Page 12 - Catalogue - cuvettes and solid-state calibration standards

Matching

 Means that the cuvettes are manufactured from materials that have transmission properties within 1% of each
other. Accordingly, only the absorption directly through the lightpath of the cuvette is tested – other parameters
used in fluorimetry are not addressed. At the point at which all parameters are sustained to a high degree the
cuvette is “matched” by the fact that there is little distinction in any of the cells of the same physical
configuration, lightpath and material. With more modern machines and stringently controlled manufacturing
processes, Matching is not as important nowadays. FireflySci cells are manufactured within extremely tight
tolerances that ensure superior matching.

Transmission

 Describes how well light passes through the optically polished windows of a cuvette at different wavelengths
and is expressed in %. The measurement scale is 0-100%.

Z-dimension (Zd)

 The Z-dimension – also known as Zd or centre height – is the height from the very bottom of the cell to the
centre of its sample chamber. Particularly if the cuvette’s polished window is very small (in thiscase, usually the
entire cuvette is black except for the window) it’s critical that the Zd of the cuvette be the same as the height of
the instrument’s light beam. Generally, Zd is either 8.5, 15 or 20 mm, depending on the instrument’s
manufacturer.

 Only certain cuvettes depend on the correct Z-dimension and you’ll find the relevant information in their data
tables. If you’re uncertain which Zd you need for your instrument, please ask us.

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All prices are shown in Euro and are subject to VAT where applicable.