Recently, i want to study the stability of kaolinite in acid and alkine solution. How to measure the concentration of Al and Si in solution?
I think you can use that method without problems, however, I suggest make a liquid chromatography wiht an aliquot and separate the element wished, then, you can take values in change of density y mass and make a relation volume-volume.
Mr. Peixin
Ok, you can measure concentration using mass-mass or volume-volumen relationships sometimes is not easy convert these units, so that i means with my answering.
Mass mass relation is most easy all depend mass values, takes mass of salution, then, you takes all 'Al' of solution using chromatography and take mass values for Al, finally you would say how much Al you have for each unit mass of solution.
with vol vol relation is same but here you will need density, this relation is most used to calculate concentration.
Other way would be making Atomic absortion spectroscopy and your problem will be finished, this equipment gives you concetration directly for each element.
I hope i have been helpful.
Dear du Peixin,
Previous authors working on kaolinite dissolution used also colorimetric methods for Si and Al concentration measurements. With these methods you are sure that you measure dissolved Si and Al and not Si/Al colloids, while using AAS or ICPAES you will not be able to dicriminate between dissolved ions and colloids. Method proposed by Dougan and Wilson (1974) for dissolved Al measurements works well.
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