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A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
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The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The...
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Updated: May 15, 2025

O-cresol Concentration Online Measurement Based On Near Infrared Spectroscopy Via Partial Least Square Regression
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用超宽动态范围进行度测量,使用几步可变光学路径长度斜率方法.

Mingwei Zhao1, Xujun Yuan1, Li Wei1

  • 1Engineering Research Center of Optical Instrument and System, The Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Yangpu District, Shanghai 200093, China.

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概括
此摘要是机器生成的。

一种新的几步可变光学路径长度斜率方法 (fs-VOSM) 允许超宽动态范围的度测量. 这种技术为环境和生物医学应用提供了高精度和可重复性.

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科学领域:

  • 分析化学 分析化学
  • 频谱学是一种光谱学.
  • 环境科学 环境科学

背景情况:

  • 度测量在环境污染评估和生物医学研究中至关重要.
  • 使用固定,长光路径的传统方法不适合高度样本.
  • 现有的度测量技术的动态范围和适用性存在限制.

研究的目的:

  • 为超宽动态范围的度测量引入一种新的几步可变光路径长度斜率方法 (fs-VOSM).
  • 开发和验证具有更高准确性和可重复性的fs-VOSM系统.
  • 为了证明该方法对高度溶液的有效性.

主要方法:

  • 实施了几步可变光学路径长度斜率方法 (fs-VOSM).
  • 开发一个 fs-VOSM 系统,其中包含一个参考路径,以提高精度.
  • 在800 ms的超短光学路径 (0-20 μm) 上,在五个位置进行测量.

主要成果:

  • fs-VOSM系统在度测量方面实现了超宽的动态范围,从0.879g/L到70.726g/L,用于二酸盐溶液.
  • 证明了高精度,相对误差在±3.5%以内.
  • 证实了出色的重复性,变化系数 (CV) 低于1.4%.

结论:

  • 拟议的fs-VOSM是用于超宽动态范围度测量的稳健方法.
  • 与传统方法相比,fs-VOSM系统在准确性和可重复性方面提供了显著的改进.
  • 这种技术有可能在先进的分析仪器中得到广泛采用,例如工艺分析仪和度计.