The spectrophotometer photoLab™ 7600 UV-VIS combine routine analysis with spectral analysis and pioneering procedure OptRF. For the standard parameters COD, nitrate and nitrite, a spectrum in the UV range is evaluated by means of complex algorithms which are based on reference spectra. The result is put out directly as concentration reading, without the use of reagents. No potassium dichromate, no digestion - for quick testing.