用短波红外微光谱仪 (SWIR) 在零度以下温度下测量水旋放松时间
1Department of Mechanical Engineering, Graduate School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Japan.
概括
短波红外光谱 (SWIR) 现在可以测量水的水分.
科学领域:
- 物理化学 物理化学
- 频谱学是一种光谱学.
- 材料科学 材料科学 材料科学
背景情况:
- 短波红外光谱 (SWIR) 是确定水的旋转放松时间 (RRTW) 的关键技术.
- 由于依赖纯水作为参考,目前的SWIR方法在0°C以上的温度上是有限的.
- 这种限制限制了SWIR在零度以下温度环境中的应用.
研究的目的:
- 为了扩大RRTW的SWIR测量的温度范围.
- 为了能够在低于0°C的样本中准确地确定RRTW.
- 为了验证SWIR的替代参考解决方案方法.
主要方法:
- 使用了低于0°C的点的替代参考溶液 (糖和糖醇溶液).
- 调整了SWIR方法,以纳入这些零下参考解决方案.
- 将SWIR衍生的RRTW值与通过介电光谱学获得的RRTW值进行比较.
主要成果:
- 成功扩大了SWIR的温度适用性,用于0°C以下的RRTW测量.
- 证明了糖和糖醇溶液的有效性,作为可行的参考.
- 与介电光谱学相比,在RRTW值短于100皮秒 (psec) 的情况下,在10%的准确度内达成一致.
结论:
- 开发的使用替代参考的SWIR方法克服了传统的温度限制.
- 这一进步允许在零度以下温度下对样本进行可靠的RRTW分析.
- 这些发现支持使用修改后的SWIR在物理化学和材料科学中的更广泛应用.
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