Liquid-Liquid Extraction of Acids by a Malonamide: II-Anion Specific Effects in the Aggregate-Enhanced Extraction Isotherms

2014 ◽  
Vol 32 (6) ◽  
pp. 620-636 ◽  
Author(s):  
Sandrine Dourdain ◽  
Christophe Déjugnat ◽  
Laurence Berthon ◽  
Véronique Dubois ◽  
Stéphane Pellet-Rostaing ◽  
...  
Keyword(s):  
Liquid Extraction ◽  
Specific Effects ◽  
Liquid Liquid Extraction ◽  
Extraction Isotherms

Liquid-Liquid Extraction of Acids and Water by a Malonamide: I-Anion Specific Effects on the Polar Core Microstructure of the Aggregated Malonamide

2014 ◽  
Vol 32 (6) ◽  
pp. 601-619 ◽  
Author(s):  
Christophe Déjugnat ◽  
Laurence Berthon ◽  
Véronique Dubois ◽  
Yannick Meridiano ◽  
Sandrine Dourdain ◽  
...  
Keyword(s):  
Liquid Extraction ◽  
Specific Effects ◽  
Liquid Liquid Extraction

Comparison of Sorption and Extraction Methods for Recovery of Trace Organics from Water

1983 ◽  
Vol 15 (6-7) ◽  
pp. 149-159 ◽  
Author(s):  
V C Blok ◽  
G P Slater ◽  
E M Giblin
Keyword(s):  
Solvent Extraction ◽  
Methylene Chloride ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Standard Mixture ◽  
Liquid Liquid Extraction ◽  
Trace Organics ◽  
Tenax Gc

Several commercially available adsorbents were compared with solvent extraction methods for their utility in recovering trace organics from water. The adsorbents examined included Amberlite XAD-2, XAD-4 and XAD-8, Ambersorb XE340 and XE348 and Tenax-GC. All were found to produce high artifact levels, even after extensive clean-up, making them unsuitable for the analysis of trace organics in water. Quantitatively, Likens-Nickerson or continuous liquid-liquid extraction with méthylene chloride gave better recoveries than the adsorbents. Qualitatively, extractive methods were preferred as they yielded much lower levels of impurities than the adsorbents. These methods of recovering trace organics were evaluated using a standard mixture of compounds added to the water at a level of 55 µg/l. Likens-Nickerson extraction gave comparable recoveries of this mixture at 55 µg/l and 11 µg/l.

Study of the film formation process in liquid-liquid extraction flow injection analysis

1991 ◽  
Vol 56 (6) ◽  
pp. 1228-1237 ◽  
Author(s):  
Vlastimil Kubáň
Keyword(s):  
Flow System ◽  
Detection System ◽  
Film Formation ◽  
Liquid Extraction ◽  
Photometric Detection ◽  
Liquid Liquid Extraction ◽  
Teflon Tube ◽  
Continuous Stream ◽  
Computer Controlled ◽  
Segmented Volume

The behaviour of a thin film of an organic solvent on the walls of the extraction coil in a continuous liquid-liquid extraction flow system was studied using a computer-controlled fast-recording on-tube photometric detection system (approx. 3 ms time resolution). A single-loop injector was employed to introduce precise, reproducible volumes (Sr < 2%) of one phase into the continuous stream of the other as a segmented volume standard. The film thickness Df, ranging from 1 to 20 μm for a 0.7 mm teflon tube, was calculated from the segment lengthening at a different chloroform flow rates and was found to obey a polynominal dependence on the linear flow rate, df = f(uα), where α < 1.

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