Determination of copper(II) by flame atomic absorption spectrometry after its perconcentration by a highly selective and environmentally friendly dispersive liquid–liquid microextraction technique

Journal of Analytical Science and Technology

Table 7 Comparison between the developed method and some preconcentration methods combined with flame atomic absorption spectrometry

Preconcentration method	Chelating agent	Disperser	Extraction phase	LOD (μg L⁻¹)	PF or EF	CI (mL)	Ref.
CPE	Me-BDBD		Triton X-114	1.5	14	0.71	Lemos et al. 2007
CPE	ARS	–	Triton X-114	1.07	21	0.57	Şatıroğlu and Arpa 2008
CPE	Br-PADAP	–	Triton X-114	1.5	25	2.0	Xu et al. 2013
DLLME	HOX	Methanol	Chloroform	3.0	42	0.24	Farajzadeh et al. 2008
DLLME	–	Ethanol	1,2-DCB	0.50	–	–	Mohammadi et al. 2009
IL-DLLME	TMK	Acetone	([Hmim][Tf2N]	0.45	136.6	0.073	Khani et al. 2011
UA-IL-DLLME	H2L	Acetone	[HMIM][PF6]	1.9	56	0.18	Rajabi et al. 2014
SS-LPME	PAN	–	Triethylamine	1.8	25	0.85	Yilmaz and Soylak 2015
Ss-LLME	Dimethyl dithiocarbamate	–	1-decanol	0.52	53	0.19	Yilmaz and Soylak 2014
DLLME	Salophen	Acetone	Chloroform	0.60	49	0.20	This work

PF preconcentration factor, EF efficiency factor, CI consumptive index, LOD limit of detection, CPE cloud point extraction, DLLME dispersive liquid–liquid microextraction, UA-IL-DLLME ultrasound-assisted ionic liquid-based dispersive liquid–liquid microextraction, SS-LPME switchable solvent-based liquid-phase microextraction, Ss-LLME Supramolecular solvent-based liquid–liquid microextraction, Br-PADAP 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol, 1,2-DCB 1,2-dicholorobenzene, Me-BDBD 6-[20-(60-methyl-benzothiazolylazo)]-1,2-dihydroxy-3,5-benzenedisulfonic acid, ARS Alizarin Red S, [Hmim][Tf2N] 1-hexyl-3-methylimmidazolium bis(trifluormethylsulfonyl)imid, TMK 4,4′-bis(dimethylamino)thiobenzophenone, [HMIM][PF6] 1-hexyl-3-methylimidazolium hexafluorophosphate, H2L N,N′-bis(2-salicylaldiminato)-1,8-diamino-3,6-dioxaoctane, HOX 8-hyroxyquinolone, PAN 1-(2-pyridylazo)-2 naphthol, Salophen N,N′-bis (salycilidene)-1,2-phenylenediamine