Chloride determination in plant tissue using a solid state chloride ion specific electrode

A solid state Ion Specific Electrode was evaluated for direct determination of chloride in extracts of oven dried, ground plant material. When samples were extracted with water, the electrode response was slow and there was a tendency to overestimate tissue chloride concentrations. When extracted with 0.5 M HNO3 the response time was fast and the recovery of added chloride close to 100 percent. The method developed is simple, rapid, and accurate