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相关概念视频

Flame Photometry: Lab01:16

Flame Photometry: Lab

213
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
213

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Highly Sensitive and Rapid Fluorescence Detection with a Portable FRET Analyzer
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生物度乙气体传感器 低ppbv级别的灵敏度

Kenta Iitani1, Naohiro Ishizuki2, Yuka Matsuhashi1

  • 1Department of Biomedical Devices and Instrumentation, Laboratory for Biomaterials and Bioengineering, Institute of Integrated Research, Institute of Science Tokyo, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.

Analytical chemistry
|December 13, 2024
PubMed
概括

这项研究增强了可穿戴的乙气体传感器,用于早期糖尿病查. 改进的生物嗅探器在检测皮肤气体中微量乙时提供了显著更好的灵敏度.

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科学领域:

  • 生物医学工程 生物医学工程
  • 分析化学 分析化学
  • 医学诊断 医学诊断 医学诊断

背景情况:

  • 呼吸和皮肤中的乙气体表明脂肪酸代谢,与糖尿病相关.
  • 早期糖尿病查需要敏感,持续测量乙气体.
  • 越来越需要用于皮肤乙检测的可穿戴传感器.

研究的目的:

  • 为了提高生物度乙气体传感器 (生物嗅探器) 的灵敏度.
  • 为了使可穿戴,持续监测皮肤气体中微量乙度,用于糖尿病查.

主要方法:

  • 优化的光测量系统和二次性酒精脱酶基生物嗅探器的流细胞.
  • 开发了一种稀释系统,用于准备每十亿体积分 (ppbv) 的亚气体标准.
  • 使用气体染色学-质谱学验证稀释系统的准确性.

主要成果:

  • 稀释系统准确地将乙气准备到0.1ppbv,变化系数为5%.
  • 改进的生物嗅探器在0.5-1000ppbv范围内量化了乙.
  • 实现了比传统传感器优于40倍的下限量化.

结论:

  • 优化的乙生物嗅探器在检测微量乙时具有更高的灵敏度.
  • 这种改进的传感器系统有望用于用于早期糖尿病检测的皮肤乙的持续,可穿戴式监测.