Use of dimethylglyoxime, acenaphthenequinone dioxime and mixed ligands of dimethylglyoxime and acenaphthenequinone dioxime supported on naphthalene for the pre-concentration and determination of nickel in alloys, tea and water samples using atomic absorption spectrometry

The Analyst ◽  
1989 ◽  
Vol 114 (7) ◽  
pp. 813 ◽  
Author(s):  
Masatada Satake ◽  
Jun'ichiro Miura ◽  
Shiro Usami ◽  
Bal Krishan Puri
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Water Samples ◽  
Absorption Spectrometry ◽  
Mixed Ligands ◽  
Determination Of Nickel

Ultrasonic-assisted cloud point extraction for determination of nickel in water samples by flame atomic absorption spectrometry

2012 ◽  
Vol 66 (4) ◽  
pp. 792-798 ◽  
Author(s):  
Jun Song ◽  
Wei Zhen ◽  
Zonghao Li ◽  
Yuanpei Lian ◽  
Yaling Yang
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Determination Of Nickel ◽  
Ultrasonic Assisted

A novel method for the determination of nickel was established by ultrasonic-assisted cloud point extraction (UA-CPE) prior to flame atomic absorption spectrometry (FAAS) analysis. The nickel reacted with N,N'-bis(salicylidene)-1,2-ethanediamine (BSE) to form hydrophobic chelates, which were extracted into the micelles of alpha-[3,5-dimethyl-1-(2-methylpropyl)hexyl]-omega-poly(oxy-2-ethanediyl) (Tergitol TMN-6). Tergitol TMN-6 was used as green nonionic surfactant. BSE was synthesized and checked by nuclear magnetic resonance (NMR) spectra. The phase diagrams of the binary system, water–surfactant (Tergitol TMN-6), and the ternary systems, water–surfactant–salt, were determined. The effects of experimental conditions including pH of sample solution, concentration of chelating agent and surfactant, ultrasonic power, equilibration temperature and incubation time were evaluated in order to enhance sensitivity of the method. Under the optimal conditions, the calibration graph was linear in the range of 10–500 μg L–1. The values obtained for the limit of detection and enrichment factor were 1.0 μg L–1 and 30, respectively. The method was successfully applied to the analysis of nickel in water samples.

scholarly journals Determination of cobalt in water samples by atomic absorption spectrometry after pre-concentration with a simple ionic liquid-based dispersive liquid-liquid micro-extraction methodology

2010 ◽  
Vol 8 (3) ◽  
pp. 617-625 ◽  
Author(s):  
Hossein Abdolmohammad-Zadeh ◽  
Elnaz Ebrahimzadeh
Keyword(s):  
Ionic Liquid ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Water Samples ◽  
Limit Of Detection ◽  
Absorption Spectrometry ◽  
Experimental Conditions ◽  
Flame Atomic Absorption ◽  
Relative Standard

AbstractA rapid dispersive liquid-liquid micro-extraction (DLLME) methodology based on the application of 1-hexylpyridinium hexafluorophosphate [C6py][PF6] ionic liquid (IL) as an extractant solvent was applied for the pre-concentration of trace levels of cobalt prior to determination by flame atomic absorption spectrometry (FAAS). 1-Phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) was employed as a chelator forming a Co-PMBP complex to extract cobalt ions from aqueous solution into the fine droplets of [C6py][PF6]. Some effective factors that influence the micro-extraction efficiency include the pH, the PMBP concentration, the amount of ionic liquid, the ionic strength, the temperature and the centrifugation time which were investigated and optimized. In the optimum experimental conditions, the limit of detection (3s) and the enrichment factor were 0.70 µg L−1 and 60, respectively. The relative standard deviation (RSD) for six replicate determinations of 50 µg L−1 Co was 2.36%. The calibration graph using the pre-concentration system was linear at levels 2–166 µg L−1 with a correlation coefficient of 0.9982. The applicability of the proposed method was evaluated by the determination of trace amounts of cobalt in several water samples.

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