AbstractA sequential flow injection method for simultaneous chloride and fluoride determination in waters with potentiometric detection is described. The method is based on the simultaneous chloride and fluoride potentiometric detection using two ion selective electrodes in two serial flow‐through cells. The necessary ionic strength adjustment is obtained by mixing the TISAB solution with the sample by diffusion during the propelling process to the detection cells. The new method was applied successfully to drinking water sample
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