Sodium storage solution hi 401645l for use with a fc300b sodium ion selective electrode ise conditioning and storage solution for calcium ise hi 400445l ph electrode maintenance kit hi phcarekit contains cleaning solution ph4 01 and ph 7 01 buffer solution hi 7061 cleaning solution and hi 70300 storage solution all in 230ml bottles. Ideally a storage solution should be used. This solution is prepared with high grade potassium chloride and potassium hydrogen phthalate by titration with nist 2201 standardised silver nitrate and nist 84j standardised sodium hydroxide solution respectively.
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