Cloud point extraction for determination of Diazinon: Optimization of the effective parameters using Taguchi method

2012 ◽  
Vol 110 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Mahmoud Reza Sohrabi ◽  
Sarah Jamshidi ◽  
Ashkan Esmaeilifar
Keyword(s):  
Taguchi Method ◽  
Cloud Point ◽  
Cloud Point Extraction ◽  
Effective Parameters

scholarly journals A Cloud Point Extraction Procedure for Preconcentration/Flame Atomic Absorption Spectrometric Determination of Silver, Zinc, and Lead at Subtrace Levels in Environmental Samples

2009 ◽  
Vol 92 (3) ◽  
pp. 907-913 ◽  
Author(s):  
Mehrorang Ghaedi ◽  
Ardeshir Shokrollahi ◽  
Khodabakhsh Niknam ◽  
Ebrahim Niknam ◽  
Somayyeh Derki ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Cloud Point ◽  
Cloud Point Extraction ◽  
Extraction Procedure ◽  
Absorption Spectrometry ◽  
Effective Parameters ◽  
Rich Phase ◽  
Flame Atomic Absorption ◽  
Triton X

Abstract A cloud point extraction (CPE) procedure was presented for the preconcentration of silver, zinc, and lead ions in various samples. The complexes of these metal ions with 2-(((1H-benzo[d]imidazol-2-yl)methoxy)methyl)-1H-benzo[d]imidazole (BIMMBI) are quantitatively extracted into the Triton X-114-rich phase after centrifugation. A solution of 1.0 M HNO3 in methanol was added to the surfactant-rich phase as the effective eluant before analysis by flame atomic absorption spectrometry. The influence of effective parameters such as the concentrations of BIMMBI, Triton X-114, and HNO3, pH, bath temperature, centrifuge rate, and time on method sensitivity and efficiency was optimized. Detection limits of 2.8, 1.7, and 1.1 ng/mL for Pb2+, Ag+, and Zn2+, respectively, along with a preconcentration factor of 30 and enrichment factors of 33, 48, and 53 for Pb2+, Ag+, and Zn2+, respectively, were obtained. The present CPE method is suitable for accurate and precise determination of trace amounts of analyte ions in complex matrixes. The proposed CPE procedure was applied to the determination of these ions in biological, natural water, wastewater, soil, and blood samples.

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+.

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
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