Abstract
A simple and applied method based on O-3-Tert-butylphenyl N-(6-methoxy-2-pyridyl)-N-methylthiocarbamate (Pyributicarbamate; TBMPMTC) was used for arsenic speciation (AsIII and AsV) in urine and water samples by dispersive liquid-liquid microextraction (DLLME) procedure. The concentrations of arsenic in the liquid phase were determined by hydride generation atomic absorption spectrometry in the presence of flame accessory (HG-AAS). By procedure, a mixture of ionic liquid (0.1 g, [APMIM][PF6]@[HMIM][PF6]), acetone (0.2 mL) and pyributicarbamate was injected into wastewater sample containing arsenic (AsIII and AsV) ions, which were already extracted by pyributicarbamate at the optimized pH. The task-specific ionic liquid (TSIL) of 1-3-aminopropyl)-3-methyl-imidazoliumhexafluorophosphate [APMIM][PF6] was chemically synthesized and used for increasing of As(V) extraction in the liquid phase. As(III) was extracted based on the sulfur bond of pyributicarbamate at pH=5.3. As (V) can be extracted by amine group of TBMPMTC and [APMIM][PF6] at pH=3.0 (As(V) --- : NH2). The influence of parameters was studied.
Highlights
The toxicities of heavy metals in waters cause to main problem in humans and environment and cannot be biodegraded as VOCs
A few of them only determination without speciation such as graphite furnace atomic absorption spectrometry (GF-AAS) [8], Flame atomic absorption spectrometry (F-AAS) [9], hydride generation atomic absorption spectrometry (HG-AAS) [10], capillary electrophoresis with inductively coupled plasma-mass spectrometry (CE-ICP)[11] and arsenic species can be determined with ion chromatography coupled to inductively coupled plasma mass spectrometry (IC-ICP-MS)[12]
The liquidliquid extraction technique (LLE) and dispersive liquid-liquid microextraction (DLLME) was used for extraction analyte from liquid phase based on ligand by immiscible solvents or ionic liquid which was directly immersed in water samples and dispersed by acetone [16,17,18,19,20,21,22]
Summary
The liquidliquid extraction technique (LLE) and dispersive liquid-liquid microextraction (DLLME) was used for extraction analyte from liquid phase based on ligand by immiscible solvents or ionic liquid which was directly immersed in water samples and dispersed by acetone [16,17,18,19,20,21,22]. The organic solvents such as tetrachloride carbon are toxic. ILs have used as benign solvent in DLLME procedure
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