Use of the chloride specific ion electrode to determine chloride in plants was evaluted. Direct potentiometric determination of chloride by the electrode resulted in unreproducible and extremely high chloride values. However, use of this electrode to indicate the end point in titration of the tissue‐extract mixture with AgNO3gave results nearly identical to those obtained by the Mohr procedure. The potentiometric titration procedure developed was found to be a rapid, simple and accurate method of determining the chloride concentration in plants.