g) Transfer the precipitate together with the crucible type glass filter into a drying
apparatus and heat at 120 ºC ± 2 ºC for 1 hour.
h) After heating, move it quickly into a desiccator and let it stand to cool.
i) After standing to cool, remove the crucible type glass filter from the desiccator and
measure the mass to the order of 1 mg.
j) Calculate citrate soluble potassium (C-K2O) by the following formula in the analytical
sample