Capillary electrophoresis and CNTs solid-phase extraction of p-nitro-phenol in water with modeling study

ABSTRACT

p-Nitro-phenol was determined in water by capillary electrophoresis and solid-phase extraction methods. The optimization was at 150 g/L concentration, 1.0 g/L dose, 7.0 pH and 15 min’ contact time. Background electrolyte was phosphate buffer (15 mM, pH 7.0) with 18 kV voltage, 215 nm detection, 20 s sample loading time. The amount of p-nitro-phenol extracted in water was 90%. The detection and quantification limits of p-nitro-phenol were 0.3 and 2.8 ng/L. The modeling results of p-nitro-phenol with CNTs indicated hydrophobic and π-π stacked interactions as the sportive forces with −1.0 kcal/mole binding energy and 1.50 M⁻¹ binding affinity.

KEYWORDS:

• P-nitro-phenol
• solid-phase extraction
• carbon nanotubes
• capillary electrophoresis
• wastewater

Acknowledgements

This work was funded by the Deanship of Scientific Research at Princess Nourah bint Abdulrahman University, through the Research Groups Program Grant no. (RGP-1440-0017).

Disclosure statement

There is no conflict of interest.

Additional information

Funding

This work was funded by the Deanship of Scientific Research at Princess Nourah bint Abdulrahman University, through the Research Groups Program Grant no. [RGP-1440-0017].