for form Al3+, it may be observed that the signal does not come from this form,
which is related to the sample pH. Mos tprobably , the transformation (degradation)
of aluminum in hydroxy form in to form Al3+ occurs, caused by the in fluence of
the mobile phase. In the case of the variability evaluation of the occurrence of
aluminum, fluorides and aluminum fluoride complexes depending on pH, the
occurrence of aluminum fluoride complexes can be observed. Especially at the low
pH reaction and predominance of fluorides (this particularly concerns both soil
water extracts and groundwater samples ) the occurrence of aluminumin the form