通过WD-XRF在地质样本中估计的快速方法,使用As-Pb度等价的新概念
Subhendu Ghosh1, Ashok Kumar Maurya2,3, Piyali Deb Barman1
1Geological Survey of India, Eastern Region, Salt Lake Sector II, Kolkata, 700091, India.
概括
一种新的方法可以准确地确定地质样本中的,即使含量高. 这种快速波长分散的X射线光技术克服了可靠的分析的光谱重叠.
科学领域:
- 地质化学 地质化学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 地下水中的是全球环境和健康问题,因为它的毒性.
- 地质源,主要是岩石和土壤的气候变化,有助于污染.
- 在地质矩阵中精确确定对于环境监测和风险评估至关重要.
研究的目的:
- 开发一种快速准确的方法来确定固体地质样本中的 (As).
- 为了克服在X射线光分析中和 (Pb) 之间的光谱线重叠的挑战.
- 为量化提供可靠的分析技术,特别是在含度高的样本中.
主要方法:
- 使用波长分散式X射线光学 (WDXRF) 谱法进行元素分析.
- 采用强烈的AsKα1,2X射线光线,以实现最佳的检测下限 (LLD).
- 引入了一种新的-度等价系数,以解决AsKα1,2和PbLα1,2的光谱重叠问题.
主要成果:
- 拟议的方法有效地绕过了和之间的光谱线重叠问题.
- 使用22种国际认证的参考材料进行验证,证明了高精度,只有一个值超过20%的相对误差.
- 该方法成功量化了低于5毫克/公斤的,而度高达1000毫克/公斤.
结论:
- 开发的WDXRF方法提供了一种快速,准确和通用的方法,用于在各种地质矩阵中确定.
- 新的等价系数方法显著改善了富含样本中的量化,克服了传统校正方法的局限性.
- 这种技术为环境监测和与污染有关的地质调查提供了有价值的工具.
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