Verfahren zur selektiven Bestimmung der Konzentration von geloesten Substanzen in enzymatischen Reaktionen

The description relates to a process for the selective measurement of the concentration of dissolved substances which are used as substrates in enzymatic reactions or which are formed into products. The invention is characterized by the measurement of the change in the optical absorption characteristic of the enzyme occurring during the enzymatic reaction or of the coenzyme (cofactor) linked to the enzyme or of the enzyme-coenzyme (cofactor) complex or of the enzyme-substrate complex or the enzyme-product complex and that the concentration of the substrates and/or products is determined from the change in the optical absorption characteristic.