多功能LIBS校准方法使用金属:SPADNS/DTAB离子对在摄影纸上固定固定
Lucas R M Domingos1, Maria Isadora P Lima1, Samara Soares2
1Human and Natural Sciences Center, Federal University of ABC, Santo André, SP, Brazil.
Talanta
|July 27, 2025
概括
使用摄影纸开发了一种新的校准材料,用于激光诱导分解光谱 (LIBS). 这种材料可以在最少的准备工作中对各种样本进行准确的多元元素分析,克服了定量LIBS应用中的一个关键挑战.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学方法.
- 材料科学 材料科学 材料科学
背景情况:
- 激光诱导分解光谱 (LIBS) 是一种多功能技术,用于在最小样本准备的情况下进行元素分析.
- 常规定量LIBS的一个重大限制是由于微量采样而缺乏适当的校准材料.
- 开发稳定可靠的校准标准对于推进LIBS应用至关重要.
研究的目的:
- 为激光诱导分解光谱 (LIBS) 开发一种新的多元素校准材料.
- 使用摄影纸作为固定金属离子的固体基板.
- 通过各种样本矩阵验证开发材料的有效性,用于对各种样本矩阵进行定量分析.
主要方法:
- 摄影纸被浸入含有Al,Co,Cr,Cu,Mn和Zn离子的溶液中,并与SPADNS和DTAB复合.
- 优化吸附条件包括SPADNS和DTAB的特定度,pH 8.0酸盐缓冲区和超声波处理.
- 使用优化的参数进行LIBS分析:150mJ激光能量,7脉冲,2.5μs延迟和13μs整合时间.
主要成果:
- 开发的校准材料显示了Al,Cr,Mn,Zn (0.50-10.0毫克L-1),Co (1.0-10.0毫克L-1),Cu (0.50-5.0毫克L-1) 的线性响应范围.
- 精度从4.2%到28%不等,显示出良好的可重复性.
- 对经过认证的参考材料 (水,血清,油,指甲油,墨水) 的分析显示,回收率高 (81-123%) 和相对误差低 (0.40-25%).
结论:
- 基于摄影纸的多元素材料对于定量LIBS分析是有效的.
- 该材料在各种样品类型中表现出广泛的适用性,无需大量的样品准备.
- 这一发展解决了在常规LIBS应用中对合适的校准标准的关键需求.
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