Aspects of the present disclosure are directed to a method and a device for carrying out chemical, biochemical and/or immunochemical analyses of liquid samples, which are present in a sample store of an automatic analyzer, with the aid of liquid reagents, which are present in at least one reagent store of the analyzer. In one embodiment, a analyzer is disclosed including cuvettes for holding the liquid samples and reagents, the cuvettes are arranged in at least one stationary, linear cuvette array. The analyzer further has an optical measurement unit with a stationary light-supplying unit which has at least one light distributor device that feeds the light from a plurality of LED light sources emitting in a spectrally different manner in the UV/VIS/NIR wavelength range into the inlet windows of the individual cuvettes of the cuvette array. The optical measurement unit further includes a stationary detection unit assigned to outlet windows of the cuvettes and further includes a plurality of photodiodes.