Linear alkyl benzene(LAB) has many advantages of appreciable light yield

relatively long light attenuation length and environment friendly

etc.It is selected as the LS solvent in the Daya Bay Reactor Neutrino Experiment.To make sure that LAB can meet the experimental requirements on light attenuation length in the 350-450 nm wavelength rang

we developed an improved system to measure

in a faster and more accurate way

light attenuation length of the LAB liquid samples.LAB samples before and after purification by filtration with β-Al2O3 and silica gel powders were measured

and composition analyses of the LAB samples were performed.In the experiments we found the chemical impurities that reduced the light attenuation length of the LAB product

and based on the findings the producer optimized the production process to reduce the impurity concentration.The LAB product is qualified for its application in the Daya Bay Reactor Neutrino Experiment.