de Glossar

Transmittance, internal spectral

ti(l)

Spectral internal transmittance ti(l) is the ratio of the light intensities at the outlet  (Fl)ex   and inlet  (Fl)in of the flow cell.

ti(l) = (Fl)ex / (Fl)in

Internal transmittance

Unlike the transmittance, in this case the reflection losses occurring at the flow cell windows have to be eliminated. In practice, this is done by running a comparative measurement of the carrier medium without the absorbent product.

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