In environmental chemistry, the chemical oxygen demand (COD/BOD) test is commonly used to indirectly measure the amount of organic compounds in water L800 is a dedicated on-line analyzer for determining true COD/BOD values in water matrices, in compliance with standard methods. L800 uses UV absorbance/fluorescence spectroscopy full spectram (180-720nm) technology, provides selective, accurate and real-time measurement of COD/BOD.