Ferric ion induced enhancement of ultraviolet vapour generation coupled with atomic fluorescence spectrometry for the determination of ultratrace inorganic arsenic in surface water

Abstract

A novel method of ultraviolet vapour generation (UVG) coupled with atomic fluorescence spectrometry (AFS) was developed for the determination of ultratrace inorganic arsenic (iAs) in surface water. In this work, different ferric species were utilised for the first time as an enhancement reagent for the ultraviolet vapour generation of As(III), and their UVG efficiencies for volatile species of arsenic were investigated. 15 mg L(-1) of ferric chloride provided the greatest enhancement of approximately 10-fold, using 20% acetic acid combined with 4% formic acid with 30 s ultraviolet irradiation at 200 mL min(-1) Ar/H2 flow rate. Under the optimised conditions, the linear range was 1.0 μg L(-1)-100.0 μg L(-1), and the spiked recoveries were 92%-98%. The limit of detection was 0.05 μg L(-1) for iAs, and the relative standard deviation (RSD) value of the repeated measurements was 2.0% (n = 11). This method was successfully applied to the determination of ultratrace iAs in tap water, river water, and lake water samples using 0.2% H2SO4 (v : v) as the sample preserver. The obtained values for the water samples of certified reference materials (CRMs) including GSB-Z50004-200431, GBW08605 and GBW(E)080390 were all within the certified ranges.

Copper Ion Assisted Photochemical Vapor Generation of Chlorine for Its Sensitive Determination by Sector Field Inductively Coupled Plasma Mass Spectrometry

“…Only PVG of Cl − in formic and propionic acid media was investigated as well. It was found that the presence of even 0.1% formic acid in the 1% acetic acid solution led to an almost 60% decrease in 35 Cl intensity. In the presence of 1% propionic acid, the resultant 35 Cl response was merely 0.4% of that from pure 1% acetic acid.…”

“…It was found that the presence of even 0.1% formic acid in the 1% acetic acid solution led to an almost 60% decrease in 35 Cl intensity. In the presence of 1% propionic acid, the resultant 35 Cl response was merely 0.4% of that from pure 1% acetic acid. In accordance with the generally accepted free radical mechanism of PVG, 34 it is speculated that formic acid may generate water-soluble HCl, which remains in the solution, whereas propionic acid may produce ethyl chloride having much lower volatility.…”

Synthesis of Sulfonylhydrazone Type Probe with High Selectivity for Rapid Detection of Mercury and Its Application in Adsorption and HeLa Cell

“…At present, traditional detection methods of mercury ions, including atomic absorption spectrometry, atomic fluorescence spectrometry, electrochemical method and inductive coupling, mostly depend on large apparatus, profes-sional operators and involve high costs, which make these unsuitable for on-site detection of mercury ion. [5][6][7][8][9][10][11] Therefore, we need to find a simple method to detect mercury ions. However, the spectrometric method has the advantages of simplicity, rapidity, low cost and high sensitivity, which is used in various fields.…”

Highly selective and sensitive fluorescent probe possessing AIEE and ICT properties for rapid detection of Pb2+ in aqueous medium and its applications in living cells

“…Therefore, it is highly desirable to develop a new structure that sensitively and selectively detects Pb 2+ below the WHO recommended limit and apply it in environmental media, especially in aqueous media. Various conventional methods have been developed for the detection of Pb 2+ such as atomic absorption spectrometry and inductively coupled plasma mass spectrometry, [ 9–16 ] but these techniques are time consuming, expensive, complicated, and unsuitable for biological applications. In contrast, fluorescence detection has become the most promising strategy for detecting Pb 2+ ions, due to its low cost, simple operation, good biocompatibility, high sensitivity, good selectivity, and fast application.…”