absorption cell

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ab·sorp·tion cell

a small glass chamber with parallel sides, in which absorption spectra of solutions can be obtained.
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5 that consisted of the following parts: absorption cell of 1 m length and of 1 [dm.
The spectrum of the absorption cell is measured synchronously at exactly the same time instances as the output of the Mach-Zehnder interferometer.
The unit is a single-mode optical-fiber-coupled absorption cell containing carbon monoxide [[blank].