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Boric acid and tetrafluoroboric acid in nickel baths

Apart from chloride and sulfate, nickel plating baths also contain boric acid, which is used as a buffer to maintain a certain pH value. Using potentiometric titration it is possible to determine both the free boric acid and the free tetrafluoroboric acid.

Procedure:
After addition of mannitol, the formed mannitol complexes are titrated with sodium hydroxide solution. The determination is carried out directly in the plating bath sample; nickel and other metal ions do not interfere. Read more