Measuring cartridge for measuring a liquid sample

A measuring cartridge for measuring at least one constituent of a liquid sample and for performing quality control, the cartridge comprising:

• a casing insertable into a reception opening of a measuring instrument, the casing at least partly surrounding an inner space;
• wherein the inner space contains:
• a measurement cell comprising a reception space for the sample and at least one sensor area with which the sample is in contact when loaded into the reception space;
• plural quality control containers for respectively holding different quality control solutions;
• and
• a solution routing system adapted to selectively route one of the quality control solutions from the respective quality control container into the reception space of the measurement cell, wherein the solution routing system comprises:
• a rotary distributor having plural inlets connected to at least the quality control containers and having at least one outlet engageable to an inlet of the measurement cell, the rotary distributor being adapted to allow solution communication between a selected inlet and the outlet.