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Determination of trace aluminum using resonance Rayleigh scattering method with chrome azurol S and hexadecyl trimethyl ammonium bromide system

Li Sheng, Feng Han, Xin Zhang, Haisu Li, Ying Mi, and Biquan Su

School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, China

 

E-mail: 2647528103@qq.com

Received: 18 October 2022  Accepted: 17 May 2023

Abstract:

In this experiment, the resonance Rayleigh scattering spectra of the Al(III)-chromium azure S-cetyltrimethyl ammonium bromide system were investigated. The optimal experimental conditions of the system were optimized, the interference of other ions to the system was investigated, and the reaction mechanism was discussed. The results show that: Aluminum(III) forms an anion with chromium azure S in a weakly acidic medium and then forms ionic association with cetyltrimethyl ammonium bromide under electrostatic and hydrophobic effects, which increases the resonance Rayleigh scattering intensity of the system. The mass concentration of Al(III) at 598.1 nm showed a good linear relationship with the resonance Rayleigh scattering intensity in the range of 0.02–0.16 μg/mL with the correlation coefficient of 0.9989 and the detection limit of 1.8 ng/mL. The relative standard deviation (RSDS, n = 6) was less than 1.1%, and the spiked recoveries were in the range of 93.5–100.8%. The measured values were consistent with atomic absorption spectrometry.

Keywords: Resonance Rayleigh scattering spectra; Aluminum ion; Chrome azurol S; Cetyltrimethylammonium bromide

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02878-1

 

Chemical Papers 77 (9) 5473–5479 (2023)

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