title: Towards metals analysis using corona discharge ionization ion mobility spectrometry.
abstract: For the first time, the capability of corona discharge ionization ion mobility spectrometry (CD-IMS) in the determination of metal complex was evaluated. The extreme simplicity of dispersive liquid-liquid microextraction (DLLME) coupled to the high sensitivity of CD-IMS measurement could make this combination really useful for simple, rapid, and sensitive determination of metals in different samples. In this regard, mercury, as a model metal, was complexed with diethyldithiocarbamate (DEDTC), and then extracted into the carbon tetrachloride using DLLME. Some parameters affecting the extraction efficiency, including the type and volume of the extraction solvent, the type and volume of the disperser solvent, the concentration of the chelating agent, salt addition and, pH were exhaustively investigated. Under the optimized condition, the enrichment factor was obtained to be 142. The linear range of 0.035-10.0 μg mL(-1) with r(2) = 0.997 and the detection limit of 0.010 μg mL(-1) were obtained. The relative standard deviation values were calculated to be lower than 4% and 8% for intra-day and inter-day, respectively. Finally, the developed method was successfully applied for the extraction and determination of mercury in various real samples. The satisfactory results revealed the capability of the proposed method in trace analysis without tedious derivatization or hydride generation.
authors: Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran. Electronic address: jafari@cc.iut.ac.ir.
authors: Mohammad T
authors: MT
authors: Jafari
authors: Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
authors: Mohammad
authors: M
authors: Saraji
authors: Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
authors: Hossein
authors: H
authors: Sherafatmand
mesh_terms: D000818:Animals; D000965:Antimony / Q000032:analysis; D001151:Arsenic / Q000032:analysis; D001729:Bismuth / Q000032:analysis; D005399:Fishes; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000032:analysis; D059627:Liquid Phase Microextraction; D008628:Mercury / Q000032:analysis; D008670:Metals / Q000032:analysis* / Q000737:chemistry*; D012492:Salts / Q000737:chemistry; D012643:Selenium / Q000032:analysis; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry
chemical_list: D008670:Metals; D012492:Salts; D014874:Water Pollutants, Chemical; D007854:Lead; D000965:Antimony; D008628:Mercury; D012643:Selenium; D001151:Arsenic; D001729:Bismuth
keywords: Corona discharge ionization; Dispersive liquid–liquid microextraction; Ion mobility spectrometry; Metal analysis