Old and New Flavors of Flame (Furnace) Atomic Absorption Spectrometry

Table 4

Selected papers using FAAS and preconcentration strategies with ionic liquids.

Sample (s)	Analyte	Remarks	Preconcentration factor	LOD	Complexing agent	Ref.
Kidney, liver, tea and water	Cd (II)	TSIL-MBT could be recycled at least 5 cycles.	—	0.19 μg/L	1-Butyl-3-methylimidazolium hexafluorophosphate [C4mim][PF6] that contained hydrophobic task specific ionic liquid (TSIL) functionalized 2-mercaptobenzothiazole (MBT)	[173]
Black tea, rice flour, and water.	Ni	PAN complex was back-extracted into acidified aqueous phase	40.2	12.5 μg/L	[C4mim][PF6], containing PAN as complexing agent.	[174]
Water, table salt andfood grade NaNO3	Pb and Cd	Home-made microsample introduction valve combined with atom concentrator tube (ACT) improved sensibility	273 (Pb) and 311 (Cd)	0.6 (Pb) and 0.03 (Cd) μg/L	Analytes were complexed with DDTC and extracted by using NaPF6 and ethanol containing of [Hmim][PF6].	[175]
Water and milk	Zn	Optimum pH 9.5	71	0.22 μg/L	Zinc was complexed with 8-hydroxyquinoline and extracted with 1-hexylpyridinium hexafluorophosphate [HPy] [PF6] ionic liquid	[176]