scholarly journals Multivariate Optimization of a Simultaneous Cloud Point Extraction Procedure of Cd, Cu and Ni from Sediments Samples and Determination by ICP OES

2015 ◽  
Author(s):  
Leandro dos Santos ◽  
Queila O. dos Santos ◽  
Islania Moreno ◽  
Cléber G. Novaes ◽  
Márcio J. S. dos Santos ◽  
...  
Keyword(s):  
Cloud Point ◽  
Cloud Point Extraction ◽  
Extraction Procedure ◽  
Icp Oes ◽  
Multivariate Optimization

scholarly journals Multivariate optimization for cloud point extraction and determination of lanthanides

2012 ◽  
Vol 4 (9) ◽  
pp. 2809 ◽  
Author(s):  
Fernanda dos Santos Depoi ◽  
Fabrina R. S. Bentlin ◽  
Marco Flôres Ferrão ◽  
Dirce Pozebon
Keyword(s):  
Cloud Point ◽  
Cloud Point Extraction ◽  
Multivariate Optimization

scholarly journals Removal of Direct Yellow 12 from Water Samples by Cloud Point Extraction Using Triton X-100 as Nonionic Surfactant

2011 ◽  
Vol 8 (4) ◽  
pp. 1588-1595 ◽  
Author(s):  
Shahnaz Abedi ◽  
Farzin Nekouei
Keyword(s):  
Nonionic Surfactant ◽  
Cloud Point ◽  
Salt Concentration ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Extraction Procedure ◽  
Optimum Conditions ◽  
Single Extraction ◽  
Triton X

A surfactant mediated cloud point extraction (CPE) procedure has been developed to remove color from wastewater containing direct yellow 12 (Chrysophenine G), using triton x-100 (TX-100) as nonionic surfactant. The effects of the concentration of the surfactant, pH, temperature and salt concentration on the different concentration of dye have been studied and optimum conditions were obtained for the removal of direct yellow 12 (DY 12). The concentration of DY 12 in the dilute phase was measured using UV-Vis spectrophotometer. It was found that the separation of phases was complete and the recovery of DY 12 was very effective in the presence of NaCl as an electrolyte. The results showed that up to 600 mg L−1of DY 12 can quantitatively be removed (>96%) by Cloud point extraction procedure in a single extraction using optimum conditions.

Analysis of Six Organophosphorus Pesticide Residues in Apples and Pears Using Cloud-point Extraction Coupled with HPLC-UV

2014 ◽  
Vol 97 (4) ◽  
pp. 1202-1205 ◽  
Author(s):  
Lijin Zhang ◽  
Fang Chen ◽  
Wenhuan Zhang ◽  
Canping Pan
Keyword(s):  
Cloud Point ◽  
Extraction Method ◽  
Cloud Point Extraction ◽  
Organophosphorus Pesticides ◽  
Extraction Procedure ◽  
Organophosphorus Pesticide ◽  
Equilibrium Temperature ◽  
Equilibrium Time ◽  
Temperature Equilibrium ◽  
Triton X

Abstract A cloud-point extraction (CPE) method with Triton X-114 has been developed for analysis of six organophosphorus pesticides (OPPs) in apples and pears. In this CPE procedure, the effects of the surfactant volume, mass of sodium chloride, equilibrium temperature, equilibrium time, and pH on the extraction procedure were investigated. Under the optimal CPE conditions, the analytes were enriched 20-fold and the LODs dropped to 0.44–5.20 μg/kg. Furthermore, the proposed extraction method was validated by the correlation coefficient (R2) of the calibration curve, repeatability (RSD, n = 6), and fortified recoveries, which were 0.9967–0.9993, 2.7–6.5, and 74.7–104.5%, respectively. Based on these results, it could be concluded that the proposed CPE method with Triton X-114 was suitable for the effective extraction and enrichment of OPP residues in the apple and pear samples.

Flow injection system for the on-line preconcentration of Pb by cloud point extraction coupled to USN–ICP OES

2010 ◽  
Vol 95 (2) ◽  
pp. 306-310 ◽  
Author(s):  
Raúl A. Gil ◽  
José A. Salonia ◽  
José A. Gásquez ◽  
Alejandro C. Olivieri ◽  
Roberto Olsina ◽  
...  
Keyword(s):  
Cloud Point ◽  
Flow Injection ◽  
Cloud Point Extraction ◽  
Injection System ◽  
Icp Oes ◽  
On Line ◽  
Flow Injection System
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