Issue 4, 2021

Nano-bismuth sulfide based dispersive micro-solid phase extraction combined with energy dispersive X-ray fluorescence spectrometry for determination of mercury ions in waters

Abstract

A selective method for the determination of mercury ions in different types of water samples by energy dispersive X-ray fluorescence spectrometry (EDXRF) was developed. Quantification of Hg(II) by EDXRF was preceded by ultra-sound assisted dispersive micro-solid phase extraction (USA-DMSPE) on nano-bismuth sulfide (nano-Bi2S3) as a solid sorbent. At pH 1 nano-Bi2S3 selectively adsorbs Hg(II) ions from aqueous samples with an adsorption capacity of 499.1 mg g−1. The experimental data fitted well with the Langmuir isotherm model, which confirms the chemical character of the adsorption process. Under optimized preconcentration conditions, i.e. a sample pH of 1, adsorbent mass of 1 mg, sample volume of 50 mL and sonication time of 15 min, the linear response between fluorescence radiation intensity and the metal concentration was obtained within 1–200 ng mL−1 range with a correlation coefficient of 0.9988. The method allows the detection of mercury ions at a concentration of only 0.06 ng mL−1. The determination of Hg(II) ions after the nano-Bi2S3 based USA-DMSPE-EDXRF procedure is possible even in the presence of a high concentration of anions and cations typically coexisting in surface waters. The described method was applied to the determination of Hg(II) ions in mineral, spring, river, and artificial sea waters. The correctness of the procedure was confirmed by analysis of the certified reference material (Seawater QC3163).

Graphical abstract: Nano-bismuth sulfide based dispersive micro-solid phase extraction combined with energy dispersive X-ray fluorescence spectrometry for determination of mercury ions in waters

Associated articles

Article information

Article type
Paper
Submitted
19 Nov 2020
Accepted
04 Feb 2021
First published
05 Feb 2021

J. Anal. At. Spectrom., 2021,36, 786-795

Nano-bismuth sulfide based dispersive micro-solid phase extraction combined with energy dispersive X-ray fluorescence spectrometry for determination of mercury ions in waters

K. Pytlakowska, E. Malicka, E. Talik and A. Gągor, J. Anal. At. Spectrom., 2021, 36, 786 DOI: 10.1039/D0JA00477D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements