scholarly journals Spectrophotometric Determination of Paracetamol in Urine with Tetrahydroxycalix[4]arene as a Coupling Reagent and Preconcentration with Triton X-114 Using Cloud Point Extraction

2006 ◽  
Vol 54 (6) ◽  
pp. 891-896 ◽  
Author(s):  
Hayati Filik ◽  
İzzet Şener ◽  
Sema Demirci Cekiç ◽  
Emine Kiliç ◽  
Reşat Apak
Keyword(s):  
Cloud Point ◽  
Spectrophotometric Determination ◽  
Cloud Point Extraction ◽  
Coupling Reagent ◽  
Triton X

scholarly journals Room temperature cloud point extraction: An application to preconcentration and spectrophotometric determination of copper(II)

2020 ◽  
Vol 85 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Denys Snigur ◽  
Alexander Chebotarev ◽  
Vitaliy Dubovyi ◽  
Dmytro Barbalat ◽  
Anastasiia Klochkova
Keyword(s):  
Sulfuric Acid ◽  
Cloud Point ◽  
Spectrophotometric Determination ◽  
Cloud Point Extraction ◽  
Limit Of Detection ◽  
Extraction Procedure ◽  
Rich Phase ◽  
Triton X ◽  
Determination Of Copper

The novel cloud point extraction procedure for preconcentration of copper(II) was discovered. A simple chemical method for initiating the cloud point extraction (CPE) has been proposed. The formation of surfactant rich phase in a system containing a nonionic surfactant Triton X-100, copper(II), 6,7-dihydroxy-4-methyl-2-phenylbenzopyrilium chloride (DHMPhB) and ammonium benzoate is observed immediately upon the sulfuric acid addition into solution. Under the optimal conditions (absorption band maximum was 540 nm, concentration 1.5?10-4 mol dm-3 of DHMPhB, 1.0 vol.% of Triton X-100, 2.0 cm3 of 0.75 mol dm-3 ammonium benzoate, and 1.0 cm3 of 0.5 mol dm-3 sulfuric acid solution for obtaining benzoic?benzoate buffer solution with pH 4.5 and initiation immediate surfactant rich phase formation) the calibration plot for spectrophotometric determination of copper(II) was linear in the range of copper(II) concentration 0.02?0.95 ?g cm?3. The limit of detection was calculated 0.006 ?g cm?3. The water samples were analyzed according to a suggested procedure with satisfactory results.

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.

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+.

Determination of scandium in monazite and environmental samples using cloud point extraction coupled with a spectrophotometric technique

RSC Advances ◽  
2016 ◽  
Vol 6 (77) ◽  
pp. 73797-73804
Author(s):  
Alaa S. Amin ◽  
Mohammed A. Kassem ◽  
Sayed M. N. Moalla
Keyword(s):  
Cloud Point ◽  
Environmental Samples ◽  
Cloud Point Extraction ◽  
Triton X

Effect of 5.0% Triton X-100 on the complexation of 40 ng mL−1 Sc(iii) with ATAP.

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