等离子图像校准双脉冲激光诱导分解光谱用于在地质矩阵中高精度量化轻稀土元素的高精度量化
Xueying Jin1,2, Ye Zhan3, Zhongjie Xu4
1College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China.
Analytical chemistry
|September 17, 2025
概括
一种新的双脉冲激光诱导分解光谱 (DP-LIBS) 方法使用等离子体成像来准确地分析地质样本中的轻稀土元素 (LREEs). 这种方法克服了用于精确量化微量元素的矩阵效应.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学.
- 地质化学 地质化学
背景情况:
- 精确量化轻稀土元素 (LREEs) 对高科技行业,资源勘探和环境监测至关重要.
- 传统的激光诱导分解光谱 (LIBS) 面临着矩阵效应和光谱干扰的挑战,限制了地质样本中低度LREEs的准确性.
研究的目的:
- 开发和验证一种新的光谱校准方法,用于在复杂的地质矩阵中对LREEs进行增强的定量分析.
- 为了提高LREEs的精度和降低LREEs的检测极限,使用与等离子体成像集成的双脉冲LIBS (DP-LIBS) 技术.
主要方法:
- 采用双脉冲激光诱导分解光谱 (DP-LIBS) 来提高微量元素的光谱强度.
- 使用ICCD摄像头同时进行等离子体成像和光谱采集.
- 开发了一种校准方法,将等离子体温度与图像亮度相关联,以纠正光谱信号.
主要成果:
- 在光谱校准后,在LREEs中达到高达99.86%的确定系数 (R2).
- 获得了0.10的低平方根平均误差 (RMSE) 和0.95%的最佳相对标准偏差 (RSD) (Pr).
- 对于一些LREEs,降低了检测极限 (LODs),欧盟的值低至0.57 ppm.
结论:
- 拟议的DP-LIBS光谱校准方法有效地抑制了复杂地质样本中的矩阵效应.
- 这种技术为微量LREEs的超精确定量分析提供了一个新范式,克服了传统LIBS的局限性.
- 该方法表现出高精度和灵敏度,适用于资源勘探和生态监测应用.
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