Recovery of zinc sulphate from industrial effluents by liquid–liquid extraction using D2EHPA (di-2-ethylhexyl phosphoric acid)

2007 ◽  
Vol 53 (1) ◽  
pp. 89-96 ◽  
Author(s):  
D PEREIRA ◽  
S ROCHA ◽  
M MANSUR
Keyword(s):  
Phosphoric Acid ◽  
Zinc Sulphate ◽  
Industrial Effluents ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction

scholarly journals Comparison of two sample preparation procedures for HPLC determination of ochratoxin A

2009 ◽  
Vol 61 (4) ◽  
pp. 639-644 ◽  
Author(s):  
Gorica Vukovic ◽  
Snezana Pavlovic ◽  
M.S. Ristic
Keyword(s):  
Sample Preparation ◽  
Phosphoric Acid ◽  
Ochratoxin A ◽  
Chromatographic Determination ◽  
Liquid Extraction ◽  
Immunoaffinity Column ◽  
Maize Flour ◽  
Liquid Liquid Extraction ◽  
Immunoaffinity Columns

In preparation of samples for chromatographic determination of ochratoxin A, two types of columns were used for sample cleanup (SPE and immunoaffinity columns). The first method consisted of liquid-liquid extraction with a mixture of chloroform and phosphoric acid, followed by ion-exchange cleanup on Waters Oasis MAX columns. The sec?ond method consisted of extraction with a mixture of water and methanol, followed by LCTech OtaCLEAN immunoaf?finity column cleanup. Recoveries of the methods were determined at three levels in three repetitions for maize flour, and they were 84% (%RSD = 19.2) for the first method of sample preparation and 101% (%RSD = 2.2) for the second method. Values of LOQ for OTA were 0.25 and 1.00 ?g/kg for the IAC and SPE clean-up procedures, respectively. Both methods comply with present regulations, but the MAX sample clean-up procedure should be used as an alternative, since the immunoaffinity column clean-up procedure is characterized by better reproducibility, accuracy, and efficiency.

Use of combined solvent extraction-electrodeposition techniques to uranium and thorium isotopes analysis in industrial phosphoric acid, phosphate and phosphogypsum by alpha-particle spectrometry

2003 ◽  
Vol 91 (1) ◽  
Author(s):  
R. Zarki ◽  
A. Elyahyaoui ◽  
A. Chiadli
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Isotopic Composition ◽  
Alpha Particle ◽  
Phosphate Rock ◽  
Liquid Extraction ◽  
Acid Phosphate ◽  
Liquid Liquid Extraction ◽  
Thorium Isotopes

SummaryA method combining liquid-liquid extraction and electrodeposition procedures is carried out to determine isotopic composition of uranium and thorium in technical wet phosphoric acid, phosphate rock and phosphogypsum leachates, by

scholarly journals Liquid-liquid extraction technique for purification of Egyptian WET process phosphoric acid

2010 ◽  
Vol 54 (2) ◽  
pp. 57 ◽  
Author(s):  
Ali Akl Magda ◽  
Mohammed Youssef Abdul Fatah ◽  
Mohammed Ali Mohsen ◽  
Ibraheim Amin Mostafa
Keyword(s):  
Phosphoric Acid ◽  
Liquid Extraction ◽  
Extraction Technique ◽  
Wet Process ◽  
Liquid Liquid Extraction

Interfacial activity of bis(2-ethylhexyl) phosphoric acid in model liquid-liquid extraction systems

1997 ◽  
Vol 44 (1-2) ◽  
pp. 163-178 ◽  
Author(s):  
J. Szymanowski ◽  
G. Cote ◽  
I. Blondet ◽  
C. Bouvier ◽  
D. Bauer ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Liquid Extraction ◽  
Interfacial Activity ◽  
Model Liquid ◽  
Liquid Liquid Extraction
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