Separation and preconcentration of mercury in water samples by ionic liquid supported cloud point extraction and fluorimetric determination

2011 ◽  
Vol 177 (1-2) ◽  
pp. 47-52 ◽  
Author(s):  
Serap Seyhan Bozkurt ◽  
Kasim Ocakoglu ◽  
Melek Merdivan
Keyword(s):  
Ionic Liquid ◽  
Cloud Point ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Fluorimetric Determination ◽  
Separation And Preconcentration

scholarly journals Development of a Cloud-Point Extraction Method for Cobalt Determination in Natural Water Samples

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Mohammad Reza Jamali ◽  
Mohammad Gholinezhad ◽  
Saiedeh Balarostaghi ◽  
Reyhaneh Rahnama ◽  
Seyed Hojjat Allah Rahimi
Keyword(s):  
Cloud Point ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Limit Of Detection ◽  
Cobalt Content ◽  
Cobalt Ions ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Separation And Preconcentration ◽  
Triton X

A new, simple, and versatile cloud-point extraction (CPE) methodology has been developed for the separation and preconcentration of cobalt. The cobalt ions in the initial aqueous solution were complexed with 4-Benzylpiperidinedithiocarbamate, and Triton X-114 was added as surfactant. Dilution of the surfactant-rich phase with acidified ethanol was performed after phase separation, and the cobalt content was measured by flame atomic absorption spectrometry. The main factors affecting CPE procedure, such as pH, concentration of ligand, amount of Triton X-114, equilibrium temperature, and incubation time were investigated and optimized. Under the optimal conditions, the limit of detection (LOD) for cobalt was 0.5 μg L-1, with sensitivity enhancement factor (EF) of 67. Calibration curve was linear in the range of 2–150 μg L-1, and relative standard deviation was 3.2% (c=100 μg L-1;n=10). The proposed method was applied to the determination of trace cobalt in real water samples with satisfactory analytical results.

Optimization of an analytical method for the spectrophotometric determination of copper in tea and water samples after ultrasonic assisted cloud point extraction using a benzothiazole fluorescein derivative complexing agent

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 65321-65327 ◽  
Author(s):  
Chunlei Fan ◽  
Shengxu Luo ◽  
Rong Liu
Keyword(s):  
Cloud Point ◽  
Spectrophotometric Determination ◽  
Water Samples ◽  
Analytical Method ◽  
Cloud Point Extraction ◽  
Complexing Agent ◽  
Ultrasonic Assisted ◽  
Determination Of Copper

BTF is exists with spirolactone species with adding Cu2+, which leads to the absorbance intensity is decreased gradually and the decrease of the absorbance value is linear for Cu2+.

scholarly journals Automatic On-Line Purge-and-Trap Sequential Injection Analysis for Trace Ammonium Determination in Untreated Estuarine and Seawater Samples

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1569
Author(s):  
Athina Dimitriadou ◽  
Aristidis Anthemidis
Keyword(s):  
Water Samples ◽  
Environmental Water ◽  
Sequential Injection Analysis ◽  
Gaseous Ammonia ◽  
Sequential Injection ◽  
Fluorimetric Determination ◽  
Purge And Trap ◽  
Separation And Preconcentration ◽  
On Line ◽  
T System

An innovative automatic purge-and-trap (P&T) system coupled with fluorimetric sequential injection (SI), for the on-line separation and preconcentration of volatile compounds, is presented. The truth of concept is demonstrated for the ammonium fluorimetric determination in environmental water samples with complex matrices without any pretreatment. The P&T flow system comprises a thermostated purge-vessel where ammonium is converted into gaseous ammonia and a trap-vessel for ammonia collection. This configuration results in matrix removal as well as analyte preconcentration, avoiding membrane-associated problems. All the main parameters affecting the efficiency of a P&T system were studied and optimized. The proposed method is characterized by a working range of 2.7–150.0 μg L−1 of NH4+, with a detection and quantification limit of 0.80 and 2.66 μg L−1, respectively, for a 10-mL sample consumption. The accuracy of the method was assessed by recovery assays in seawater, estuarine, and lake water samples as well as by the analysis of standard reference material.

Sign in / Sign up

Export Citation Format

Share Document