矩阵的复杂性对白金组金属确定变化的影响,使用ICP OES和校正方法:用过的催化剂作为案例研究
Ha Bich Trinh1, Seunghyun Kim1, Taehun Son1
1Department of Integrated Energy and Infra System, Kangwon National University, Chuncheon-si, Kangwon-do 24341, Republic of Korea.
ACS omega
|September 23, 2024
概括
从使用过的催化剂中回收类金属 (PGM) 对可持续金至关重要. 一种新的微波消化和多变量校准方法准确地确定PGM,最大限度地减少其他元素的干扰.
科学领域:
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
背景情况:
- 关键金属的可持续金依赖于从使用过的催化剂中有效回收组金属 (PGM).
- 准确可靠的分析方法对于确定复杂矩阵中的PGM含量至关重要.
- 感应合等离子光辐射光谱法 (ICP-OES) 中的元素间效应可以显著影响PGM的确定.
研究的目的:
- 研究微波辅助消化和多变量校准程序,以确定消耗催化剂中的PGM.
- 通过ICP-OES评估介质元素 (Al,Mg,Ce,Na) 对PGM测定的影响.
- 评估开发的分析程序的可靠性和准确性.
主要方法:
- 微波辅助消化用于样品制备.
- 感应合等离子光学发射光谱 (ICP-OES) 用于元素分析.
- 多变量校准和多线性回归模型,以考虑元素间效应.
主要成果:
- 微波消化有效地溶解了含有PGM的复杂催化剂样本.
- 诸如Al,Mg,Ce和Na这样的介质元素在PGM确定中引起了显著的变化 (Pt/Pd为-30%,Rh为+20%).
- 多变量校准降低了Pt (从>10%到<3.5%) 和Pd (从8.0%到2.6%) 的预测标准误差,对Rh.
- 可重复性和可重复性研究证实了分析程序的可靠性,所有PGM的GR&R总贡献值是可以接受的.
结论:
- 微波辅助消化与多变量校准相结合,提供了一种高效可靠的方法来确定消耗催化剂中的PGM.
- 这种方法有效地减轻了元素间干扰,使复杂矩阵的准确分析成为可能.
- 开发的方法适用于可持续的金和重复利用关键的PGMs.
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