Related Experiment Video
Updated: Aug 7, 2026

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
Published on: July 1, 2016
Simultaneous cloud-point extraction of nine cations from water samples and their determination by flame atomic
Mir Ali Farajzadeh1, Mohammad Rasoul Fallahi
1Department of Chemistry, Faculty of Science, University of Urmia, Iran. farajzade@yahoo.com
Abstract:
The cloud-point methodology was successfully employed for the preconcentration of heavy metal cations at trace levels from aqueous samples prior to flame atomic absorption spectrometry (FAAS). Cations were taken into a complex with 8-quinolinol in an aqueous non-ionic surfactant, Triton X-114, medium and concentrated in the surfactant rich phase by bringing the solution to the cloud-point temperature. The preconcentration of only 100 mL of the solution with 1% Triton X-114 and 10(-3) M 8-quinolinol at pH 7.0 gave a preconcentration factor higher than 100 for most cations. Under these conditions, the detection limits of the cloud-point extraction-FAAS system were 0.8 - 15 microg/L.
Related Concept Videos
Atomic Absorption Spectroscopy: Lab
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
Atomic Absorption Spectroscopy: Atomization Methods
Atomic Emission Spectroscopy: Instrumentation
Atomic Emission Spectroscopy: Lab
Flame Photometry: Lab
Qualitative Analysis
For instance, group IV...

