Jiangsu Research Institute of Building Science 1 article published in JoVE Engineering Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way Honglei Chang1,2, Song Mu2 1School of Materials Science and Engineering, Southeast University, 2State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science A protocol for obtaining a water-soluble chloride profile by using a high precision milling method is presented.