Abstract:A conductivity detection-ion chromatography method for simultaneous determination of common anions in water samples was established by inline automatic calibration technology. A high concentration of 7 kinds of anion mixed mother liquor was used to quantitatively inject 4 ~ 200 μL through the Disino online dosing unit. The concentration of the seven anion injections showed a good linear relationship with the peak area. The correlation coefficients were all above 0.9999. The addition recoveries were in the range of between 93.6% ~ 106.5%, and the relative standard deviations (RSD) of the assays ranged from 1.52% to 2.79% (n = 6). The online automatic calibration method is simple in operation and good in accuracy, and can reduce the human error which configuration of the standard concentration in the working curve. The method suitable for the determination of F^-, Cl^-, NO2^-, Br^-, NO3^-, PO4^3-, SO4^2- in the water sample.