Hanna Instruments Storage Solution, 16 oz

Hanna storage solutions are prepared with high-grade potassium chloride and potassium hydrogen phthalate by titration with NIST 2201 standardized silver nNitrate and NIST 84j standardized sodium hydroxide solution, respectively. To minimize clogging and ensure fast response time, always keep the glass bulb and the junction of your pH electrode moist.