Multivariate optimization of mercury determination by flow injection-cold vapor generation-inductively coupled plasma optical emission spectrometry

Abstract

In this work a procedure for mercury determination by Flow Injection-Cold Vapor Generation-Inductively Coupled Plasma Optical Emission Spectrometry (FI-CVG-ICP OES) has been developed. The system uses a small homemade glass separator constructed to drive the Hg vapor to the plasma. An evolutionary operation factorial design was used to evaluate the optimal experimental conditions for mercury vapor generation, aiming at the low consumption of reagents, the improvement of the analytical signal and consequently greater sensitivity. The procedure allowed the determination of mercury and showed excellent linearity for the concentration range from 0.50 μg L(-1) to 100.0 μg L(-1), with Limits of Detection (LOD) and Quantification (LOQ) of 0.11 μg L(-1) and 0.36 μg L(-1), respectively, and a sampling rate of 36 analyses per hour. The optimized procedure showed good accuracy and precision, and the method was validated by the analysis of two certified reference materials: Buffalo River Sediment (NIST 2704) and human hair (IAEA 085). A good agreement with the certified values was achieved, with recovery values of 99% and 98% and relative standard deviation close to 2%.

Avaliação da liberação de elementos traço em solos tratados com xisto retortado

“…Para a determinação de Hg por ICP OES foi utilizado o método de geração de vapor a frio proposto por dos Santos et al 31 e para quantificar o As foi utilizado o método de geração de hidretos. 32 …”

Biomagnetic separation and pre-concentration of trace amounts of Hg2+ in biological samples based on T-rich oligonucleotide modified magnetic beads

“…In recent years, different analytical techniques have been used for the determination of low concentrations of mercury, including cold vapor atomic absorption spectrometry, 12 cold vapor atomic uorescence spectrometry, 13 inductively coupled plasma optical emission spectrometry 14 and inductively coupled plasma mass spectrometry. 15 One of the most widely used analytical techniques for the determination of mercury in clinical specimens is CV AAS.…”

Development of a gold nanoparticle based anti-aggregation method for rapid detection of mercury(ii) in aqueous solutions

“…[1][2][3][4] Because of its medical and ecosystem relevance, the detection of Hg 2+ has been investigated extensively. 5 Conventional atomic spectroscopic techniques, including atomic absorption spectroscopy, [5][6][7][8][9][10][11] atomic emission spectroscopy, 5,6,[12][13][14][15][16] and atomic uorescence spectroscopy, [17][18][19][20] have been commonly applied in detecting Hg 2+ . In addition, inductive coupled plasma mass spectrometry 6,21,22 and various electrochemical methods have been widely used in analyzing Hg 2+ levels.…”