After the optimization of all the parameters affecting Sn–HQSA
complex formation, the developed methodology was evaluated
for Sn concentrations between 1 and 10mgL−1 (Fig. 2) and a
linear calibration plot was obtained: IF = 5.552 (±0.096) conc
(mg L−1)+7.231 (±0.591) (IF—fluorescence intensity; conc—Sn concentration,
mgL−1).