开发一种分散液-液微提取技术,用于使用原子吸收光谱法在环境样本中超敏感检测黄金
Waheed Ali Soomro1, Muhammad Yar Khuhawar2, Taj Muhammad Jahangir2
1Institute of Advanced Research Studies Chemical Sciences, University of Sindh, Jamshoro, Sindh, Pakistan. waheedsoomro88@yahoo.com.
Environmental monitoring and assessment
|February 4, 2025
概括
本研究引入了一种新的方法,用于检测环境样本中的黄金 (Au III),使用分散液液微提取 (DLLME) 和先进光谱学. 该技术在各种样本类型中提供高灵敏度和精度的黄金确定.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 频谱学是一种光谱学.
背景情况:
- 在环境样本中确定黄金对于监测污染和资源评估至关重要.
- 现有的方法可能缺乏灵敏度或需要复杂的程序.
- 分散液-液微提取 (DLLME) 为样本预缩提供了一个有前途的方法.
研究的目的:
- 开发和优化用于分离和确定金 (Au III) 离子的DLLME方法.
- 在各种环境和工业样本中应用量化黄金的方法.
- 为了验证该方法的性能,使用火焰原子吸收光谱 (FAAS) 和感应合等离子光学发射光谱 (ICP-OES).
主要方法:
- 分散液体-液体微提取 (DLLME) 结合化剂bis ((salicylaldehyde) 乙二胺 (H2SA2en).
- 使用单变量和多变量技术优化提取参数 (pH,试剂度,溶剂,溶剂体积).
- 使用火焰原子吸收光谱法 (FAAS) 和感应合等离子光学发射光谱法 (ICP-OES) 量化黄金.
主要成果:
- 通过DLLME方法实现了Au (III) 离子的高提取效率.
- 在2-12μg/L范围内观察到出色的线性 (R2 = 0.997).
- 低检测 (1μg/L) 和量化 (3μg/L) 极限得到实现,预度和丰富系数分别为44和47.
- 证明了高精度和可重复性 (0.417-3.56%).
- 成功应用于现实世界样本,包括河流沉积物,工业废水和黄金饰品.
结论:
- 拟议的DLLME方法对环境和工业样本中的黄金确定具有敏感性,快速性和有效性.
- 该方法为黄金分析提供了可靠的替代方案,通过与ICP-OES进行比较来验证.
- 这种方法提高了在复杂矩阵中准确监测黄金的能力.
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