ions and 3H2NA is an essential assignment. In addition, it
yields to achieve a new method for the selective determination
of some metal ions.
From this perspective, this paper deals with the application
of 3H2NA to determine Al3+ in sub-level content. Two papers
were previously published in this field (Rodrıguez-Caceres
et al. 2005; Kirkbright et al. 1965). The interesting chelating
properties of 3H2NA, in particular its selectivity towards Al3+,
prompted us to reconsider the whole question of Al3+ determination
using 3H2NA owing to the following reasons.
1. Discrepancies between the two papers mentioned above;
for example with regard to the complex stability constant,
pH of the solution and the determination conditions.
2. The lack of any comprehensive study of the enhancement
of fluorescence emission due to the complexation process.
3. The need to clarify the use of acetic acid/acetate buffer
since acetic acid is, in fact, a ligand for Al3+ so its use in
large excess compared with the fluorogenic ligand could
be questionable.
Therefore, the aim of this work was firstly clarifying detailed
information on Al3+ complexation (stability constant
and the determination conditions) in the low concentration
range used for trace spectrofluorometric analysis. In this respect,
various factors which influenced the complex formation
between Al3+ and 3H2NAwere studied. After that, important
figures of merit for the determination of Al3+ were investigated.
The role of the possible interferences was also studied to
realize the method as a suitable procedure for the determination
of Al3+ in milk.
ions and 3H2NA is an essential assignment. In addition, it
yields to achieve a new method for the selective determination
of some metal ions.
From this perspective, this paper deals with the application
of 3H2NA to determine Al3+ in sub-level content. Two papers
were previously published in this field (Rodrıguez-Caceres
et al. 2005; Kirkbright et al. 1965). The interesting chelating
properties of 3H2NA, in particular its selectivity towards Al3+,
prompted us to reconsider the whole question of Al3+ determination
using 3H2NA owing to the following reasons.
1. Discrepancies between the two papers mentioned above;
for example with regard to the complex stability constant,
pH of the solution and the determination conditions.
2. The lack of any comprehensive study of the enhancement
of fluorescence emission due to the complexation process.
3. The need to clarify the use of acetic acid/acetate buffer
since acetic acid is, in fact, a ligand for Al3+ so its use in
large excess compared with the fluorogenic ligand could
be questionable.
Therefore, the aim of this work was firstly clarifying detailed
information on Al3+ complexation (stability constant
and the determination conditions) in the low concentration
range used for trace spectrofluorometric analysis. In this respect,
various factors which influenced the complex formation
between Al3+ and 3H2NAwere studied. After that, important
figures of merit for the determination of Al3+ were investigated.
The role of the possible interferences was also studied to
realize the method as a suitable procedure for the determination
of Al3+ in milk.
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