A cloud point extraction for spectrophotometric determination of ultra- trace antimony without chelating agent in environmental and biological samples

2012 ◽  
Vol 178 (3-4) ◽  
pp. 399-404 ◽  
Author(s):  
Abdolraouf Samadi-Maybodi ◽  
Vida Rezaei
Keyword(s):  
Cloud Point ◽  
Spectrophotometric Determination ◽  
Biological Samples ◽  
Cloud Point Extraction ◽  
Chelating Agent ◽  
Environmental And Biological Samples ◽  
Ultra Trace

scholarly journals Cloud Point Extraction and Determination of Silver Ion in Real Sample using Bis((1H-benzo[d]imidazol-2yl)methyl)sulfane

2011 ◽  
Vol 8 (1) ◽  
pp. 435-442 ◽  
Author(s):  
Farshid Ahmadi ◽  
Khodabakhsh Niknam ◽  
Ebrahim Niknam ◽  
Saeid Delavari ◽  
Azadeh Khanmohammadi
Keyword(s):  
Cloud Point ◽  
High Efficiency ◽  
Cloud Point Extraction ◽  
Chelating Agent ◽  
Bath Temperature ◽  
Silver Ion ◽  
Complexing Agent ◽  
Ionic Surfactant ◽  
Ultra Trace

Bis((1H-benzo[d]imidazol-2yl)methyl)sulfane (BHIS) was used as a complexing agent in cloud point extraction for the first time and applied for selective pre-concentration of trace amounts of silver. The method is based on the extraction of silver at pH 8.0 by using non-ionic surfactant T-X114 and bis((1H-benzo[d]imidazol-2yl)methyl)sulfane as a chelating agent. The adopted concentrations for BHIS, Triton X-114 and HNO3, bath temperature, centrifuge rate and time were optimized. Detection limits (3SDb/m) of 1.7 along with enrichment factor of 39 for silver ion was achieved. The high efficiency of cloud point extraction to carry out the determination of analytes in complex matrices was demonstrated. The proposed method was successfully applied to the ultra-trace determination of silver in real samples.

scholarly journals Cloud Point Extraction for Pre-Concentration and Spectrophotometric Determination of Trace Amounts of Silver Ions

2020 ◽  
Vol 10 (03) ◽  
pp. 459-464
Author(s):  
Azhar A. Ghali
Keyword(s):  
Detection Limit ◽  
Cloud Point ◽  
Spectrophotometric Determination ◽  
Cloud Point Extraction ◽  
Incubation Temperature ◽  
Chelating Agent ◽  
Silver Ions ◽  
Ionic Surfactant ◽  
Triton X

During the last years, the cloud point extraction was applied for determination, separation, and enrichment of the elements. The current study used cloud point extraction (CPE) for the extraction of Ag(I) ions pre-concentration from watery solutions by a non-ionic surfactant (Triton X-114) and chelating agent a 6-(4-bromo-phenylazo)m-anisidine[6-(4-BrPAA)], then estimation by using the spectrophotometry at 514 nm. Several condition effects on the efficiency of the cloud-point extraction included Triton X-114 concentration, [6-(4-BrPAA)] concentration, pH, time, and incubation temperature. The silver reacts with [6-(4-BrPAA)] to produce complex at a ratio of one to one. 0.009 to 1.5 μg mL-1 is the range of linearity. The detection limit and quantification of Ag(I) ion were 0.0054 and 0.0182 μg mL-1, respectively. The interference of the cations was examined. The cloud-point extraction was used for the evaluation of silver concentration in the water specimen.

Cloud point extraction for ultra-trace Cd determination in microwave-digested biological samples by ETAAS

Talanta ◽  
2008 ◽  
Vol 77 (2) ◽  
pp. 663-666 ◽  
Author(s):  
P ARANDA ◽  
R GIL ◽  
S MOYANO ◽  
I DEVITO ◽  
L MARTINEZ
Keyword(s):  
Cloud Point ◽  
Biological Samples ◽  
Cloud Point Extraction ◽  
Ultra Trace

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+.

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