Selective preconcentration of silver by one-step displacement dispersive liquid–liquid microextraction and determination by graphite furnace atomic absorption spectrometry

Interference-free Determination of Pb in Complicated Matrices by Displacement-Cloud Point Extraction Coupled With Thermospray Flame Furnace Atomic Absorption Spectrometry

“…Previously, a displacement CPE (D-CPE) was developed by Wu et al (13,14) to improve the selectivity of the CPE protocol for metal ions. The mechanism of D-CPE was similar to the displacement-sorption preconcentration strategy initially developed by Yan and co-workers (15)(16)(17)(18)(19)(20). The selectivity of these preconcentration protocols has been substantially improved, which paves the way for preconcentration of trace analytes in complicated matrices.…”

Simultaneous temperature-assisted dispersive liquid–liquid microextraction of cobalt, copper, nickel and zinc ions from high-volume water samples and determination by graphite furnace atomic absorption spectrometry

“…8 It is noteworthy to mention that the metal content in water can also provide essential information on the levels of contamination in the environment. [9][10][11] Several quantication methods such as ame atomic absorption spectrometry (FAAS), 12,13 inductively coupled plasma mass spectrometry (ICP-MS), [14][15][16][17] inductively coupled plasma optical emission spectrometry (ICP-OES), [18][19][20] and graphite furnace atomic absorption spectrometry (GFAAS) [21][22][23][24] have been applied to the determination of heavy metal ions. GFAAS is the most common technique because of its speed and good sensitivity.…”

Poly-γ-glutamic acid modified magnetic nanoparticles for fast solid phase extraction of trace amounts of Cu(ii) and Pb(ii)

“…1 Hence, development of effective methods for removal and determination of heavy metals in environmental samples is of particular signicance. Several advanced instruments such as inductively coupled plasma optical emission spectrometry (ICP-OES), 3 inductively coupled plasma mass spectrometry (ICP-MS), 4 graphite furnace atomic absorption spectrometry (GFAAS), 5 and ame atomic absorption spectrometry (FAAS) 6 have been applied for determination of the trace metals in biological and environmental samples. Even though the advanced techniques such as ICP-MS are more accurate than FAAS, FAAS is still the routine instrument in many laboratories due to its fast detection procedure, simplicity and low cost.…”

“…To solve these problems, a separation and enrichment step is required before determination. Several methods have been applied for separation and preconcentration of trace heavy metal ions, such as cloud point extraction, 8 biosorption, 9 dispersive liquid-liquid microextraction, 5 and solid-phase extraction (SPE). 10 Among these techniques, SPE is more popular for its simplicity, high enrichment factor, and low reagent consumption.…”