This is a soil salinity test. This method quantifies the concentration of chloride in a saturation paste extract. Chloride may be determined using an ion selective electrode (potentiometric), chloridometer or ion chromatography instrument methods. Plant tolerance to chloride can be related to its concentration in the soil saturation paste extract. The method detection limit is approximately 0.1 mmolc/L dependent on the method of analysis and is generally reproducible within ± 10%.