This reaction produces a purple color directly proportional to catalase activity that can be determined by means of a simple and fast spectrophotometrical measure.

The method includes generating, using a processor, a multi-dimensional object from a plurality of data obtained from a spectrophotometric measurement of a target coating.

For that purpose there is provided after the dialyzer in or after the dialysing machine a measuring cell for spectrophotometric measurement.

Hydrolysis of this compound by chymotrypsin at the carbonyl group yields acetate and nitrophenolate, the latter of which absorbs near 400 nm light and its concentration can thus be measured by spectrophotometry (Figure \(\PageIndex{2}\)).

Prinect Inpress Control, the spectrophotometric inline measuring system, is key to significantly reducing makeready times and paper waste on the Speedmaster CX 102.

A first spectrophotometric measurement of the absorbance of bilirubin is made using two wavelengths, one of which is between about 450-480 nm and the other is between about 600-660 nm.

The toner contains at least a binding resin and a coloring agent and has a specific hue angle or specific wavelength absorbance shown in reflective spectrophotometric measurement.

Likewise, the assay may be conducted in a film medium by adding the fluid sample to the reagent incorporated in the film, and spectrophotometrically measuring reflectance or transmittance of the color indicating formazan.