Trace humic and fulvic acid determination in natural water by cloud point extraction/preconcentration using non-ionic and cationic surfactants with FI-UV detection

The Analyst ◽  
2003 ◽  
Vol 128 (5) ◽  
pp. 453-458 ◽  
Author(s):  
Jorgelina C. A. de Wuilloud ◽  
Rodolfo G. Wuilloud ◽  
Baki B. M. Sadi ◽  
Joseph A. Caruso
Keyword(s):  
Fulvic Acid ◽  
Cloud Point ◽  
Natural Water ◽  
Cationic Surfactants ◽  
Cloud Point Extraction ◽  
Uv Detection ◽  
Extraction Preconcentration ◽  
Acid Determination

Determination of Trace Mercury by Cloud Point Extraction Preconcentration Coupled with Spectrophotometry

2007 ◽  
Vol 7 (20) ◽  
pp. 3123-3126 ◽  
Author(s):  
Mahmoud Reza Sohrabi ◽  
Elham Farokhi ◽  
Atena Adnani ◽  
Mona Ziaian
Keyword(s):  
Cloud Point ◽  
Cloud Point Extraction ◽  
Extraction Preconcentration

scholarly journals A new ligandless cloud point extraction method for preconcentration of iron from natural water samples and FAAS detection

2017 ◽  
Vol 17 (5) ◽  
pp. 1347-1355
Author(s):  
Cennet Karadaş ◽  
Derya Kara
Keyword(s):  
Cloud Point ◽  
Natural Water ◽  
Water Samples ◽  
Extraction Method ◽  
Cloud Point Extraction ◽  
Incubation Temperature ◽  
Sample Volume ◽  
Ionic Surfactant ◽  
Flame Atomic Absorption ◽  
Natural Water Samples

A simple, efficient and inexpensive ligandless cloud point extraction method was developed for the preconcentration of trace amounts of iron from natural water samples, followed by flame atomic absorption spectrometry detection. The proposed method is based on the extraction of Fe(III) ions at pH 7.0 using the non-ionic surfactant Triton X-114 without the addition of any chelating ligand. The effect of parameters influencing the extraction efficiency such as sample pH, concentration of surfactant, incubation temperature and time, concentration of NaCl and sample volume were investigated and optimized. The effect of potentially interfering ions on the recovery of iron was also examined. Under optimum conditions, the detection limit (3σ) was 0.95 μg L−1 for Fe using a sample volume of 10 mL. A preconcentration factor of 20 was achieved. The accuracy of the method was checked through the analysis of certified reference materials (SLRS-5 river water, SPS-SW2 Batch 127 surface water) and spiked water samples. The percentage recovery values for spiked water samples were between 92% and 101%.

Sign in / Sign up

Export Citation Format

Share Document