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相关概念视频

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion03:48

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Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
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相关实验视频

Updated: Jan 18, 2026

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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在细分流量分析中,滴间气体扩散用于的确定.

Xiaodi Yan1, Yiyu Jiang1, Jin Zhang1

  • 1School of Life and Environmental Sciences, Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, 541004, Guangxi, China.

Talanta
|September 12, 2025
PubMed
概括

这项研究引入了一种新的以油为基础的滴滴系统,用于精确的氨测定. 这种创新方法提高了对挥发性化合物的样本分析吞吐量和准确性.

关键词:
氨的确定 氨的确定基于滴滴的流量分析仪化油是指含有的油.气体扩散是指气体的扩散.液体膜是一种液体膜.

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Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
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Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers

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Fast and Accurate Exhaled Breath Ammonia Measurement
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相关实验视频

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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Fast and Accurate Exhaled Breath Ammonia Measurement
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科学领域:

  • 分析化学 分析化学
  • 环境科学 环境科学

背景情况:

  • 氨的确定通常依赖于气体在膜或空气隙间的扩散.
  • 传统方法面临的挑战是样本吞吐量和对复杂矩阵的干扰.

研究的目的:

  • 开发一种新的捐赠油接受液滴系统,以提高氨的确定性.
  • 为改进样本分析创建自动流通分析仪.
  • 评估系统的性能,包括检测极限和干扰缓解.

主要方法:

  • 使用不混合的化油 (例如FC-40) 作为液体膜来细分供体和受体滴.
  • 开发了一种自动流通分析仪,配备了围静微,用于产生配对滴滴.
  • 采用甲醇蓝 (BTB) 来检测吸收和o-phthalaldehyde (OPA) -硫酸盐试剂用于光检测.

主要成果:

  • 已达到14μmol L-1 (吸收) 和2μmol L-1 (光) 的检测极限.
  • 证明土金属的干扰最小.
  • 使用OPA-硫酸盐试剂展示了有效的氨基干扰缓解.

结论:

  • 拟议的基于滴滴的系统为挥发性化合物分析提供了一个创新的和多功能平台.
  • 该系统提高了复杂矩阵中的样本吞吐量和精度.
  • 这种方法为氨的确定提供了一种敏感和选择性的方法.