电感耦合等离子体原子发射光谱的现代谱估计

Modern Spectral Estimation of ICP-AES

用现代谱估计方法对电感耦合等离子体原子发射光谱 (ICP- AES)及其信号特性作了讨论。本工作用现代谱估计技术中的自回归模型 (AR)方法计算功率谱。采用 L evinson- Durbin递归算法计算 AR模型的参数 ,然后用这些参数计算功率谱。用实际的 ICP- AES光谱和测量信号所得的结果表明 ,采用谱估计方法可以对 ICP- AES光谱的频率构成和分析特性作进一步深入的理解。

The inductively coupled plasma atomic emission s pectrometry (ICP-AES) and its signal characteristics were discussed using moder n spectral estimation technique.The power spectra density (PSD) was calculated u sing the auto-regression (AR) model of modern spectra estimation.The Levinson- Durbin recursion method was used to estimate the model parameters which were use d for the PSD computation.The results obtained with actual ICP-AES spectra and measurements showed that the spectral estimation technique was helpful for the b etter understanding about spectral composition and signal characteristics.