马尔文用户手册定义:
The obscuration is simply the fraction of light “lost” from the main beam when the sample is introduced. For example, an obscuration of 30% means that 30% of the incident laser beam (recorded during the Measure Background step) has been lost through scattering or absorption.
Obscuration – this helps the user to set the concentration of the sample when it is added to the dispersant. It is a measure of the amount of laser light lost due to the introduction of the sample into the analyser beam.
The obscuration term can be expressed mathematically:
Ob = 1 - Ls/Lb
Ls is the light intensity measured in the central detector when a sample is present in the cell, Lb is the same but with clean dispersant (i.e. with no sample).
Obscuration is usually expressed as a percentage: 100 x Ob. An ideal range is between 3 and 20%, depending on the sample and dispersion
unit used.
该帖子作者被版主
mlb2003加 3积分,
2经验,加分理由:鼓励回帖