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Determination of Monoaromatic Hydrocarbons in Water Samples by Nano-Liquid Chromatography Using a Composite Carbon Nanotubes- Lauryl Polymethacrylate Capillary Monolithic Column

Author(s):

Ahmad Aqel*, Soad S. Alzahrani, Asma`a Al-Rifai, Mohammed Alturkey, Kareem Yusuf, Zeid A. ALOthman and Ahmed-Yacine Badjah-Hadj-Ahmed   Pages 1 - 11 ( 11 )

Abstract:


Background: This work reports a green analytical method for the determination of organic environmental pollutants using nano-liquid chromatography with a self-made column for rapid, sensitive, inexpensive and efficient analysis of BTX pollutants in water. The applications of monolithic nanoscale columns for quantitative analysis of environmental real samples are very limited in the literature.

Methods: A capillary column containing a composite of multi-walled carbon nanotubes incorporated into a lauryl methacrylate-co-ethylene dimethacrylate poro

Results: Baseline separation was accomplished at 0.4 μL/min flow rate with UV-detection set at 208 nm. Under the optimum conditions, the calibration curves were validated over the range of 1.0-500 μg/L with R2 more than 0.9992. The detection limits of benzene, toluene, o-xylene and m/p-xylene were 0.25, 0.05, 0.075 and 0.05 μg/L, respectively. After a simple extraction process with a theoretical preconcentration factor equal to 200, the recovery values in Milli-Q, tap and sea water samples were found to be ranged from 84.85 to 97.84% with %RSD less than 7.5. Furthermore, we reported a comparison between our prepared composite column with a commercial C18 silica based column which is the most used in such analytical field. Each column demonstrated its advantages from different analytical aspects.

Conclusion: The application of monolithic columns and nano-scale LC for routine analysis of environmental samples is very promising as the use of monolithic capillary columns offers several advantages over conventional scale particulate packed columns.

Keywords:

BTX pollutants, carbon nanotubes, lauryl methacrylate monolith, nano-liquid chromatography.

Affiliation:

Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451



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