Atomic number: | 19 |
Atomic weight: | 39.0983 |
Average concentration in ocean: | 10.2 mmol/kg |
Residence time: | 12,000,000 years |
Speciation
Potassium is present in seawater as the K+ ion.
Residence time
The sodium residence time is from Tracers in the Sea (Broecker, W. S. and Peng,
T.-H., 1982. Eldigo Press, Palisades, NY). It was calculated from
the global average river input.
Analysis
Potassium can be determined gravimetrically as potassium tetraphenylborate or by
atomic absorption spectrometry.
References