Determination of chloride ion in concrete | Autotitrator COM-A19 - JM Science

Determination of chloride ion in concrete | Autotitrator COM-A19

Cement Concrete
This report introduces an example of the determination of chloride ion in concrete. This measurement method is described in “Potentiometric titration method using chloride ion-selective electrode” of “JIS A 1154 Method of test for chloride ion content in hardened concrete”. Nitric acid is added to adjust the pH to 3 or less, and extract chloride ion with boiling. Cool to room temperature, filtrate to separate undissolved component and collect filtrated solution as sample. Chloride ion is determined by precipitation titration using a silver nitrate standard solution.
Determination of chloride ion in cement | Autotitrator COM-A19 - JM Science

Determination of chloride ion in cement | Autotitrator COM-A19

Cement Concrete
This report introduces an example of the determination of chloride ion in cement. This measurement method is described in “Method for measuring chloride” of “Japanese industrial standard JIS R 5202 Method for chemical analysis of cements”. The sample is dissolved in nitric acid, a chloride ion standard solution and a hydrogen peroxide solution are added, and the sample is heat-treated, and then the measurement is performed by precipitation titration using a silver nitrate standard solution. The measurements are made by potentiometric titration using a chloride ion-selective electrode as the electrode for end point detection.