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 Facile Cloud Point Extraction for the Separation and Determination of Phenolic Acids from Dandelion

ACS Omega ◽  
2021 ◽  
Author(s):  
Yongsheng Ji ◽  
Le Wu ◽  
Ruihong Lv ◽  
Haohao Wang ◽  
Shuhui Song ◽  
...  
Keyword(s):  
Cloud Point ◽  
Phenolic Acids ◽  
Cloud Point Extraction

Determination of the Isoflavone Genistein in Soybeans by High-Performance Liquid Chromatography Following Cloud Point Extraction

2012 ◽  
Vol 95 (3) ◽  
pp. 845-849 ◽  
Author(s):  
Mohammad Mirzaei ◽  
Atieh Karimi Naeini ◽  
Mansoureh Behzadi
Keyword(s):  
Cloud Point ◽  
High Performance ◽  
Cloud Point Extraction ◽  
Uv Detector ◽  
Experimental Conditions ◽  
Solid Ratio ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Replicate Measurements

Abstract A simple and sensitive method has been developed for preconcentration and determination of genistein in soybeans. This method is based on cloud point extraction (CPE) of genistein from soybeans using ethylene glycol monoalkyl ether (Genapol X-080) as a nonionic surfactant. The concentration of extracted genistein was determined by HPLC with a UV detector. Optimum experimental conditions were established. With 5% Genapol X-080 (v/v), a liquid/solid ratio of 25:1 mL/g, and ultrasonic-assisted extraction at 40°C for 45 min, the extraction percentage of genistein reached its highest value. The preconcentration factor for genistein was about 16.5. The RSD for seven replicate measurements and the LOD were ±4.45% and 15.0 ng/mL, respectively. CPE is simple, inexpensive, and suitable for extraction of genistein from soybean. It uses environmentally friendly surfactants and offers a convenient alternative to more conventional extraction systems.

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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