Technical Report: Changes in the Refractive Index of Water Due to Differences in Degassing Levels
The effect of improving detector stability through stable degassing by the degasser, which in turn enables high-sensitivity analysis, is widely recognized.
In a differential refractometer, stability can be achieved that cannot be obtained with methods such as helium purging.
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【Features】 ○ Traditionally, these effects were thought to be due to the removal or absence of tiny bubbles in the moving phase. ○ The figure shows a comparison of the difference in refractive index between de-gassed water on the reference side and water with varying levels of de-gassing on the sample side, using a differential refractometer, alongside the dissolved oxygen concentration. ○ Although there is some variability, the relationship between dissolved oxygen concentration and differential refractive index showed linearity. ○ This result provides direct evidence that the amount of dissolved gas is closely related to liquid density and that its stabilization is essential for various precise measurements. ● For more details, please contact us or refer to the catalog.
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Company information
IDEX Health & Science is a leading company in precision fluid control and optical control, headquartered in the United States. At IDEX Health & Science Co., Ltd. (IDEX Japan Factory), we develop and manufacture degassing devices (degassers) and refractive index detectors (RI detectors). (Former company name: E.R.C. Co., Ltd.)