An online ionic liquid-based microextraction system coupled to electrothermal atomic absorption spectrometry for cobalt determination in environmental samples and pharmaceutical formulations

Complex Formation in a Liquid-Liquid Extraction System Containing Cobalt(II), 4-(2-Pyridylazo)resorcinol, and Nitron

“…− , which can readily react with bulky organic compounds [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] to give ternary complexes with good extraction behavior and analytical potential. In the present paper, we investigated the complex formation in a liquidliquid extraction system containing Co(II), PAR, and Nitron (Nt).…”

Liquid-phase microextraction combined with graphite furnace atomic absorption spectrometry: A review

“…For instance, Co has been determined in parenteral nutrition samples and ophthalmic solution samples. No pretreatment was required [114]. Another related publication involves the preconcentration of Au by DLLME from pharmaceutical samples containing sodium aurothiomalate [153].…”

“…Analytes were finally eluted with a microvolume of MIBK and introduced into the graphite furnace. Wuilloud et al proposed an on-line DLLME approach that has been applied to the determination of V[117], Co[114], inorganic Se species[19], and As species[11]. The proposed preconcentration system involved the use of a flow injection device for performing the extraction of the hydrophobic complexes by an IL, retention of the extracts in a Florisil-packed micro-column, elution and injection of an aliquot of the enriched phase into a GFAAS.…”

Development of a dispersive liquid-liquid microextraction technique for the analysis of aryloxyphenoxy-propionate herbicides in soy-based foods

“…There has been a large number of works that use nitrogen-based RTILs (NB-RTILs) as the solvent extraction in LLE, especially those with the cation dialkylimidazolium, while the use of phosphonium-based RTILs (PB-RTILs) is very scarce. Recently, a flow injection system for online IL-DLLME using the less dense than water IL tetradecyl(trihexyl)phosphonium chloride (Cyphos 101) for preconcentration of cobalt (Co) was presented [24]. Also, the use of tetradecyl(triehexyl)phosphonium bis-2,4,4-trimethylpentylphosphinate (Cyphos 104) as an effective extractant of lactic acid (LA) in aqueous systems by LLE have been measured [25].…”