大气氧化测量的可追溯校准
Tyler R Elgiar1, Seth N Lyman1,2, Teodor D Andron3,4
1Bingham Research Center, Utah State University, Vernal, Utah 84078, United States.
Environmental science & technology
|June 8, 2024
概括
现在可以准确测量氧化. 一个新的双通道系统,通过SI可追溯校准验证,可实现环境空气中氧化的可靠检测.
科学领域:
- 环境化学环境化学
- 大气科学 大气科学
- 水银监测监测 水银监测
背景情况:
- 以前的氧化测量结果存在低偏差.
- 精确量化氧化对环境研究至关重要.
研究的目的:
- 开发和验证一种新的氧化测量系统.
- 评估低环境度下氧化检测的准确性.
主要方法:
- 部署一个具有低检测极限 (6-12 pg m−3) 的双通道系统.
- 使用基于透管的自动校准器,具有SI可追溯的特征.
- 用SI可追溯的重力测量和气体染色学/质谱法方法比较结果.
主要成果:
- 双通道系统显示了元素 (97 ± 4%) 和HgBr2 (100 ± 8%) 的高回收率.
- 新系统的测量结果与独立的SI可追溯方法可比.
- 科罗拉多州Steamboat Springs系统的现场验证成功.
结论:
- 准确的,常规校准的氧化测量在环境空气中是可以实现的.
- 本研究介绍了使用SI可追溯校准系统在低度下对氧化的首次现场验证测量.
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