通过使用二甲基在水中的物种的测定与一个序列光谱光度离散机器人分析仪
Jerry Dikobe1,2, Funzani Asnath Melato1, Carel Johannes Lombard Adlem2
1Tshwane University of Technology, Department of Chemistry, Private Bag X680, Pretoria, 0001, South Africa.
Heliyon
|August 12, 2024
概括
一种新的机器人方法在环境样本中准确地指定 (III) 和 (VI). 这种快速可靠的技术提供了精确的检测极限和与ICP-MS可比的结果,使其适合常规分析.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 毒理学 毒理学 毒理学
背景情况:
- 的毒性取决于其氧化状态,其中 (VI) 是有毒的, (III) 是必需的.
- 精确的分类对于环境监测和风险评估至关重要.
- 现有的分类分析方法往往是昂贵和复杂的.
研究的目的:
- 开发和验证一种快速可靠的分类分析方法.
- 使用机器人离散分析仪在环境样本中测定 (III) 和 (VI).
- 为了比较开发的方法的性能与已建立的技术,如ICP-MS.
主要方法:
- 使用在线机器人离散分析仪与1,5-二甲基 (DPC) 方法相结合.
- (VI) 直接确定,而 (III) 则通过差异确定.
- 序列分析涉及 (III) 通过 (Ce (IV)) 在线氧化,以确定总.
主要成果:
- 实现了直线校准图表,最高为1mg/L的Cr (VI) 和2mg/L的总Cr (R2>0.999).
- 已证明的低检测极限 (Cr (VI) 的0.004 mg/L,总Cr的0.015 mg/L) 和高精度 (RSD<2%).
- 与经过认证的参考材料显示良好一致,与ICP-MS相比没有显著差异.
结论:
- 开发的机器人离散分析仪方法是精确的,准确的,适合常规的特种化.
- 这种方法为现有的复杂分析技术提供了具有成本效益和可靠的替代方案.
- 该技术在各种环境矩阵中显示出令人满意的选择性和回收率.
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