An accurate and sensitive analytical strategy for the determination of palladium in aqueous samples: slotted quartz tube flame atomic absorption spectrometry with switchable liquid–liquid microextraction after preconcentration using a Schiff base ligand

Selective Fe(ii)-fluorescence sensor with validated two-consecutive working range using N,S,I-GQDs associated with garlic extract as an auxiliary green chelating agent

“…Furthermore, measuring iron concentrations in water samples is critical for environmental safety. 12 Solid phase extraction, 13 high performance liquid chromatography (HPLC), 14 inductively coupled plasma mass spectrometry (ICP-MS), 15 fiber-optic chemosensor, 16 inductively coupled plasma optical emission spectrometry (ICP-OES), 17 and slotted quartz tube-flame atomic absorption spectrometry (SQT-FAAS) 18,19 are currently used to determine Fe 2+ and Fe 3+ ions. Although these techniques are very sensitive and selective, they need time-consuming sample preparation and pre-concentration processes, as well as costly apparatus and experienced people.…”