Actually , in ruffles chips, they have 330 mg of potassium. No lie.
Well, of course potatoes themselves are very high in potassium, but they lose a good deal of it in the chip-making process, besides having a lot of additives put in . This chart gives some idea of how the potato changes during processing.
According to my information every living cell possesses potassium ions so potatoes[ being plants] also have it