超声波辅助的离子液微提取和色度分析,用于在环境和地质样本中微量检测微量黄金
Fahad M Alminderej1, Alaa M Younis1, Alaa S Amin2
1Department of Chemistry, College of Science, Qassim University, Buraidah, 51452, Saudi Arabia.
Analytical methods : advancing methods and applications
|July 29, 2025
概括
一种新的方法使用超声波辅助的离子液微提取和色度测量来检测各种样品中的金离子 (Au3+). 这种精确的技术为黄金分析提供了高灵敏度和选择性.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 准确而敏感地检测金离子 (Au3+) 对于环境监测和资源分析至关重要.
- 现有的金离子分析方法往往需要复杂的程序或缺乏足够的灵敏度和选择性.
- 开发快速,高效和成本效益的黄金分析技术是一个持续的挑战.
研究的目的:
- 开发一种新的,精确的,有针对性的方法来隔离,预先缩和分析各种样本矩阵中的金离子.
- 为分析应用引入和验证一种新的黄金特定合剂,即2-amino-4-(m-tolylazo) pyridine-3-ol (ATAP).
- 建立一个高效的提取和色度检测系统,用于微量Au3+.
主要方法:
- 超声波辅助的分散液体-液体微提取 (UA-DLLME) 使用离子液体1-octyl-3-methylimidazolium bis ((三甲基硫) 胺.
- 使用了2-amino-4-(m-tolylazo) pyridine-3-ol (ATAP) 作为一种新的,针对黄金的化剂.
- 在提取和缩后对金-ATAP复合物的色度检测.
主要成果:
- 实现了Au3+的线性动态范围,从4.0到240 ng mL-1以高吸收率.
- 获得了非常好的量化和检测极限,分别为3.92和1.30 ng mL-1,预度系数为500.
- 证明了高灵敏度 (桑德尔灵敏度为0.016 ng cm-2),选择性和其他离子的最小干扰,相对标准偏差低 (1.89%).
结论:
- 拟议的UA-DLLME方法与ATAP和色度检测相结合,是Au3+的快速,简单和高效的分析方法.
- 该技术适用于环境,地质和食品样本中的金离子的选择性分离和定量.
- 这种方法在微量黄金分析中提供了显著的进步,利用最小的溶剂量并提供可靠的结果.
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