Chemical Review and Letters

Study of oil emulsion and oil dispersion properties of quaternary ammonium salts and their use as analytical reagents

Document Type : Research Article

Authors

Ali Zalov 1
Asya F. Shahverdiyeva 1, 2
Sultan G. Aliyev 3

1 Azerbaijan State Pedagogical University, AZ 1000, U. Hajibekova St.68, Baku, Azerbaijan

2 Academician Y.H. Mammadaliyev Institute of Petrochemical Processes of the Ministry of Science and Education of the Republic of Azerbaijan, AZ1025, Baku, 30 Khojaly ave.

3 Azerbaijan State University of Oil and Industrial, AZ 1000, Baku, Azadlig Avenue 16/21, Azerbaijan

https://doi.org/10.22034/crl.2025.534472.1656
Abstract
ABSTRACT: The oil-collecting and oil-dispersing properties of a quaternary ammonium salt (QAS) formed by octadecane (8-DA) and cis-9-octadecenoic acid (8 -cis-9-DA) with triethanolamine (TEA) {triethanolammonium salt of 8-DA and triethanolammonium salt of 8 -cis-9-DA}, as well as its use as an analytical reagent for the extractionphotometric determination of nickel in the form of a mixed-ligand complex (MLC) with 2-hydroxy-5-chlorothiophenol (L) and QAS in water were studied. The maximum absorption of MLC Ni(II)-L-QAS is observed at λ = 500-510 nm (pHop. 3.5–5.9). The molar absorption coefficients range from (2.58-2.71)×10⁴. With single extraction using chloroform, 99.1–99.3% of nickel is extracted as MLC. Beer's law is followed within the range of 1.0–90 µg/mL of nickel. The methods we proposed were applied under already established optimal conditions for the determination of nickel in various objects: in wastewater and bottom sediments of metallurgical plants, in samples of natural soils, and also in samples of food products.

Graphical Abstract

Study of oil emulsion and oil dispersion properties of quaternary ammonium salts and their use as analytical reagents

Keywords

Quaternary ammonium salt
Octadecane acid
Cis-9-octadecenoic acid
triethanolammonium salt
mixed-ligand complex
2-hydroxy-5-chlorothiophenol

Subjects

Chemical Review and Letters
Volume 8, Issue 5 - Serial Number 5
September and October 2025
Pages 955-966

  • Receive Date 14 July 2025
  • Revise Date 08 August 2025
  • Accept Date 18 September 2025

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