,分别为0.969、0.896、0.932。该方法检出限为0.001mg/L~0.002mg/L,空白加标样6次测定结果的RSD为2.0%,加标回收率为94.0%~102%。将该方法用于测定某污水处理厂两个进口的实际水样,结果汞离子未检出。
英文摘要:
      Terahertz time domain spectroscopy was used to collect time domain data of solutions. After denoising and time domain analysis, linear models were established for mercury, cadmium and copper ion solutions at frequencies of 1.7 THz, 0.7 THz and 1.2 THz respectively, and the determination coefficients with the best fitting effect were 0.969, 0.896 and 0.932, respectively. The method detection limit were from 0001mg/L to 0.002 mg/L, the RSD of 6 measurements of spiked blank samples was 2.0%, and the recoveries were from 940% to 102%. Applying this method in monitoring practical water samples from two inlets of a sewage treatment plant, mercury ion was not detected.
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